List of the Cenozoic life of California

This list of the Cenozoic life of California contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of California and are between 66 million and 10,000 years of age.

A
  • †Abantis
    • †Abantis velifer
  • Abies
    • †Abies concoloroides
    • †Abies klamathensis
  • †Aboma
    • †Aboma antiqua – type locality for species
  • †Acalypha
    • †Acalypha aequalis
  • Acanthina
    • †Acanthina spirata
  • Acanthocardia
    • †Acanthocardia brewerii – type locality for species
    • †Acanthocardia sorrentoense
  • Acar
    • †Acar bailyi – or unidentified comparable form
  • Accipiter
    • †Accipiter velox
  • Acentrophryne
    • †Acentrophryne longidens
  • Acer
    • †Acer aequidentatum
    • †Acer scottiae
  • Acesta
    • †Acesta multiradiata
  • †Achaenodon
    • †Achaenodon robustus – or unidentified comparable form
  • Acila
    • †Acila castrensis
    • †Acila conradi
    • †Acila decisa
    • †Acila gabbiana
    • †Acila muta
    • †Acila semirostrata – or unidentified comparable form
    • †Acila shumardi
  • Acipenser
    • Illustration of a living Acipenser medirostris, or green sturgeon
      †Acipenser medirostris – or unidentified comparable form
  • Acmaea
    • †Acmaea dickersoni – or unidentified related form
    • †Acmaea digitalis – or unidentified comparable form
    • †Acmaea insessa
    • †Acmaea limatula
    • †Acmaea mitra
    • †Acmaea persona
    • †Acmaea ruckmani – or unidentified comparable form
    • †Acmaea tejonensis – or unidentified comparable form
  • Mounted fossilized skeleton of the Miocene horse Acritohippus
    †Acritohippus
    • †Acritohippus isonesus – or unidentified comparable form
    • †Acritohippus quinni – type locality for species
    • †Acritohippus stylodontus
    • †Acritohippus tertius – or unidentified comparable form
  • †Acritoparamys – or unidentified comparable form
  • Acteocina
    • †Acteocina culcitella
    • †Acteocina inculta
    • †Acteocina magdalensis
  • Acteon
    • †Acteon boulderanus
    • †Acteon lawsoni
    • †Acteon punctocaelatus
    • †Acteon traski
  • Actinemys
    • A living Actinemys marmorata, or western pond turtle
      †Actinemys marmorata
  • †Acutostrea
    • †Acutostrea idriaensis
    • †Acutostrea miguelensis
  • Admete
    • †Admete rhyssa
  • Adula
    • †Adula californiensis
    • †Adula diegensis
  • Aechmophorus
    • †Aechmophorus elasson
    • †Aechmophorus occidentalis
  • †Aechomophorus
    • †Aechomophorus occidentalis
  • †Aeila
    • †Aeila decisa
  • †Aelurodon
    • †Aelurodon asthenostylus
    • †Aelurodon taxoides
  • Life restoration of the Miocene camel Aepycamelus, or the long-necked camel. Heinrich Harder (1920).
    †Aepycamelus
    • †Aepycamelus alexandrae
  • Aequipecten
    • †Aequipecten andersoni
  • Aesopus
    • †Aesopus chrysalloides
  • Aethia
    • †Aethia barnesi – type locality for species
    • †Aethia rossmoori – type locality for species
  • †Aethomylos
    • †Aethomylos simplicidens
  • Agaronia
    • †Agaronia mathewsoni – or unidentified comparable form
    • †Agaronia mathewsonii – or unidentified comparable form
  • †Agasoma
    • †Agasoma acuminatum
    • †Agasoma gravida
    • †Agasoma gravidum
    • †Agasoma kerrianum
    • †Agasoma sinuata
  • Agelaius
    • †Agelaius phoeniceuus
  • Fossilized mandible of the Miocene-Pleistocene bear Agriotherium
    †Agriotherium
  • †Ailanthus
    • †Ailanthus lesquereuxi
  • Akera
    • †Akera maga
  • Alaba
    • †Alaba catalinensis
    • †Alaba jeannettae
  • Alabina
    • †Alabina io – or unidentified comparable form
    • †Alabina tenuisculpta
  • †Albicetus
    • †Albicetus oxymycterus – type locality for species
  • †Albireo
    • †Albireo savagei – type locality for species
  • Alca
  • †Alcodes
    • †Alcodes ulnulus – type locality for species
  • Aleochara
  • Aletes
    • †Aletes squamigerus
  • Restorative model of the Miocene deer relative Aletomeryx
    †Aletomeryx
    • †Aletomeryx occidentalis – type locality for species
  • †Alforjas
  • Aligena
    • †Aligena cerritensis
  • †Alilepus
    • †Alilepus hibbardi
  • †Alisea – type locality for genus
    • †Alisea grandis – type locality for species
  • †Allodelphis – type locality for genus
    • †Allodelphis pratti – type locality for species
    • †Allodelphis woodburnei – type locality for species
  • Fossilized skeleton of the Miocene seal Allodesmus
    †Allodesmus
    • †Allodesmus gracilis – type locality for species
    • †Allodesmus kelloggi – type locality for species
    • †Allodesmus kernensis
  • †Alluvisorex
    • †Alluvisorex chasseae – type locality for species
  • Alnus
    • †Alnus corrallina
    • †Alnus operia
  • †Alopecocyon – type locality for genus
    • †Alopecocyon leardi – type locality for species
  • Alopias
    • †Alopias exigua – or unidentified comparable form
    • †Alopias latidens
    • Caught Alopias vulpinus, or common thresher
      †Alopias vulpinus – or unidentified comparable form
  • Alvania
    • †Alvania acutelirata
    • †Alvania compacta
    • †Alvania iliuliukensis – or unidentified related form
  • †Alveojunctus
    • †Alveojunctus bowni – type locality for species
  • Amaea
  • Amara
  • †Amaurellina
    • †Amaurellina caleocia
    • †Amaurellina martinezensis
    • †Amaurellina moragai
  • Amauropsis
    • †Amauropsis alveata
  • Flowers and foliage of Amelanchier, or shadbush
    Amelanchier
  • Amiantis
    • †Amiantis – type locality for species informal
    • †Amiantis callosa
    • †Amiantis diabloensis
    • †Amiantis mathewsoni
  • Ammobaculites
    • †Ammobaculites cubensis
    • †Ammobaculites strathearnensis – type locality for species
  • Ammospermophilus
    • †Ammospermophilus fossilis
  • †Amorpha
    • †Amorpha condonii
    • †Amorpha oklahomensis
  • †Amphicyon
    • †Amphicyon ingens
  • Fossilized skull of the Miocene saber-toothed cat Amphimachairodus
    †Amphimachairodus
    • †Amphimachairodus coloradensis – or unidentified comparable form
  • Amphimorphina
    • †Amphimorphina ignota
  • Amphissa
  • Amphiura
    • †Amphiura santaecrucis
  • †Amphora
    • †Amphora ovalis
    • †Amphora perpusilla
  • †Ampullina
    • †Ampullina schencki – or unidentified comparable form
  • Amusium
    • †Amusium lompocensis
  • †Amussiopecten
    • †Amussiopecten vanvlecki
  • †Amynodon
    • †Amynodon advenus – or unidentified comparable form
    • †Amynodon reedi
  • †Amynodontopsis
    • †Amynodontopsis bodei – type locality for species
  • Anachis
    • †Anachis coronata
  • Collection of Anadara marine ark clams
    Anadara
    • †Anadara devincta
    • †Anadara obispoana
    • †Anadara osmonti
    • †Anadara perlabiata
    • †Anadara reinharti
    • †Anadara rivulata
    • †Anadara santana – type locality for species
    • †Anadara submontereyana
    • †Anadara trilineata
  • Anaphothrips
    • †Anaphothrips vitreus – type locality for species
  • Anas
    • †Anas americana
    • †Anas carolinense
    • †Anas clypeata
    • †Anas platyrhynchos
  • †Anchitheriomys – or unidentified comparable form
  • Fossilized limb bones, and teeth of the Miocene three-toed horse Anchitherium (left)
    †Anchitherium
    • †Anchitherium clarencei
  • †Anchura
    • †Anchura baptos
  • Ancilla
    • †Ancilla fishii
    • †Ancilla gabbi – tentative report
  • †Angelosquilla
    • †Angelosquilla altamirensis
  • Angulogerina
  • Angulus
    • †Angulus buttoni
    • †Angulus castacana
    • †Angulus joaquinensis
    • †Angulus jollaensis – or unidentified comparable form
    • †Angulus longa
    • †Angulus lutea – or unidentified comparable form
  • Anniella
  • Anodontia
    • †Anodontia edentuloides
    • †Anodontia inflata
  • †Anomalina
    • †Anomalina californiensis
    • †Anomalina garzaensis
  • Anomalinoides
    • †Anomalinoides globosa – or unidentified comparable form
  • Anomia
    • †Anomia mcgoniglensis
    • †Anomia peruviana
    • †Anomia vaquerosensis – type locality for species
  • †Ansen
    • †Ansen albifrons
  • Anser
    • †Anser albifrons
  • †Antecalomys
    • †Antecalomys valensis
    • †Antecalomys vasquezi
  • †Antiacodon
    • †Antiacodon venustus
  • Antigona
    • †Antigona undosa
  • †Antilla
    • †Antilla batequensis
  • A living Antilocapra, or pronghorn
    Antilocapra
  • Antrozous
    • †Antrozous pallidus
  • †Anzanycteris
    • †Anzanycteris anzensis
  • †Apataelurus – or unidentified comparable form
  • †Apatemys
    • †Apatemys bellus
    • †Apatemys downsi – type locality for species
    • †Apatemys uintensis
  • Aphelocoma
    • †Aphelocoma californica
  • †Aphelophlebodes – type locality for genus
    • †Aphelophlebodes stocki – type locality for species
  • Reconstructive illustration of the skeleton of the Miocene-Pleistocene hornless rhinoceros Aphelops
    †Aphelops
    • †Aphelops megalodus
  • Apiotoma
    • †Apiotoma californiana
  • Aplodontia
    • †Aplodontia rufa
  • Aprionodon
  • Apsena
    • †Apsena laticornis – type locality for species
    • †Apsena pubescens
    • †Apsena rufipes
  • Aquila
    • A living Aquila chrysaetos, or golden eagle
      Aquila chrysaetos
  • †Araeosteus
    • †Araeosteus rothi
  • Arbutus
    • †Arbutus matthesii
  • Arca
    • †Arca hornii – type locality for species
    • †Arca montereyana
    • †Arca pacifica – or unidentified comparable form
    • †Arca santaclarana
    • †Arca sisquocensis
    • †Arca terminumbonis
  • †Arceuthobium
  • Fossilized skull of the Oligocene bone-crushing dog Archaeocyon
    †Archaeocyon
    • †Archaeocyon pavidus
  • †Archaeohippus
    • †Archaeohippus mourningi
    • †Archaeohippus ultimus
  • †Archaeolagus
    • †Archaeolagus acaricolus – type locality for species
  • †Archaeolithothamnion
    • †Archaeolithothamnion keenanii – or unidentified related form
  • Archaeolithothamnium
    • †Archaeolithothamnium keenani – type locality for species
  • †Archaeoparadoxia
    • †Archaeoparadoxia weltoni – type locality for species
  • †Archibuteo
    • †Archibuteo ferrugineus
  • A living Architectonica staircase shell sea snail
    Architectonica
    • †Architectonica cognata
    • †Architectonica llajasensis – type locality for species
    • †Architectonica nobilis
    • †Architectonica tuberculata
    • †Architectonica ullreyana – or unidentified comparable form
  • †Archoheia – tentative report
  • Archoplites
    • †Archoplites interruptus
  • Arcinella
    • †Arcinella californica
  • Arctica – tentative report
    • †Arctica weaveri
  • Arctocephalus
  • Restoration of an Arctodus, or short-faced bear, with a human to scale
    †Arctodus
    • †Arctodus simus – type locality for species
  • †Arctostaphylos
  • Ardea
    • †Ardea herodias
  • Arenaria
    • †Arenaria melanocephala
  • Arene
    • †Arene mcleani – type locality for species
  • †Argenna
    • †Argenna fossilis – type locality for species
  • Argobuccinum
    • †Argobuccinum katherineae – type locality for species
    • †Argobuccinum oregonensis
  • Argopecten
  • †Argyrocetus – type locality for genus
    • †Argyrocetus bakersfieldensis – type locality for species
    • †Argyrocetus joaquinensis – type locality for species
  • A modern Argyropelecus silver hatchetfish
    Argyropelecus
    • †Argyropelecus bullocki – type locality for species
    • †Argyropelecus bullockii
  • †Arnoldina – type locality for genus
    • †Arnoldina iniistia – type locality for species
  • Arossia
  • †Artocarpus
    • †Artocarpus lessigiana
  • †Asclepiadites
    • †Asclepiadites laterita – type locality for species
  • A living Asio otus, or long-eared owl
    Asio
    • †Asio priscus
    • †Asio wilsonianus
  • Asterigerina
    • †Asterigerina crassaformis
  • Astraea
    • †Astraea biangulata – or unidentified comparable form
    • †Astraea gibbosa
    • †Astraea gradata
    • †Astraea morani – type locality for species
    • †Astraea undosa
  • Astrangia
    • †Astrangia grandis – type locality for species
    • †Astrangia insignifica – type locality for species
  • †Astrocoenia – tentative report
  • †Astrocoenta
  • †Astrodapsis
    • †Astrodapsis arnoldi – or unidentified comparable form
    • †Astrodapsis cuyamanus
    • †Astrodapsis fernandoensis
    • †Astrodapsis merriami – tentative report
    • †Astrodapsis spatiosus
  • †Astrodaspis
    • †Astrodaspis arnoldi
  • Astropecten
  • Astyris
    • †Astyris gausapata
  • Athene
    • †Athene cunicularia
  • Athleta
    • †Athleta roddai – type locality for species
  • Fossilized skull of the Miocene dolphin Atocetus
    †Atocetus
    • †Atocetus nasalis – type locality for species
  • †Atopotarus – type locality for genus
    • †Atopotarus courseni – type locality for species
  • Atrina
    • †Atrina alamedensis
  • †Aturia
    • †Aturia angustata
    • †Aturia dickersoni – type locality for species
    • †Aturia kerniana – type locality for species
    • †Aturia myrlae – type locality for species
  • †Aturoidea
    • †Aturoidea mathewsonii – type locality for species
  • Atys
  • Life restoration of the Miocene sperm whale Aulophyseter
    †Aulophyseter – type locality for genus
    • †Aulophyseter morricei – type locality for species
  • Austrotrophon
  • †Auxides
    • †Auxides sanctaemonicae
  • †Avipeda
  • Aythya
    • †Aythya affinis
    • †Aythya valisineria
  • †Azalois – type locality for genus
    • †Azalois angelensis – type locality for species

B
  • Baiomys
    • †Baiomys mowi
  • Balaenoptera
  • Mounted fossilized skeleton of the Pliocene whale Balaenula
    †Balaenula
  • Balanophyllia
  • Balanus
  • Balcis
    • †Balcis micans
    • †Balcis monicensis
    • †Balcis oldroydi
    • †Balcis rutila
    • †Balcis thersites
  • Bankia
    • †Bankia setacea – or unidentified comparable form
  • Barbarofusus
    • †Barbarofusus barbarensis
  • Barbatia
    • †Barbatia cliffensis
    • †Barbatia landesi – or unidentified related form
    • †Barbatia strongi – type locality for species
    • †Barbatia suzzalloi – or unidentified comparable form
  • Fossilized skull of the Miocene-Pliocene false saber-toothed cat Barbourofelis
    †Barbourofelis
    • †Barbourofelis loveorum
    • †Barbourofelis whitfordi
  • Barleeia
    • †Barleeia marmorea
  • Barnea
    • †Barnea costata
  • †Basirepomys
    • †Basirepomys pliocenicus – type locality for species
  • Bassariscus
    • †Bassariscus antiquus
    • †Bassariscus astutus – or unidentified comparable form
    • †Bassariscus casei
    • †Bassariscus raptor
  • †Bathylagus – type locality for genus
    • †Bathylagus quiescens – type locality for species
    • †Bathylagus quisquilia – type locality for species
  • †Bathysiphon
    • †Bathysiphon eocenica
    • †Bathysiphon sanctaecrucis
  • Bathytoma
  • †Batodonoides
    • †Batodonoides powayensis
    • †Batodonoides walshi – type locality for species
  • A living Bembidion ground beetle
    Bembidion
    • †Bembidion davidae – type locality for species
    • †Bembidion everestae – type locality for species
  • †Benoistia
    • †Benoistia cantonensis
  • †Bensonomys
    • †Bensonomys arizonae
    • †Bensonomys gidleyi
    • †Bensonomys meadensis
  • Beringraja
    • †Beringraja binoculata – or unidentified comparable form
  • †Bestiopeda
  • Betula
    • †Betula ashleyii
  • †Bifarina
    • †Bifarina eleganta
  • Bison
  • Bittium
    • †Bittium alternatum – or unidentified comparable form
    • †Bittium asperum
    • †Bittium casmaliense
    • †Bittium catalinense
    • †Bittium dumblei
    • †Bittium eschrichti
    • †Bittium eschrichtii
    • †Bittium inerfossa
    • †Bittium interfossa
    • †Bittium latum
    • †Bittium ornatissimum
    • †Bittium rugatum
    • †Bittium topangensis
  • Bivetopsia
    • †Bivetopsia bullata
  • †Boavus
    • †Boavus affinis – type locality for species
  • Boetica
    • †Boetica hertleini
  • Life restoration of the Miocene grenadier fish Bolbocara (bottom)
    †Bolbocara
    • †Bolbocara gyrinus
  • Bolinichthys
  • Bolivina
    • †Bolivina gracilis
  • Bonasa
    • †Bonasa umbellus
  • †Bonellitia
    • †Bonellitia paucivaricata
    • †Bonellitia stantoni
  • Bornia
    • †Bornia retifera
  • Restoration of two of the Miocene-Pliocene bone-crushing dog genus Borophagus preying on a camel. Jay Matternes (1964).
    †Borophagus
  • †Borophryne
  • †Bouromeryx
    • †Bouromeryx americanus
    • †Bouromeryx submilleri – or unidentified comparable form
  • Brachidontes
    • †Brachidontes cowlitzensis
    • †Brachidontes dichotomus
    • †Brachidontes lawsoni – or unidentified comparable form
    • †Brachidontes ornatus
  • Brachiodontes
    • †Brachiodontes lawsoni
  • †Brachisphingus
    • †Brachisphingus gabbi
  • †Brachyallodesmus – type locality for genus
    • †Brachyallodesmus packardi
  • Restorative portrait of the Miocene oreodont mammal Brachycrus
    †Brachycrus
    • †Brachycrus buwaldi
    • †Brachycrus laticeps
  • †Brachyerix
    • †Brachyerix incertis
  • †Brachypsalis
    • †Brachypsalis obliquidens
    • †Brachypsalis pachycephalus – or unidentified comparable form
  • Brachyramphus
    • †Brachyramphus dunkeli – type locality for species
    • †Brachyramphus pliocenum – type locality for species
  • †Brachysphingus
    • †Brachysphingus liratus
    • †Brachysphingus mammilatus – type locality for species
    • †Brachysphingus sinuatus
  • A living Branta bernicla, or black brant
    Branta
    • †Branta canadensis
    • †Branta nigricans – tentative report
    • †Branta woolfendeni – or unidentified comparable form
  • †Bretzia
  • †Brochopleurus – tentative report
  • †Bruclarkia
    • †Bruclarkia barkerianum
    • †Bruclarkia barkerium
    • †Bruclarkia columbiana
    • †Bruclarkia gravida
    • †Bruclarkia oregonensis – or unidentified comparable form
    • †Bruclarkia santacruzana
    • †Bruclarkia seattlensis
  • Bubo
    • †Bubo sinclairi – type locality for species
    • A living Bubo virginianus, or great horned owl
      †Bubo virginianus
  • Buccinum
  • Bucephala
    • †Bucephala albeola
  • †Bucida
    • †Bucida eocenica
  • Bufo
  • †Bulbiceps
    • †Bulbiceps raninus
  • †Bulbifusus
    • †Bulbifusus californicus – type locality for species
  • Bulimina
    • †Bulimina chirana
    • †Bulimina debilis
    • †Bulimina jacksonensis
    • †Bulimina ovata
    • †Bulimina ovula
    • †Bulimina rinconensis
    • †Bulimina socialis – or unidentified comparable form
  • Buliminella
    • †Buliminella curta
    • †Buliminella subfusiformis
  • Bulla
  • Bullia
    • †Bullia clarki
  • †Bullinula
    • †Bullinula subglobosa
  • †Bumelia
    • †Bumelia florissanti
  • Bursa
    • †Bursa califomica
  • Buteo
    • †Buteo borealis
    • A living Buteo jamaicensis, or red-tailed hawk
      †Buteo jamaicensis
    • †Buteo swainsoni

C
  • Cadulus
    • †Cadulus fusiformis
  • Caecum
    • †Caecum californicum
  • Calicantharus
    • †Calicantharus dalli
    • †Calicantharus fortis
    • †Calicantharus humerosus
    • †Calicantharus portolaensis – or unidentified comparable form
  • †Calicovatellus – type locality for genus
    • †Calicovatellus petrodytes – type locality for species
  • Calidris
    • †Calidris alba
  • Californiconus
  • †Calilampas
    • †Calilampas californiensis
  • †Calipepla
    • †Calipepla californica
  • Calliostoma
  • Callista
    • †Callista domenginica
    • †Callista vokesi
  • Callistochiton
    • †Callistochiton palmulatus
  • Callithaca
    • †Callithaca tenerrima
  • Callorhinus
    • †Callorhinus gilmorei – type locality for species
    • A living Callorhinus ursinus, or northern fur seal
      †Callorhinus ursinus
  • Calopsectra
  • †Calorebama
    • †Calorebama inornata
  • †Calorhadia – tentative report
  • Calosoma
  • †Calycites
    • †Calycites mikanoides
  • Three modern shells of Calyptraea, or Chinese hat snails
    Calyptraea
    • †Calyptraea calabasasensis
    • †Calyptraea contorta
    • †Calyptraea costellata
    • †Calyptraea dalliana
    • †Calyptraea diegoana
    • †Calyptraea excentrica
    • †Calyptraea fastigiata
    • †Calyptraea filosa
    • †Calyptraea inornata
    • †Calyptraea mamillaris
    • †Calyptraea mammilaris – or unidentified comparable form
  • †Calyptranthes
    • †Calyptranthes myrtifolia – type locality for species
  • Life restoration of the Pliocene-Holocene camel Camelops
    †Camelops
    • †Camelops hesternus
    • †Camelops minidokae
  • Campanile
    • †Campanile dilloni
  • Camponotus – type locality for genus
  • †Canarium
    • †Canarium californicum
  • Cancellaria
    • †Cancellaria arnoldi
    • †Cancellaria dalliana
    • †Cancellaria fernandoensis
    • †Cancellaria obesa
    • †Cancellaria planospira
    • †Cancellaria posunculensis
    • †Cancellaria subtuberosa
    • †Cancellaria tritonidea
  • Cancer
  • Cancris
    • †Cancris mexicanus
  • Canis
    • Modern mounted skeleton of Canis lupus, the grey wolf, to scale with a fossilized skeleton of the Pleistocene wolf Canis dirus, or dire wolf
      †Canis dirus
    • †Canis edwardii
    • †Canis latrans
    • †Canis lepophagus
    • †Canis lupus
    • †Canis rufus
  • Canthon
  • †Cantius
    • †Cantius actius
  • †Capricamelus – type locality for genus
    • †Capricamelus gettyi – type locality for species
  • †Capromeryx
  • Caracara
    • †Caracara cheriway
    • †Caracara plancus
  • Carcharhinus
  • Carcharias
    • †Carcharias clavatus
  • †Carcharinus
  • Carcharodon
    • †Carcharodon arnoldi
    • †Carcharodon carcharias
    • †Carcharodon hastalis
    • †Carcharodon leviathan
    • †Carcharodon morricei
    • †Carcharodon sulcidens
    • †Carcharodon tembloris – type locality for species
  • Cardium
    • †Cardium breweri
  • Carpelimus
  • †Carpites
    • †Carpites egregia
  • †Carpocyon
    • †Carpocyon robustus
  • A living Carya, or hickory tree
    Carya
    • †Carya bendirei
    • †Carya sessilis
  • Caryophyllia
    • †Caryophyllia arnoldi
    • †Caryophyllia californica – type locality for species
    • †Caryophyllia capayensis – type locality for species
    • †Caryophyllia pedroensis – type locality for species
  • Cassidulina
    • †Cassidulina crassipunctata
    • †Cassidulina diversa – or unidentified comparable form
    • †Cassidulina globosa
  • Castanea
    • †Castanea spokanensis
  • Castanopsis
    • †Castanopsis longipetiolatum
  • Castor
  • †Catharista
    • †Catharista shastensis – type locality for species
  • Cathartes
    • A living Cathartes aura, or turkey vulture
      †Cathartes aura
  • Catoptrophorus
    • †Catoptrophorus semipalmatus
  • †Catoptrophus
    • †Catoptrophus inornatus
  • †Catostomus
    • †Catostomus occidentalis
  • Ceanothus
    • †Ceanothus tuolumnensis
    • †Ceanothus turlockensis
  • Cedrela
    • †Cedrela eolancifolia – type locality for species
    • †Cedrela trainii
  • †Celastrus
    • †Celastrus preangulata – type locality for species
  • Celtis
    • †Celtis kansana
  • †Centetodon
    • †Centetodon aztecus
    • †Centetodon bembicophagus – or unidentified comparable form
    • †Centetodon magnus – or unidentified comparable form
  • Centrifuga
    • †Centrifuga leeana
  • Cepphus
    • A living Cepphus columba, or pigeon guillemot
      †Cepphus columba
    • †Cepphus olsoni – type locality for species
  • Cercidiphyllum
    • †Cercidiphyllum elongatum
  • †Cercocarpus
    • †Cercocarpus nevadensis
  • Cerithidea
    • †Cerithidea californica
  • Cerithiopsis
    • †Cerithiopsis antefilosa
    • †Cerithiopsis carpenteri
    • †Cerithiopsis columna – or unidentified comparable form
    • †Cerithiopsis cosmia
    • †Cerithiopsis halia – or unidentified related form
    • †Cerithiopsis paramoea
    • †Cerithiopsis pedroana
    • †Cerithiopsis rowelli
    • †Cerithiopsis stejnegeri – or unidentified comparable form
  • Cerithium
    • †Cerithium incisum
    • †Cerithium topangensis
  • †Cernictis
    • †Cernictis hesperus – type locality for species
  • †Cernina
    • †Cernina hannibali
  • †Cerorhinca
    • †Cerorhinca dubia – type locality for species
    • †Cerorhinca reai – type locality for species
  • Cervus
    • †Cervus elaphus
  • Cetorhinus
    • †Cetorhinus maximus
  • Life restoration of the Miocene-Pliocene whale Cetotherium
    †Cetotherium
    • †Cetotherium furlongi – type locality for species
  • †Chaceia
    • †Chaceia fulcherae – type locality for species
  • †Chaenophryne
    • †Chaenophryne melanorhabdus
  • Chaetodipus
    • †Chaetodipus formosus – or unidentified comparable form
  • †Chaetoptelea
    • †Chaetoptelea pseudofulva
  • †Chalcidichthys – type locality for genus
    • †Chalcidichthys malacopterygius – type locality for species
  • Chama
    • †Chama arcana
    • †Chama frondosa
    • †Chama grunski
  • †Chamaecyparis
    • †Chamaecyparis cordillerae
  • Charadrius
    • †Charadrius semipalmatus
  • Close-up portrait of a Chauliodus, or viperfish
    Chauliodus – type locality for genus
    • †Chauliodus eximias
    • †Chauliodus eximius – type locality for species
  • †Chedevillia
    • †Chedevillia saltonensis – type locality for species
    • †Chedevillia stewarti – type locality for species
  • Chelonia
    • †Chelonia californiensis – type locality for species
  • Chen
    • †Chen caerulescens
  • Life restoration of the Pleistocene-Holocene Chendytes, or Law's diving-goose
    †Chendytes – type locality for genus
    • †Chendytes lawi – type locality for species
  • Chilostomella
    • †Chilostomella hadleyi
  • †Chilostomelloides
    • †Chilostomelloides ovicula
    • †Chilostomelloides oviformis
  • Chione
    • †Chione californiensis
    • †Chione cryptolineata – or unidentified comparable form
    • †Chione latilaminosa
    • †Chione lineolata – or unidentified comparable form
    • †Chione panzana
    • †Chione schencki
    • †Chione securis
    • †Chione undatella
  • Chionista
    • †Chionista fluctifraga
  • Chionopsis
    • †Chionopsis gnidia
    • †Chionopsis richthofeni
    • †Chionopsis temblorensis
  • Chlamys
    • †Chlamys bartschi
    • †Chlamys branneri – or unidentified comparable form
    • †Chlamys corteziana – or unidentified comparable form
    • A living Chlamys hastata, or spear scallop
      †Chlamys hastata
    • †Chlamys hertleini
    • †Chlamys mediacostatus – type locality for species
    • †Chlamys rubida
    • †Chlamys sespeensis
    • †Chlamys swifti
  • Chlorostoma
    • †Chlorostoma gallina
  • †Chorizanthe
  • †Chrisodomus
  • †Chrysobalanus
    • †Chrysobalanus eoicaco
  • A living Chrysocyon brachyurus, or maned wolf
    †Chrysocyon
    • †Chrysocyon nearcticus
  • †Chrysodomus – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Chrysodomus martini
  • †Chrysolepis
    • †Chrysolepis sonomensis
  • †Chumashius
    • †Chumashius balchi – type locality for species
  • Cibicides
    • †Cibicides cushmani
    • †Cibicides martinezensis
    • †Cibicides pseudoungerianus
  • Cibicidoides
    • †Cibicidoides midwayensis – or unidentified comparable form
  • Cicindela
  • Cidaris
    • †Cidaris martinezensis
  • A living Cinnamomum, or cinnamon tree
    Cinnamomum
    • †Cinnamomum acrodromum
    • †Cinnamomum dilleri
  • Cissus
    • †Cissus pyriformis
  • †Citellus
    • †Citellus bensoni
  • Citharichthys
  • †Claibornites
    • †Claibornites diegoensis
    • †Claibornites muirensis
    • †Claibornites turneri
  • Shells in multiple orientations of Clathrodrillia sea snails
    Clathrodrillia
    • †Clathrodrillia coalingensis
  • Clathurella
    • †Clathurella conradiana
  • Clavilithes
    • †Clavilithes tabulatus
  • Clavus
    • †Clavus hartleyensis – type locality for species
    • †Clavus hemphilli
    • †Clavus pallidus – or unidentified related form
    • †Clavus temblorensis
  • Clementia
    • †Clementia brioniana
    • †Clementia conradiana
    • †Clementia pertenius
    • †Clementia pertenuis
  • Cletocamptus
  • Shell of a Clinocardium cockle
    Clinocardium
  • Cliona
  • Clupea
    • †Clupea hadleyi – type locality for species
    • †Clupea tiejei – type locality for species
  • Clypeaster
    • †Clypeaster bowersi
    • †Clypeaster carrizoensis – type locality for species
    • †Clypeaster deserti
  • A living Cnemidophorus, or whip-tail lizard
    Cnemidophorus
  • †Coalingodea
    • †Coalingodea tuberculiformis
  • Coccodentalium
    • †Coccodentalium emersoni – type locality for species
  • †Cocconeis
    • †Cocconeis disculus
    • †Cocconeis placentula
  • †Cochlespiropsis – tentative report
    • †Cochlespiropsis jenkinsi – type locality for species
  • Cochliomyia – type locality for genus
  • Shell of a Codakia marine bivalve
    Codakia
  • Colaptes
    • †Colaptes cafer
  • †Colodon
  • Coluber
    • †Coluber constrictor
  • Colubraria
  • Columba – or unidentified comparable form
    • †Columba fasciata
  • Columbarium
  • Colymbus
    • †Colymbus nigricollis
    • †Colymbus parvus
    • †Colymbus subparvus – type locality for species
  • Compsomyax
    • †Compsomyax subdiaphana
  • Shell in two views of a Conasprelloides cone sea snail
    †Conasprelloides
    • †Conasprelloides planiliratus
  • Concavus
    • †Concavus concavus
  • †Conchocele
    • †Conchocele bisecta
  • Coniontis
    • †Coniontis abdominalis – type locality for species
    • †Coniontis elliptica
    • †Coniontis lamentabilis
    • †Coniontis puncticollis
    • †Coniontis remnans – type locality for species
    • †Coniontis robusta
    • †Coniontis rugosa
  • Conus
  • Cooperella
    • †Cooperella subdiaphana
  • †Copemys
    • †Copemys barstowensis – type locality for species
    • †Copemys esmeraldensis
    • †Copemys longidens – type locality for species
    • †Copemys pagei
    • †Copemys russelli
    • †Copemys tenuis – type locality for species
  • †Cophocara
    • †Cophocara stantoni
  • †Cophocetus – tentative report
  • A living Copris scarab
    Copris
    • †Copris pristinus – type locality for species
  • Coragyps
  • Coralliophaga
  • Corbicula
    • †Corbicula dumblei
  • Corbula
    • †Corbula diaboli – type locality for species
    • †Corbula dickersoni
    • †Corbula dilatata
    • †Corbula fragilis
    • †Corbula hornii – or unidentified comparable form
    • †Corbula parilis
    • †Corbula tomulata – or unidentified comparable form
  • Fossilized skeleton preserved in situ (upper left, 2) of the Miocene-Pliocene horse Cormohipparion
    †Cormohipparion
    • †Cormohipparion occidentale – or unidentified comparable form
  • Cornus
    • †Cornus kelloggii
    • †Cornus ovalis – or unidentified comparable form
  • †Coronadus – type locality for genus
    • †Coronadus agilis – type locality for species
  • Coronula – tentative report
  • Corvus
    • †Corvus brachyrhynchos
    • †Corvus corax
  • †Cosomys
    • †Cosomys primus – type locality for species
  • †Cosoryx
    • †Cosoryx cerroensis – or unidentified comparable form
  • Costacallista
    • †Costacallista hornii – or unidentified comparable form
  • Restoration of the Miocene palaeomerycid Cranioceras, a relative of modern deer, with anachronistic human to scale
    †Cranioceras
    • †Cranioceras teres
    • †Cranioceras unicornis – or unidentified comparable form
  • †Craseops
    • †Craseops sylvestris – type locality for species
  • Crassadoma
    • †Crassadoma gigantea
  • Crassatella
    • †Crassatella – type locality for species A informal
    • †Crassatella claytonensis
    • †Crassatella compacta
    • †Crassatella granti
    • †Crassatella meganosensis – type locality for species
    • †Crassatella unioides
    • †Crassatella uvasana
    • †Crassatella washingtonensis
  • Crassinella
    • †Crassinella nuculiformis
    • †Crassinella pacifica
  • Shell of a Crassispira sea snail
    Crassispira
  • Crassostrea
    • †Crassostrea ashleyi
    • †Crassostrea titan
    • †Crassostrea vaquerosensis
  • Crataegus
    • †Crataegus pacifica
  • Crawfordina
    • †Crawfordina weaveri
  • †Crenaturricula
    • †Crenaturricula crenatospira
  • Crepidula
    • †Crepidula adunca
    • †Crepidula coei – or unidentified comparable form
    • †Crepidula diminutiva – type locality for species
    • †Crepidula excavata
    • †Crepidula lessoni
    • †Crepidula nummaria
    • †Crepidula nunimaria
    • Shell in multiple views of a Crepidula onyx, or onyx slipper sea snail
      †Crepidula onyx
    • †Crepidula pileum – or unidentified comparable form
    • †Crepidula praerupta
    • †Crepidula princeps
    • †Crepidula ungana – or unidentified comparable form
  • Crepipatella
  • †Crommium
    • †Crommium andersoni
    • †Crommium pinyonensis
  • Crossata
  • Crotalus
  • Crucibulum
  • †Crypholestes
    • †Crypholestes vaughni
  • †Cryptocarya
    • †Cryptocarya praesamarensis
  • †Cryptoconus
    • †Cryptoconus cooperi
  • Cryptomya
    • †Cryptomya californica
  • Cryptonatica
  • A living Cryptotermes, or drywood termite
    Cryptotermes
    • †Cryptotermes ryshkoffi – type locality for species
  • Cryptotis
  • Ctenocardia
    • †Ctenocardia biangulata
  • Cucullaea
    • †Cucullaea mathewsoni
    • †Cucullaea mathewsonii
  • Culicoides
    • †Culicoides carri – type locality for species
    • †Culicoides fossilis – type locality for species
    • †Culicoides laurae – type locality for species
    • †Culicoides megacanthus – type locality for species
    • †Culicoides mioceneus – type locality for species
  • Cumingia
    • †Cumingia lamellosa
  • †Cunnolites – tentative report
  • †Cupania
    • †Cupania oregona
  • †Cupidinimus
    • †Cupidinimus avawatzensis
    • †Cupidinimus bidahochiensis – or unidentified comparable form
    • †Cupidinimus boronensis – type locality for species
    • †Cupidinimus halli
    • †Cupidinimus lindsayi – type locality for species
    • †Cupidinimus tertius
  • A living Cupressus, or cypress tree
    †Cupressus
  • Cuspidaria
    • †Cuspidaria hannibali
  • †Cuyamacamelus
    • †Cuyamacamelus jamesi
  • †Cuyamalagus
    • †Cuyamalagus dawsoni – type locality for species
  • Cyanocitta
    • †Cyanocitta stelleri
  • Cybocephalus
  • Cyclammina
    • †Cyclammina clarki
    • †Cyclammina incisa – or unidentified comparable form
  • Cyclinella
  • Cyclocardia
    • †Cyclocardia californica
    • †Cyclocardia montereyana – type locality for species
    • †Cyclocardia ventricosa
  • †Cyclocorystes
    • †Cyclocorystes aldersoni – type locality for species
  • †Cyclosthone – or unidentified comparable form
  • Illustration of a living Cyclothone bristlemouth
    Cyclothone
  • Cygnus
    • †Cygnus columbianus
  • Cylichna
    • †Cylichna attonsa
  • Cylichnella
    • †Cylichnella attonsa
    • †Cylichnella culcitella
  • Cymatium
    • †Cymatium elsemerense
    • †Cymatium janetae – type locality for species
  • Cymatogaster
    • †Cymatogaster aggregata
  • †Cymbophora
  • †Cynarctoides
    • †Cynarctoides acridens
    • †Cynarctoides whistleri – type locality for species
  • †Cynarctus
    • †Cynarctus galushai – type locality for species
  • Fossilized cranium of the Miocene bear-dog Cynelos
    †Cynelos
    • †Cynelos malasi – type locality for species
    • †Cynelos sinapius – or unidentified comparable form
  • †Cynorca
    • †Cynorca occidentale
  • Cynoscion
    • †Cynoscion eprepes
  • Cyperus
  • Cypraea
  • Cyrena
    • †Cyrena dumblei
    • †Cyrena studleyi – or unidentified comparable form
  • Illustration of a living Cyrtonyx quail
    Cyrtonyx
    • †Cyrtonyx tedfordi – type locality for species
  • Cystiscus
    • †Cystiscus subtrigona
  • Cythara
    • †Cythara cetolaca
    • †Cythara hecetae
    • †Cythara interlirata
  • Cytherea
    • †Cytherea mathewsoni

D
  • †Dalbergia
    • †Dalbergia rubra – type locality for species
  • Dallocardia
    • †Dallocardia quadragenarium
  • Damalichthys
    • †Damalichthys vacca
  • †Daphoenodon – or unidentified comparable form
  • Mounted fossilized skeleton of the Eocene-Miocene bear-dog Daphoenus
    †Daphoenus
    • †Daphoenus ruber – type locality for species
  • †Darbyella
  • Dardanus
  • †Dasceles – type locality for genus
    • †Dasceles dassurus – type locality for species
  • Dasyatis
    • †Dasyatis dipterus
  • Dasyhelea
    • †Dasyhelea antiqua
    • †Dasyhelea browneae – type locality for species
    • †Dasyhelea dara – type locality for species
    • †Dasyhelea judithae – type locality for species
    • †Dasyhelea kanakoffi – type locality for species
    • †Dasyhelea stenoceras – type locality for species
  • A school of living Decapterus, or mackerel scads
    †Decapterus
    • †Decapterus hopkinsi
  • Delectopecten
    • †Delectopecten lillisi
    • †Delectopecten peckhami
  • †Delphinavus – type locality for genus
    • †Delphinavus newhalli – type locality for species
  • †Delphinodon – or unidentified comparable form
    • †Delphinodon dividum
  • Deltochilum – tentative report
  • Deltocyathus
    • †Deltocyathus whitei – type locality for species
  • Dendostrea
    • †Dendostrea vespertina
  • Dendragapus
    • †Dendragapus fuliginosus
    • A living Dendragapus obscurus, or dusky grouse
      †Dendragapus obscurus
  • Dendraster
    • †Dendraster coalingaensis – or unidentified comparable form
    • †Dendraster excentricus
    • †Dendraster gibbsi
  • Dendrophyllia
    • †Dendrophyllia californiana – type locality for species
    • †Dendrophyllia oldroydi – tentative report
    • †Dendrophyllia tejonensis – type locality for species
  • A living Dendryphantes jumping spider
    Dendryphantes
  • Dentalina
    • †Dentalina approximata
    • †Dentalina consobrina
    • †Dentalina cooperensis
    • †Dentalina jarvisi
    • †Dentalina legumen – or unidentified comparable form
    • †Dentalina nasuta
    • †Dentalina pauperata
    • †Dentalina quadrulata
    • †Dentalina spinosa
  • Dentalium
    • †Dentalium conradi
    • †Dentalium cooperi
    • †Dentalium laneensis
    • †Dentalium mcganna – type locality for species[1]
    • †Dentalium neohexagonum
    • †Dentalium radiolineata – or unidentified comparable form
    • †Dentalium rectius
    • †Dentalium stentor
    • †Dentalium stramineum
  • A living Dermochelys, or leatherback sea turtle
    Dermochelys – or unidentified related form
  • Deroceras
  • †Derrhias – type locality for genus
    • †Derrhias enantius – type locality for species
  • †Desmathyus – or unidentified related form
  • †Desmatippus
    • †Desmatippus avus
  • †Desmatochoerus
    • †Desmatochoerus hesperus
  • †Desmocyon
    • †Desmocyon thomsoni
  • †Desmodium
    • †Desmodium indentum – type locality for species
  • Life restoration of the Oligocene-Miocene herbivorous marine mammal Desmostylus
    †Desmostylus
    • †Desmostylus hesperus – type locality for species
  • Diacria
    • †Diacria trispinosa
  • Diaphana
    • †Diaphana brunnea
  • †Diceratherium
  • Dichocoenia
    • †Dichocoenia merriami
  • †Dinohippus
    • †Dinohippus interpolatus
    • †Dinohippus leardi
    • †Dinohippus leidyanus
    • †Dinohippus mexicanus
  • †Dinohyus
    • †Dinohyus hollandi
  • Diodora
  • †Diomeda
  • Diomedea
    • †Diomedea milleri – type locality for species
  • †Diomedia
    • †Diomedia albatrus
    • †Diomedia nigripes
  • †Dioplotherium
    • †Dioplotherium allisoni
  • A living member of Diospyros, the tree genus including ebonies and persimmons
    †Diospyros
    • †Diospyros oregoniana
    • †Diospyros retinervis
  • Diplodonta
    • †Diplodonta buwaldana
    • †Diplodonta cretacea
    • †Diplodonta orbella
    • †Diplodonta pariiis
    • †Diplodonta parilis
    • †Diplodonta sericata
  • Diploria
    • †Diploria bowersi – type locality for species
  • Dipodomys
    • †Dipodomys agilis – or unidentified comparable form
    • †Dipodomys compactus
    • †Dipodomys deserti – or unidentified comparable form
    • †Dipodomys heermanni – or unidentified comparable form
    • †Dipodomys hibbardi
    • A living Dipodomys merriami, or Merriam's kangaroo rat
      †Dipodomys merriami
    • †Dipodomys minor
    • †Dipodomys ordii
  • †Dipoides
    • †Dipoides vallicula
  • †Diprionomys
    • †Diprionomys parvus – or unidentified comparable form
  • Discammina – tentative report
    • †Discammina eocenica
  • Discinisca
    • †Discinisca cumingi
  • Fossilized shell of a Discohelix sea snail
    †Discohelix
    • †Discohelix californicus
  • †Dissacus
  • Distorsio
  • Divalinga
    • †Divalinga eburnea
  • Divaricella
    • †Divaricella cumulata
  • †Domnina
  • †Domninoides
  • Donax
  • †Dorothia
    • †Dorothia californica
  • Dosinia
    • †Dosinia conradi
    • †Dosinia dunkeri
    • †Dosinia jacalitosana
    • †Dosinia margaritana
    • †Dosinia mathewsoni
    • †Dosinia mathewsonii
    • †Dosinia merriami
    • †Dosinia milthoidea – tentative report
    • †Dosinia ponderosa
    • †Dosinia santana – type locality for species
    • †Dosinia semiobliterata – or unidentified comparable form
    • †Dosinia whitneyi
  • †Dosiniopsis
    • †Dosiniopsis stewartvillensis – type locality for species
  • †Drimys – type locality for genus
    • †Drimys defensor – type locality for species
  • †Dromomeryx
  • †Duchesneodus
    • †Duchesneodus uintensis
  • †Dusignathus – type locality for genus
    • †Dusignathus santacruzensis – type locality for species
    • †Dusignathus seftoni – type locality for species
  • Life restoration of the Miocene-Pliocene manatee relative Dusisiren
    †Dusisiren
    • †Dusisiren dewana
    • †Dusisiren jordani – type locality for species
  • †Dyseohyus – type locality for genus
    • †Dyseohyus fricki – type locality for species
  • †Dyseolemur
    • †Dyseolemur pacificus – type locality for species
  • Dytiscus

E
  • Echinarachnius
    • †Echinarachnius fairbanksi
  • Illustration of a living Echinorhinus shark
    Echinorhinus
    • †Echinorhinus blakei
  • Eclipes – type locality for genus
    • †Eclipes extensus
    • †Eclipes manni
    • †Eclipes santamonicae – type locality for species
    • †Eclipes veternus – type locality for species
  • †Ectasis – type locality for genus
    • †Ectasis proriger – type locality for species
  • †Ectinochilus
    • †Ectinochilus macilentus
  • †Ectopistes
    • Taxidermied male Ectopistes migratorius, or passenger pigeon
      †Ectopistes migratorius
  • Eleodes
    • †Eleodes acuticaudus
    • †Eleodes giganteus
    • †Eleodes gracilis
    • †Eleodes grandicollis – type locality for species
    • †Eleodes laticollis
    • †Eleodes omissus
    • †Eleodes osculans – type locality for species
  • Elgaria
    • †Elgaria multicarinata
  • †Ellimma
    • †Ellimma barbarae – type locality for species
    • †Ellimma elmodenae – type locality for species
  • †Ellipsonodosaria
    • †Ellipsonodosaria alexanderi – or unidentified comparable form
    • †Ellipsonodosaria atlantisae
    • †Ellipsonodosaria recta
    • †Ellipsonodosaria spinulosa
  • Elliptotellina
    • †Elliptotellina townsendensis – or unidentified comparable form
  • Life restoration of two of the Eocene-Oligocene anthracothere mammal Elomeryx being menaced by fellow-anthracothere Anthracotherium
    †Elomeryx
    • †Elomeryx armatus
  • †Emmachaere – type locality for genus
    • †Emmachaere rhachites – type locality for species
    • †Emmachaere rhomalea
  • †Enaliarctos
    • †Enaliarctos mealsi
    • †Enaliarctos mitchelli
  • †Enallagma – type locality for genus
    • †Enallagma kirkbyae – type locality for species
  • Encope
    • †Encope tenuis – type locality for species
  • Engelhardtia
    • †Engelhardtia nevadensis
  • Engina
    • †Engina strongi
  • †Engraulites – type locality for genus
    • †Engraulites remifer – type locality for species
  • Enhydra
    • A living Enhydra lutris, or sea otter
      †Enhydra lutris
    • †Enhydra macrodonta – type locality for species
  • †Enhydritherium
  • Ensis
    • †Ensis myrae
  • Entomobrya
  • †Eocernia
    • †Eocernia hannibali
  • †Eocypraea
    • †Eocypraea castacensis – or unidentified comparable form
    • †Eocypraea maniobraensis – type locality for species
  • †Eogryphus
    • †Eogryphus tolmani – or unidentified comparable form
  • †Eohaplomys
    • †Eohaplomys matutinus – type locality for species
    • †Eohaplomys serus – type locality for species
    • †Eohaplomys tradux – type locality for species
  • †Eomellivora
    • †Eomellivora wimani – or unidentified comparable form
  • Fossilized skeleton of the Eocene-Pliocene frog Eopelobates
    †Eopelobates
  • †Eopleurotoma
    • †Eopleurotoma whitakerpeakensis – type locality for species
  • †Eoscorpius – type locality for genus
    • †Eoscorpius primaevus – type locality for species
  • †Eosurcula
    • †Eosurcula inconstans – or unidentified related form
  • †Eotaria – type locality for genus
    • †Eotaria citrica – type locality for species
    • †Eotaria crypta – type locality for species
  • †Eotibia
    • †Eotibia llajasensis – type locality for species
  • †Eotylopus
  • †Epelichthys – type locality for genus
    • †Epelichthys michaelis – type locality for species
  • Mounted fossilized skeleton of the Miocene bone-crushing dog Epicyon
    †Epicyon
    • †Epicyon haydeni
    • †Epicyon saevus
  • †Epihippus
  • Epilucina
  • Epinephelus
  • †Epiphragmophora
    • †Epiphragmophora mormonum
  • †Epistomina
    • †Epistomina eocenica
  • Shell of an Epitonium wentletrap sea snail
    Epitonium
    • †Epitonium bellastriata
    • †Epitonium bellastriatum
    • †Epitonium clarki
    • †Epitonium condoni
    • †Epitonium cookii – or unidentified related form
    • †Epitonium cooperi
    • †Epitonium indianorum
    • †Epitonium insculptum
    • †Epitonium rugiferum – or unidentified comparable form
    • †Epitonium sawinae
  • Eponides
    • †Eponides keenani
    • †Eponides kleinpelli
    • †Eponides lodoensis
    • †Eponides umbonatus
  • Eptesicus
    • †Eptesicus fuscus – or unidentified comparable form
  • †Equisetum
  • Equus
    • †Equus conversidens
    • †Equus enormis
    • †Equus idahoensis
    • †Equus pacificus
    • †Equus scotti
    • Fossilized skeleton of the Pliocene-Pleistocene horse Equus simplicidens, also known as the Hagerman horse or American zebra
      †Equus simplicidens
  • Eremophila
    • †Eremophila alpestris
  • Erethizon
    • †Erethizon bathygnathum
    • †Erethizon cascoensis – type locality for species
    • †Erethizon dorsatum
  • †Eriquius
    • †Eriquius plectrodes
  • †Erisceles – type locality for genus
    • †Erisceles pristinus – type locality for species
  • †Eritima
    • †Eritima evides – type locality for species
  • †Escharion – type locality for genus
    • †Escharion townleyi – type locality for species
  • Eschrichtius
    • †Eschrichtius robustus – or unidentified comparable form
  • †Etringus
    • †Etringus scintillans
  • Eubalaena – or unidentified comparable form
  • †Eucastor
  • Life restoration of the Pleistocene bovid Euceratherium, or the shrub ox. Robert Bruce Horsfall (1913).
    †Euceratherium – type locality for genus
    • †Euceratherium collinum – type locality for species
  • Eucrassatella
    • †Eucrassatella semidentata
    • †Eucrassatella subgibbosus – type locality for species
  • †Eucyon
    • †Eucyon davisi
  • Euleptorhamphus
    • †Euleptorhamphus peronides
  • Eumetopias
    • †Eumetopias jubata
  • †Euoplocyon
    • †Euoplocyon brachygnathus
  • Eupatagus
    • †Eupatagus stevensi
  • Euphagus
    • †Euphagus cyanocephalus
  • Eurytellina
    • †Eurytellina lorenzoensis
  • Euscelis
    • †Euscelis palmeri – type locality for species
  • A living Eusmilia stony coral
    Eusmilia
    • †Eusmilia carrizensis – type locality for species
  • Euspira
    • †Euspira gesteri
    • †Euspira hornii
    • †Euspira lewisii
    • †Euspira muriciformis
    • †Euspira nuciformis
  • †Euspirocromium
    • †Euspirocromium martinezensis
  • †Euspirocrommium
    • †Euspirocrommium martinezensis
  • A living Eutamias chipmunk
    Eutamias
  • †Eutrephoceras
    • †Eutrephoceras hallidayi
    • †Eutrephoceras hannai
    • †Eutrephoceras marksi
    • †Eutrephoceras stephensoni – type locality for species
  • Euvola
    • †Euvola keepi
    • †Euvola vogdesi
  • †Evesthes
    • †Evesthes jordani
  • †Exaeretoptera – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Exaeretoptera fosteri – type locality for species
  • †Exilia
    • †Exilia fausta
    • †Exilia talliaferroi – or unidentified comparable form

F
  • Falco
    • †Falco peregrinus
    • A living Falco sparverius, or American kestrel
      †Falco sparverius
  • Falsifusus
  • Farrea
    • †Farrea rugosa – type locality for species
  • Fartulum
    • †Fartulum hemphilli
    • †Fartulum occidentale
  • Felaniella
    • †Felaniella harfordi
  • Felis
    • †Felis lacustris
    • †Felis rexroadensis
  • †Ficopsis
    • †Ficopsis cooperiana
    • †Ficopsis crescentensis
    • †Ficopsis horni
    • †Ficopsis meganosensis – type locality for species
    • †Ficopsis redmondii
    • †Ficopsis remondi
    • †Ficopsis remondii
  • A living Ficus, or fig tree
    Ficus
    • †Ficus decussata
    • †Ficus densifolia
    • †Ficus gesteri
    • †Ficus goshenensis
    • †Ficus modesta – or unidentified comparable form
    • †Ficus nodiferum
    • †Ficus ocoyana
    • †Ficus pyriformis
  • Fimbria
    • †Fimbria pacifica
    • †Fimbria susanensis – type locality for species
  • Fissurella
  • Fossilized shell of the Oligocen-modern scallop Flabellipecten
    Flabellipecten
    • †Flabellipecten carrizoensis
    • †Flabellipecten stearnsii
  • Flabellum
    • †Flabellum californicum
    • †Flabellum clarki – type locality for species
    • †Flabellum cuneiforme
    • †Flabellum stantoni
  • †Forestiera
    • †Forestiera buchananensis
  • †Forfex – type locality for genus
    • †Forfex hypuralis – type locality for species
  • Forreria
    • †Forreria belchei
    • †Forreria belcheri
    • †Forreria carisaensis
    • †Forreria coalingensis
  • †Fragilaria
    • †Fragilaria brevistriata
    • †Fragilaria construens
    • †Fragilaria pinnata
  • Fratercula
    • A living Fratercula cirrhata, or tufted puffin
      †Fratercula cirrhata
    • †Fratercula dowi – type locality for species
  • †Fraxinus
    • †Fraxinus yubaensis – type locality for species
  • Frondicularia
    • †Frondicularia tenuissima
  • Fulgoraria
    • †Fulgoraria prevostiana
    • †Fulgoraria zinsmeisteri – type locality for species
  • †Fulica
    • †Fulica americana
  • Fulmarus
    • †Fulmarus glacialis
    • †Fulmarus griseus
    • †Fulmarus hammeri – type locality for species
    • †Fulmarus miocaenus – type locality for species
  • Fusimitra – tentative report
    • †Fusimitra simplicissima – or unidentified comparable form
  • Fusinus
    • †Fusinus barbarensis
    • †Fusinus calabasensis
    • †Fusinus chehalisensis – or unidentified comparable form
    • †Fusinus hecoxi
    • †Fusinus lincolnensis – or unidentified related form
    • †Fusinus luteopictus
    • †Fusinus meganosensis – type locality for species
    • †Fusinus merriami – or unidentified related form
    • †Fusinus simiensis

G
  • A living Galeocerdo cuvier, or tiger shark
    Galeocerdo
    • †Galeocerdo aduncus
    • †Galeocerdo medius
  • Galeodea
    • †Galeodea calfornica
    • †Galeodea carinata – or unidentified related form
    • †Galeodea meganosensis
    • †Galeodea petersoni – or unidentified related form
    • †Galeodea susanae
    • †Galeodea sutterensis
  • A living Galeorhinus galeus school shark
    Galeorhinus
    • †Galeorhinus hannibali
    • †Galeorhinus latus – or unidentified comparable form
    • †Galeorhinus zopterus
  • †Ganolytes
    • †Ganolytes aratus
    • †Ganolytes cameo
    • †Ganolytes clepsydra – type locality for species
  • Gari
    • †Gari californica
    • †Gari diegoensis – or unidentified comparable form
    • †Gari furcata
    • †Gari hornii
    • †Gari texta
  • †Gasterosternus
    • †Gasterosternus aculeatus
  • Gasterosteus
    • A school of living Gasterosteus aculeatus, or three-spined stickleback
      †Gasterosteus aculeatus
  • Gastrochaena
    • †Gastrochaena dubitata – tentative report
  • Gaudryina
    • †Gaudryina laevigata
    • †Gaudryina triangularis – or unidentified comparable form
  • Gavia
    • †Gavia arctica
    • †Gavia brodkorbi – type locality for species
    • †Gavia concinna
    • †Gavia howardae – type locality for species
    • †Gavia immer
    • †Gavia pacifica
    • Living adult and young Gavia stellata, or red-throated loon
      †Gavia stellata
  • †Gemelliporella – tentative report
    • †Gemelliporella punctata – or unidentified related form
  • Gemmula
    • †Gemmula diabloensis – type locality for species
    • †Gemmula wattsi
  • Genota
    • †Genota keepi
  • Genyonemus
    • †Genyonemus lineatus
  • Geochelone
  • †Geococcyx
    • A living Geococcyx californianus, or greater roadrunner
      †Geococcyx californianus
  • Geomys
  • Geranoaetus
  • Gerrhonotus
  • Gibbolucina
    • †Gibbolucina gyrata
    • †Gibbolucina turneri
  • †Gila – tentative report
  • †Gilbertia
  • †Gisortia
    • †Gisortia clarki
  • Glans
    • †Glans carpenteri
  • Glaucidium
    • A living Glaucidium gnoma, or mountain pygmy owl
      †Glaucidium gnoma
  • Glebocarcinus
    • †Glebocarcinus amphioetus
  • Globigerina
    • †Globigerina bulloides
    • †Globigerina decepta
    • †Globigerina ouachitaensis
    • †Globigerina triloculinoides
  • Globorotalia
    • †Globorotalia crassata
  • Globularia
    • †Globularia hannabali – or unidentified comparable form
  • Glossus
    • †Glossus susukii – type locality for species
  • Glycimeris
  • Fossilized shell of a Glycymeris, or bittersweet clam
    Glycymeris
    • †Glycymeris branneri
    • †Glycymeris gigantea
    • †Glycymeris major
    • †Glycymeris perrini
    • †Glycymeris rosecanyonensis
    • †Glycymeris sagittata
    • †Glycymeris septentrionalis
    • †Glycymeris veatchi
    • †Glycymeris veatchii
  • Glyptoactis
    • †Glyptoactis domenginica
    • †Glyptoactis keenae
    • †Glyptoactis mcmasteri
    • †Glyptoactis sandiegoensis
  • Glyptostrobus
    • †Glyptostrobus oregonensis
  • †Gnathamitermes
    • †Gnathamitermes rousei – type locality for species
  • Gnathotermes
  • †Golerdelphys – type locality for genus
    • †Golerdelphys stocki – type locality for species
  • †Goleremys – type locality for genus
    • †Goleremys mckennai – type locality for species
  • †Gomphotaria – type locality for genus
    • †Gomphotaria pugnax – type locality for species
  • Mounted fossilized skeleton of the Miocene-Pleistocene elephant relative Gomphotherium
    †Gomphotherium
    • †Gomphotherium obscurum
  • †Goniobasis – tentative report
  • Goniopora
    • †Goniopora vaughani – type locality for species
  • Gopherus
    • †Gopherus agassizi
    • †Gopherus agassizii
    • †Gopherus mohavetus – type locality for species
  • †Gordonia
    • †Gordonia egregia
  • Granulina
    • †Granulina margaritula
  • †Gripholagomys – tentative report
  • †Griphomys
    • †Griphomys alecer – type locality for species
    • †Griphomys toltecus – type locality for species
  • Gymnogyps
    • A living Gymnogyps californianus, or California condor
      †Gymnogyps californianus – type locality for species
  • Gyroidina
    • †Gyroidina condoni
    • †Gyroidina orbicularis
    • †Gyroidina planulata
    • †Gyroidina soldanii

H
  • †Hadrogyps – type locality for genus
    • †Hadrogyps aigialeus – type locality for species
  • Haliaeetus
    • †Haliaeetus leucocephalus
  • †Haliaetus
    • †Haliaetus leucocephalus
  • †Halonanus
    • †Halonanus horni
  • †Hamamelites
    • †Hamamelites voyana
  • A living Haminoea bubble sea snail
    Haminoea
    • †Haminoea postangulata – type locality for species
    • †Haminoea vesicula
  • Hanetia
    • †Hanetia elegans
  • †Hantkenina
    • †Hantkenina alabamensis
  • Haplophragmoides
    • †Haplophragmoides flagleri
    • †Haplophragmoides obliquicameratus
  • Fossilized skull of the mesonychian mammal Harpagolestes
    †Harpagolestes – or unidentified comparable form
  • †Harrymys
    • †Harrymys magnus
  • Harvella
    • †Harvella elegans
  • †Hastigerinella
    • †Hastigerinella eocenica
  • †Hayia – type locality for genus
    • †Hayia daulica – type locality for species
  • †Heliscomys
    • †Heliscomys walshi – type locality for species
  • Heloderma
  • †Hemiacodon
    • †Hemiacodon gracilis
  • Fossilized lower jaw of the Miocene-Pleistocene llama relative Hemiauchenia
    †Hemiauchenia
    • †Hemiauchenia macrocephala
  • Hemipristis
  • Hemitelia
    • †Hemitelia pinnata – type locality for species
  • Hemitoma
    • †Hemitoma cantonensis – type locality for species
  • †Hercoglossa
    • †Hercoglossa merriami – type locality for species
    • †Hercoglossa simiensis – type locality for species
  • Here
    • †Here excavata
  • †Herpetocetus
    • †Herpetocetus bramblei – type locality for species
    • †Herpetocetus morrowi – type locality for species
  • Life restoration of the Eocene-Miocene mammal Herpetotherium
    †Herpetotherium
    • †Herpetotherium innominatum – or unidentified comparable form
    • †Herpetotherium knighti – or unidentified comparable form
    • †Herpetotherium valens
  • †Hesperaletes
    • †Hesperaletes borineyi – type locality for species
    • †Hesperaletes walshi – type locality for species
  • Hespererato
  • †Hesperhys
    • †Hesperhys vagrans
  • †Hesperocamelus – or unidentified comparable form
  • †Hesperocetus – type locality for genus
    • †Hesperocetus californicus – type locality for species
  • †Hesperolagomys
  • Hesperomys
    • †Hesperomys nematodon
  • †Hesperotestudo
    • †Hesperotestudo orthopygia
  • A living Heterodontus, or bullhead shark
    Heterodontus
    • †Heterodontus francisi – or unidentified comparable form
  • †Heteropliohippus
    • †Heteropliohippus hulberti – type locality for species
  • Heterosilpha
  • Heteroterma
    • †Heteroterma striata
    • †Heteroterma trochoidea
  • †Hexacanthus
  • Hexagrammos
    • †Hexagrammos achrestus – type locality for species
  • Illustration of a living Hexanchus, or sixgill shark
    Hexanchus
    • †Hexanchus aus
    • †Hexanchus bus
  • Hiatella
  • †Hilgardia – tentative report
    • †Hilgardia parkei
  • †Hiltonius
    • †Hiltonius australis – type locality for species
  • Life restoration of a herd of the Miocene-Pleistocene horse Hipparion. Heinrich Harder (1920).
    †Hipparion
    • †Hipparion forcei
    • †Hipparion tehonense
  • †Hippidion
  • †Hippipeda
  • †Hippnoe
    • †Hippnoe californica
  • Hipponix
    • †Hipponix craniodes
    • †Hipponix tumens
  • †Hipponoe
    • †Hipponoe californica
  • †Hippotherium
  • Histrionicus
    • †Histrionicus histrionicus – tentative report
  • Hodomys
  • Homalopoma
    • †Homalopoma carpenteri
    • †Homalopoma domenginensis
    • †Homalopoma pacifica
    • †Homalopoma wattsi
  • Homo
  • †Homomya
  • Restoration of Pliocene-Pleistocene Homotherium, or scimitar cat
    †Homotherium
    • †Homotherium serum – or unidentified comparable form
  • †Hopkinsina
    • †Hopkinsina compressa
  • †Hoplictis
    • †Hoplictis grangerensis – or unidentified comparable form
  • †Hoplophoneus
    • †Hoplophoneus cerebralis
  • †Humilaria
    • †Humilaria perlaminosa
  • Life restoration of the Eocene-Miocene creodont mammal Hyaenodon
    †Hyaenodon
    • †Hyaenodon venturae
    • †Hyaenodon vetus – type locality for species
  • Hyalina
    • †Hyalina californica
  • †Hyalinonetrion
    • †Hyalinonetrion clavatum
  • Hydrangea
    • †Hydrangea californica – type locality for species
  • †Hydrodamalis
    • †Hydrodamalis cuestae – type locality for species
    • Restorative model of the Pleistocene-Holocene manatee relative Hydrodamalis gigas, or Steller's sea cow
      †Hydrodamalis gigas
  • Hydrophilus
  • Hyla
  • †Hyopsodus – or unidentified comparable form
  • †Hyperbaena
    • †Hyperbaena diforma
  • †Hypertragulus
    • †Hypertragulus calcaratus
    • †Hypertragulus hesperius
  • †Hypohippus
  • †Hypolagus
    • †Hypolagus edensis – type locality for species
    • †Hypolagus fontinalis
    • †Hypolagus furlongi
    • †Hypolagus gidleyi
    • †Hypolagus parviplicatus – or unidentified comparable form
    • †Hypolagus tedfordi
    • †Hypolagus vetus
  • †Hyrachyus

I
  • †Ibarus
    • †Ibarus ignotus – or unidentified comparable form
  • †Idiophyseter – type locality for genus
    • †Idiophyseter merriami – type locality for species
  • †Ignacius
    • †Ignacius frugivorus
  • †Ilingoceros
  • Restoration of the Miocene walrus Imagotaria
    †Imagotaria – type locality for genus
    • †Imagotaria downsi – type locality for species
  • †Indarctos
  • †Inga
    • †Inga ionensis – type locality for species
  • †Interchlamys
    • †Interchlamys interlineata – or unidentified comparable form
  • †Ioscion
    • †Ioscion morgani
  • Ischnochiton
    • †Ischnochiton sanctaemonicae
  • †Ischyrocyon
    • †Ischyrocyon gidleyi
  • Mounted fossilized skeleton of the Eocene-Oligocene rodent Ischyromys
    †Ischyromys
  • Iselica
    • †Iselica fenestrata
  • Isognomon
    • †Isognomon clarki
  • Isurus
    • †Isurus aus
    • †Isurus benedini
    • †Isurus bus
    • †Isurus oxyrhynchus
    • †Isurus oxyrinchus
    • †Isurus planus

J
  • †Jacobsomys
    • †Jacobsomys dailyi – type locality for species
  • †Jamilcotatus
    • †Jamilcotatus boreios – type locality for species
  • Jaton
    • †Jaton eldridgei
    • †Jaton festivus
  • †Johannsenomyia
    • †Johannsenomyia hotchkissae – type locality for species
  • Jouannetia
  • Juliacorbula
    • †Juliacorbula luteola
  • †Julus
    • †Julus cavicola – type locality for species
    • †Julus occidentalis – type locality for species
  • †Jumaraina
    • †Jumaraina rinconensis – type locality for species
  • †Juncus
  • A living Juniperus, or juniper tree
    Juniperus

K
  • Kalolophus
    • †Kalolophus antillarum – or unidentified comparable form
  • †Kampholophos – type locality for genus
    • †Kampholophos serrulus – type locality for species
  • Karreriella
    • †Karreriella barbati
    • †Karreriella mediaaquaensis
  • Katherinella
  • Kelletia
  • Kellia
    • †Kellia suborbicularis
  • Life restoration of the Oligocene-Miocene dolphin Kentriodon
    †Kentriodon – type locality for genus
    • †Kentriodon obscurus – type locality for species
  • †Keteleeria
    • †Keteleeria heterophylloides
  • †Kewia – tentative report
    • †Kewia fairbanksi – or unidentified comparable form
  • †Kingena
    • †Kingena simiensis
  • †Kirkomys – or unidentified comparable form
  • †Knightomys – or unidentified comparable form
  • †Kummelonautilus
  • Kurtiella
    • †Kurtiella tumida
  • Kurtzia
  • Kurtziella

L
  • Shell in multiple views of a Labyrinthus land snail
    †Labyrinthus
    • †Labyrinthus obtusus – type locality for species
  • Lacuna
  • †Lacunaria
    • †Lacunaria striata – or unidentified related form
  • Laevicardium
  • Lagena
    • †Lagena isabella
    • †Lagena strumosa
    • †Lagena substriata
    • †Lagena sulcata
    • †Lagena vulgaris
  • Lagenorhynchus
  • Lamelliconcha
    • †Lamelliconcha clarki
  • Lamna
  • Lampanyctus
  • †Lampris – type locality for genus
  • †Lamprolithax – type locality for genus
    • †Lamprolithax annectens – type locality for species
    • †Lamprolithax simulans – type locality for species
  • Lampropeltis
    • †Lampropeltis getulus
  • †Lantanotherium
    • †Lantanotherium dehmi
    • †Lantanotherium sawini
  • †Lapparia
    • †Lapparia eomagna
  • Larus
    • A living Larus californicus, or California gull
      †Larus californicus
    • †Larus delawarensis
    • †Larus glaucescens
    • †Larus philadelphia
  • Latirus
    • †Latirus buwaldana
    • †Latirus nightingalei – or unidentified comparable form
    • †Latirus roseburgensis – or unidentified comparable form
  • †Laurophyllum
    • †Laurophyllum fremontensis
    • †Laurophyllum litseaefolia
  • †Laytonia – type locality for genus
    • †Laytonia californica – type locality for species
  • Lechytia
  • Leda
    • †Leda gabbi
  • †Legionarictis – type locality for genus
    • †Legionarictis fortidens – type locality for species
  • †Leidymys
  • †Lembicus – type locality for genus
    • †Lembicus meiklejohni – type locality for species
  • Lenticulina
    • †Lenticulina convergens
  • Lepeta
    • †Lepeta concentrica
  • A living Lepidochitona chiton
    Lepidochitona
    • †Lepidochitona keepiana
  • †Lepidogobias
    • †Lepidogobias lepidus
  • Lepidozona
    • †Lepidozona pectinulatus
  • Lepisosteus
    • †Lepisosteus spatula – or unidentified comparable form
  • †Leptacanthichthys
  • †Leptarctus
    • †Leptarctus ancipidens
    • †Leptarctus wortmani
  • Illustration of a fossilized skull of the Oligocene-Miocene dog Leptocyon
    †Leptocyon
    • †Leptocyon leidyi
    • †Leptocyon tejonensis – type locality for species
    • †Leptocyon vafer
    • †Leptocyon vulpinus
  • †Leptodontomys
    • †Leptodontomys stirtoni
  • †Leptomeryx
    • †Leptomeryx blacki
  • Leptopecten
  • †Leptoreodon
    • †Leptoreodon edwardsi – type locality for species
    • †Leptoreodon golzi – type locality for species
    • †Leptoreodon leptolophus – type locality for species
    • †Leptoreodon major – type locality for species
    • †Leptoreodon marshi – or unidentified comparable form
    • †Leptoreodon pusillus – type locality for species
    • †Leptoreodon stocki – type locality for species
  • †Leptotomus
    • †Leptotomus caryophilus
  • Lepus
    • †Lepus americanus
    • †Lepus californicus
    • †Lepus callotis
  • Leukoma
  • Lima
  • Limaria
    • †Limaria hemphilli
  • Top view of a fossilized skull of the Eocene creodont mammal Limnocyon
    †Limnocyon
  • †Limnoecus
    • †Limnoecus tricuspis – type locality for species
  • †Limosa
    • †Limosa fedoa
    • †Limosa vanrossemi – type locality for species
  • Linga
  • †Linophryne
  • †Liolithax – type locality for genus
    • †Liolithax kernensis – type locality for species
  • Liquidambar
    • †Liquidambar californicum
  • Lirobittium – tentative report
  • †Lirosceles
    • †Lirosceles elegans – type locality for species
  • Lirularia
  • Lissodelphis – or unidentified comparable form
  • †Lithocarpus
    • †Lithocarpus klamathensis
    • †Lithocarpus nevadensis
  • Lithophaga
    • †Lithophaga plumula
  • Lithophyllum
    • †Lithophyllum sierraeblancae – type locality for species
  • Life restoration of the Paleocene-Eocene bird Lithornis
    †Lithornis – or unidentified comparable form
  • Lithothamnion
    • †Lithothamnion grahami
    • †Lithothamnion laminosum – type locality for species
    • †Lithothamnion luxurum
    • †Lithothamnion manni
    • †Lithothamnion meganosium
    • †Lithothamnion validum – or unidentified related form
    • †Lithothamnion wallisium
  • †Litorhadia
    • †Litorhadia washingtonensis – or unidentified comparable form
  • Littorina
  • †Lituyapecten
    • †Lituyapecten purisimaensis
  • Life restoration of the Miocene marine drumfish Lompoquia
    †Lompoquia – type locality for genus
    • †Lompoquia retropes – type locality for species
  • †Lonchodelphis
    • †Lonchodelphis occiduus – type locality for species
  • Lontra
    • †Lontra canadensis
  • †Lophar – type locality for genus
    • †Lophar miocaenus – type locality for species
  • †Lophocetus
    • †Lophocetus repenningi – type locality for species
  • †Lophortyx
    • †Lophortyx californica
  • †Lora
  • †Losinia
  • Lottia
  • †Loxolithax – type locality for genus
    • †Loxolithax sinuosa – type locality for species
  • †Loxotrema
    • †Loxotrema turritum
  • Lucapinella
  • Lucina
    • †Lucina gaylordi
    • †Lucina wattsi
  • Lucinisca
    • †Lucinisca nuttalli
  • Lucinoma
    • †Lucinoma acutilineata
    • †Lucinoma annulatum
  • Luidia
    • †Luidia etchegoinensis – type locality for species
    • †Luidia sanjoaquinensis – type locality for species
  • †Lutianus
    • †Lutianus hagari – type locality for species
  • Fossilized skull of the Eocene carnivoran mammal Lycophocyon
    †Lycophocyon – type locality for genus
    • †Lycophocyon hutchisoni – type locality for species
  • †Lygisma – type locality for genus
    • †Lygisma tenax – type locality for species
  • Lygodium
    • †Lygodium kaulfussi
  • Lynx
    • †Lynx fasciatus
    • †Lynx rufus
  • Lyonsia
    • †Lyonsia califomica
    • †Lyonsia venturaensis – type locality for species
  • Lyria
    • †Lyria andersoni
  • †Lyrischapa
    • †Lyrischapa lajollaensis
  • †Lyropecten
    • †Lyropecten bowersi
    • †Lyropecten crassicardo
    • †Lyropecten magnolia
    • †Lyropecten miguelensis
    • †Lyropecten perrini
  • †Lyrosurcula – tentative report

M
  • †Machaeromeryx – tentative report
    • †Machaeromeryx tragulus
  • Fossilized cranium of the Miocene-Pleistocene saber-toothed cat Machairodus
    †Machairodus
  • Macoma
    • †Macoma andersoni
    • †Macoma calcarea
    • †Macoma carlottensis
    • †Macoma copelandi
    • †Macoma diabloensis
    • †Macoma expansa
    • †Macoma indentata
    • †Macoma inquinata
    • †Macoma moesta
    • Shell of Macoma nasuta, or the bent-nosed clam
      †Macoma nasuta
    • †Macoma pabloensis – or unidentified comparable form
    • †Macoma panzana
    • †Macoma planiuscula – or unidentified comparable form
    • †Macoma secta
    • †Macoma viticola
  • Macrarene
  • Macrocallista
    • †Macrocallista furlongi – or unidentified comparable form
    • †Macrocallista horni – or unidentified comparable form
    • †Macrocallista meganosensis – type locality for species
    • †Macrocallista pittsburgensis
    • †Macrocallista squalida
    • †Macrocallista squalidus
    • †Macrocallista weaveri
  • †Macrochlamis
    • †Macrochlamis magnolia
  • Life restoration of the Oligocene toothed-whale Macrodelphinus (background)
    †Macrodelphinus – type locality for genus
    • †Macrodelphinus kelloggi – type locality for species
  • †Macrotarsius
    • †Macrotarsius roederi – type locality for species
  • Mactromeris
    • †Mactromeris abbotti
    • †Mactromeris acutirostrata – or unidentified comparable form
    • †Mactromeris albaria
    • †Mactromeris bisculpturata – or unidentified comparable form
    • †Mactromeris brevirostrata
    • †Mactromeris catilliformis
    • †Mactromeris hemphillii
    • †Mactromeris mercedensis – or unidentified comparable form
    • †Mactromeris merriami
    • †Mactromeris montereyana – type locality for species
    • †Mactromeris muliniaformis – type locality for species
    • †Mactromeris pittsburgensis – or unidentified comparable form
    • †Mactromeris polynyma
    • †Mactromeris ramonensis
    • †Mactromeris rushi
    • †Mactromeris sectoris
    • †Mactromeris tejonensis
  • Mactrotoma
    • †Mactrotoma californica
    • †Mactrotoma nasuta
  • Madracis
    • †Madracis wellsi – type locality for species
  • Madrepora
    • †Madrepora solida – type locality for species
  • Close-up view of a Magnolia flower
    Magnolia
    • †Magnolia corrallina
    • †Magnolia dayana
  • Mahonia
    • †Mahonia macginitiei
    • †Mahonia reticulata
    • †Mahonia simplex
  • Makaira
  • Malea
  • Malletia
  • Mallotus
    • †Mallotus riparius
  • †Mambrinia
    • †Mambrinia gallica – type locality for species
  • †Mammut[2]
    • †Mammut americanum – all local specimens previously referred to this species have since been reclassified in the new species M. pacificus.[3]
    • †Mammut cosoensis
    • †Mammut matthewi
    • †Mammut pacificus – type locality for species. Many specimens were previously regarded as specimens of M. americanum.[4]
  • †Mammuthus
    • †Mammuthus columbi
    • †Mammuthus exilis
    • †Mammuthus hayi
    • Restoration of a herd of Mammuthus primigenius, or wooly mammoths
      †Mammuthus primigenius
  • †Mancalla – type locality for genus
    • †Mancalla californiensis – type locality for species
    • †Mancalla cedrosensis – or unidentified comparable form
    • †Mancalla diegenesis
    • †Mancalla diegensis – type locality for species
    • †Mancalla emlongi – type locality for species
    • †Mancalla lucasi – type locality for species
    • †Mancalla milleri – type locality for species
    • †Mancalla vegrandis
    • †Mancalla vergrandis – type locality for species
  • †Mangelia
    • †Mangelia variegata
  • †Margaritana
    • †Margaritana falcata – or unidentified comparable form
  • Margarites
  • A living Marginella margin sea snail
    Marginella
  • Marginulina
    • †Marginulina adunca – or unidentified comparable form
    • †Marginulina dubia
    • †Marginulina eximia
    • †Marginulina munda
  • Marmota
  • †Marshochoerus
    • †Marshochoerus socialis
  • A living Martes, or marten
    Martes
  • Martesia
    • †Martesia meganosensis – type locality for species
  • †Martinogale
    • †Martinogale faulli – type locality for species
  • Martinottiella
    • †Martinottiella eocenica
  • Maxwellia
  • †Mayena – tentative report
    • †Mayena kewi – or unidentified comparable form
  • †Mealanitta
    • †Mealanitta deglandi
  • †Mediochoerus
    • †Mediochoerus mohavensis
  • †Megacamelus
    • †Megacamelus merriami
  • Megachasma
  • Megachile
  • †Megahippus
    • †Megahippus matthewi
    • †Megahippus mckennai – type locality for species
  • Mounted fossilized skeleton of the Miocene-Pleistocene ground sloth Megalonyx
    †Megalonyx
    • †Megalonyx jeffersonii
    • †Megalonyx mathisi – type locality for species
    • †Megalonyx wheatleyi
  • Megalops – tentative report
    • †Megalops vigilax
  • †Megapaloelodus
    • †Megapaloelodus connectens
  • †Megapetalus
  • Megaptera
    • †Megaptera miocaena – type locality for species
  • Megatebennus
    • †Megatebennus bimaculata
    • †Megatebennus bimaculatus
  • Megathura – tentative report
  • †Megatylopus
    • †Megatylopus matthewi – or unidentified comparable form
  • †Megistostoma
    • †Megistostoma gabbiana – or unidentified comparable form
  • Melampus
    • †Melampus olivaceous
    • †Melampus olivaceus
  • Melanella
    • †Melanella hastata
    • †Melanella micans
  • Melanitta
    • †Melanitta ceruttii – type locality for species
    • †Melanitta deglandi – tentative report
    • †Melanitta fusca
    • †Melanitta perspicillata
  • Melanoplus
    • †Melanoplus differentialis
  • Melanthrips
  • Meleagris
    • †Meleagris richmondi – type locality for species
  • †Meliosma
    • †Meliosma truncata – type locality for species
  • †Melosira
    • †Melosira solida
  • Melospiza
    • †Melospiza melodia
  • †Meniscomys
  • †Meniscotherium
    • †Meniscotherium tapiacitum
  • Life restoration of the Miocene rhinoceros Menoceras
    †Menoceras
    • †Menoceras barbouri
  • Mephitis
    • †Mephitis mephitis
  • †Mercyhippus – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Mercyhippus brevidontus
  • Meretrix
    • †Meretrix californica
    • †Meretrix conradi
    • †Meretrix hornii
    • †Meretrix lorenzana
    • †Meretrix palmeri – type locality for species
    • †Meretrix stantoni
    • †Meretrix uvasana – type locality for species
  • Mergus
    • †Mergus serrator
  • Merluccius
    • †Merluccius productus
  • †Merriamina – type locality for genus
    • †Merriamina ectenes – type locality for species
  • Life restoration of the Miocene pronghorn Merriamoceros with an anachronistic human to scale
    †Merriamoceros
    • †Merriamoceros coronatus – type locality for species
  • †Merychippus
    • †Merychippus brevidontus – type locality for species
    • †Merychippus californicus – type locality for species
    • †Merychippus relictus – or unidentified comparable form
    • †Merychippus stevensi
  • †Merychyus
    • †Merychyus elegans
    • †Merychyus minimus
    • †Merychyus novomexicanus
    • †Merychyus smithi
  • †Merycobunodon
    • †Merycobunodon littoralis – type locality for species
  • Mounted fossilized skeleton of the Miocene pronghorn Merycodus
    †Merycodus
    • †Merycodus joraki
    • †Merycodus necatus
  • Mesalia
    • †Mesalia clarki – type locality for species
    • †Mesalia martinezensis
  • †Mesocyon
    • †Mesocyon brachyops
    • †Mesocyon coryphaeus
  • †Mesodma – tentative report
  • †Mesohippus
  • Mesophyllum
    • †Mesophyllum californicum
    • †Mesophyllum fructiferum
    • †Mesophyllum obsitum
    • †Mesophyllum schenckii – type locality for species
    • †Mesophyllum schenki
  • Fossilized skull of the Miocene oreodont mammal Mesoreodon
    †Mesoreodon
    • †Mesoreodon chelonyx
  • †Metacerithium
    • †Metacerithium packardi
  • †Metalopex
    • †Metalopex merriami
  • †Metanoiamys
    • †Metanoiamys agorus – type locality for species
    • †Metanoiamys fantasma
    • †Metanoiamys korthi – type locality for species
    • †Metanoiamys marinus – type locality for species
  • †Metarhinus
    • †Metarhinus pater – type locality for species
  • †Metatomarctus
    • †Metatomarctus canavus
  • Mounted fossilized skeleton of the Miocene-Pleistocene manatee relative Metaxytherium
    †Metaxytherium
    • †Metaxytherium arctodites
  • †Metechinus
    • †Metechinus amplior
  • †Miacis
    • †Miacis hookwayi – type locality for species
  • †Michenia
    • †Michenia agatensis
    • †Michenia mudhillsensis
  • Micranellum
    • †Micranellum crebricinctum
  • †Microcosmodon – or unidentified comparable form
  • Microdipodops
  • A modern Microgadus, or tomcod
    Microgadus – tentative report
  • †Micropallus
    • †Micropallus whitneyi
  • †Microparamys
    • †Microparamys minutus – or unidentified comparable form
    • †Microparamys tricus – type locality for species
    • †Microparamys woodi – type locality for species
  • †Microsula
  • †Microsyops
    • †Microsyops annectens – or unidentified comparable form
    • †Microsyops kratos – type locality for species
  • †Microtomarctus
    • †Microtomarctus conferta
  • Microtus
    • A living Microtus californicus, or California vole
      †Microtus californicus
    • †Microtus meadensis
    • †Microtus miguelensis – type locality for species
  • Mictomys
    • †Mictomys kansasensis
    • †Mictomys vetus
  • Miltha
    • †Miltha meganosensis – type locality for species
    • †Miltha packi
    • †Miltha sanctaecrucis
    • †Miltha xantusi
  • †Mimomys
  • †Mimotricentes
    • †Mimotricentes tedfordi – type locality for species
  • †Miochlorotettix – type locality for genus
    • †Miochlorotettix gibroni – type locality for species
    • †Miochlorotettix kirkbyi – type locality for species
  • †Miocryptorhopalum – type locality for genus
    • †Miocryptorhopalum kirkbyae – type locality for species
  • †Miocyon
    • †Miocyon scotti – or unidentified comparable form
  • †Miodelphis – type locality for genus
    • †Miodelphis californicus – type locality for species
  • †Miogonates – type locality for genus
    • †Miogonates subimpunctatus – type locality for species
  • †Miohierax – type locality for genus
    • †Miohierax stocki – type locality for species
  • †Miohippus
    • †Miohippus annectens
  • †Miolabis
    • †Miolabis californicus – type locality for species
    • †Miolabis fricki – type locality for species
  • Fossilized skull (top) and interpretive line drawing (middle) of the Miocene auk relative Miomancalla compared with the skull of a Holocene Pinguinus impennis, or great auk
    †Miomancalla
    • †Miomancalla howardi – type locality for species
    • †Miomancalla wetmorei – type locality for species
  • †Miomesamia – type locality for genus
    • †Miomesamia juliae – type locality for species
  • †Miomonalonion – type locality for genus
    • †Miomonalonion conoidifrons – type locality for species
  • †Miomustela
  • †Mionictis
    • †Mionictis angustidens
  • †Miospermophilus
    • †Miospermophilus wyomingensis – or unidentified comparable form
  • †Miosula – type locality for genus
    • †Miosula media – type locality for species
  • †Miotapirus
  • †Miotomodon
    • †Miotomodon mayi – type locality for species
  • †Miotroctes – type locality for genus
    • †Miotroctes rousei – type locality for species
  • †Miotylopus
    • †Miotylopus gibbi
  • Restoration of the Pliocene-Pleistocene Miracinonyx, or American cheetah
    †Miracinonyx
    • †Miracinonyx studeri – tentative report
  • Mirounga
    • †Mirounga angustirostris – or unidentified comparable form
  • Mitra
    • †Mitra fultoni
    • †Mitra idae
    • †Mitra idea
    • †Mitra simplicissima
  • Mitrella
    • †Mitrella carinata
    • †Mitrella gausapata
    • †Mitrella gouldi
    • †Mitrella tuberosa
  • †Mixocetus – type locality for genus
    • †Mixocetus elysius – type locality for species
  • Modiolatus
    • †Modiolatus rectus
  • Modiolus
    • Exterior (left) and interior of the shell of a Modiolus capax, or fat horsemussel
      †Modiolus capax – or unidentified comparable form
    • †Modiolus carpenteri
    • †Modiolus multiradiatus
    • †Modiolus ornatus
    • †Modiolus veronensis
    • †Modiolus ynezianus
  • Modulus
    • †Modulus unidens
  • †Mojavemys
    • †Mojavemys alexandrae – type locality for species
    • †Mojavemys lophatus
    • †Mojavemys wilsoni
  • †Molopophorus
    • †Molopophorus aequicostatus – or unidentified comparable form
    • †Molopophorus antiquatus
    • †Molopophorus biplicatus
    • †Molopophorus californicus – type locality for species
    • †Molopophorus dalli
    • †Molopophorus tejonensis
  • Moniliopsis
    • †Moniliopsis incisa
  • Shell in multiple views of a Monoplex triton sea snail
    Monoplex
  • †Monosaulax
    • †Monosaulax pansus
  • Montipora
  • †Mookomys
    • †Mookomys formicarum
    • †Mookomys subtilis
  • Mopalia
    • †Mopalia acuta
    • †Mopalia ciliata
    • †Mopalia lignosa – or unidentified comparable form
  • Mounted fossilized skeleton of the Miocene chalicothere mammal Moropus
    †Moropus
  • Morula
    • †Morula lugubris
  • Morus – or unidentified comparable form
  • Morus
    • †Morus humeralis – type locality for species
    • †Morus lompocanus – type locality for species
    • †Morus magnus – type locality for species
    • †Morus recentior – type locality for species
    • †Morus reyana – type locality for species
    • †Morus reyma
    • †Morus reyna
    • †Morus vagabundus – type locality for species
  • Mulinia
    • †Mulinia pallida
  • Murex – or unidentified related form
    • †Murex mansfieldi – or unidentified related form
  • Musculus
  • Mustela
    • †Mustela americana – type locality for species
    • †Mustela frenata
  • †Mya
  • †Myadesma
    • †Myadesma pacifica
  • Myctophum
  • Myliobatis
    • †Myliobatis californicus
  • Fossilized skeleton of the Pliocene-Holocene peccary Mylohyus
    †Mylohyus
    • †Mylohyus fossilis
  • †Mylopharodon
  • Myodes
  • Mysella
    • †Mysella aleutica
  • †Mytilimeria
    • †Mytilimeria nuttallii
  • Mytilus
    • †Mytilus arnoldi
    • Living Mytilus californianus, or california mussels
      †Mytilus californianus
    • †Mytilus edulis
    • †Mytilus expansus
    • †Mytilus loeli
    • †Mytilus mathewsoni
    • †Mytilus mathewsonii
    • †Mytilus middendorffi
  • †Mytonolagus
  • †Mytonomys
    • †Mytonomys burkei – type locality for species
    • †Mytonomys mytonensis – or unidentified comparable form
  • Myurella
    • †Myurella martini

N
  • Partial fossilized mandible of the Miocene-Pliocene horse Nannippus
    †Nannippus
  • †Nannocetus – type locality for genus
    • †Nannocetus eremus – type locality for species
  • †Nannolithax – type locality for genus
    • †Nannolithax gracilis – type locality for species
  • †Nanotragulus
    • †Nanotragulus ordinatus – tentative report
  • Narona
  • Nassa
    • †Nassa cerritensis
    • †Nassa delosi
    • †Nassa fossata
    • †Nassa mendica
    • †Nassa perpinguis
    • †Nassa tegula
  • Nassarius
    • †Nassarius californianus
    • †Nassarius cerritensis
    • A living Nassarius fossatus, or channeled basket snail
      †Nassarius fossatus
    • †Nassarius grammatus
    • †Nassarius hamlini
    • †Nassarius inquus
    • †Nassarius mendicus
    • †Nassarius perpinguis
    • †Nassarius stocki
    • †Nassarius tegula
    • †Nassarius whitneyi
  • Natica
    • †Natica lewisi – or unidentified related form
    • †Natica recluziana
    • †Natica uvasana
  • Naticarius
    • †Naticarius unifasciata
  • Mounted fossilized skeleton of the Pleistocene Odocoileus lucasi, or American mountain deer
    †Navahoceros
  • Nectandra
    • †Nectandra presanguinea
  • Negaprion
    • †Negaprion antiquus
    • †Negaprion elongata – or unidentified comparable form
  • †Nekrolagus
  • †Nelumbium
    • †Nelumbium lacunosum – type locality for species
  • Nemocardium
    • †Nemocardium centifilosum
    • †Nemocardium linteum
  • †Neobernaya
  • †Neoculicoides – type locality for genus
    • †Neoculicoides jeanneae – type locality for species
  • †Neogyps
    • †Neogyps errans
  • †Neohipparion
    • †Neohipparion eurystyle
    • †Neohipparion gidleyi – type locality for species
    • †Neohipparion leptode
    • †Neohipparion trampasense
  • †Neoliotomus – or unidentified comparable form
  • †Neolitsea
    • †Neolitsea lata – type locality for species
  • Mounted fossilized skeleton of the Miocene aquatic mammal Neoparadoxia
    †Neoparadoxia – type locality for genus
    • †Neoparadoxia cecilialina – type locality for species
    • †Neoparadoxia repenningi – type locality for species
  • Neophrontops
    • †Neophrontops americanus
  • †Neoplagiaulax
  • Neotamias
    • †Neotamias senex
  • †Neotherium – type locality for genus
    • †Neotherium mirum – type locality for species
  • Neotoma
    • †Neotoma cinerea – type locality for species
    • †Neotoma fossilis
    • †Neotoma fuscipes
    • †Neotoma lepida
    • †Neotoma quadriplicata
    • †Neotoma sawrockensis
    • †Neotoma taylori
  • Neptunea
    • †Neptunea andersoni
    • †Neptunea eurekaensis
    • †Neptunea lawsoni
    • †Neptunea lirata
    • †Neptunea mucronata
    • †Neptunea pulchra
    • †Neptunea scotiaensis
    • †Neptunea tabiilata – or unidentified comparable form
    • †Neptunea tabulata
  • Nerita
    • †Nerita beali – tentative report
  • Living Neritina or nerite snails
    Neritina
    • †Neritina picta
  • †Nerium
    • †Nerium hinoidea – type locality for species
  • †Nerterogeomys
    • †Nerterogeomys anzensis
    • †Nerterogeomys garbanii
  • Neverita
    • †Neverita alta
    • †Neverita callosa
    • †Neverita globosa
    • †Neverita reclusiana
    • †Neverita reclusianus
    • †Neverita recluziana
    • †Neverita recluzianus
    • †Neverita secta – or unidentified comparable form
    • †Neverita thomsonae
  • Nicrophorus
  • †Nimravides
    • †Nimravides thinobates
  • Illustration of the fossilized skull of the Oligocene false saber-toothed cat Nimravus
    †Nimravus
  • Niso – tentative report
    • †Niso antiselli
  • †Nitzschia
    • †Nitzschia reinholdi
    • †Nitzschia romana
  • Nodipecten
  • Nodogenerina
    • †Nodogenerina adolphina
    • †Nodogenerina advena
    • †Nodogenerina sanctaecrucis
    • †Nodogenerina wegemanni
  • Nodosaria
    • †Nodosaria holserica
    • †Nodosaria longiscata
    • †Nodosaria pyrula
  • Nonion
    • †Nonion incisum
  • †Nonomys
    • †Nonomys gutzleri – type locality for species
  • Norrisia
    • †Norrisia norrisi
  • †Nothroptheriops
    • †Nothroptheriops shastense – or unidentified comparable form
  • Life restoration of the Pleistocene ground sloth Nothrotheriops
    †Nothrotheriops
    • †Nothrotheriops texanus
  • †Nothrotherium
    • †Nothrotherium shastense – type locality for species
  • Notiosorex
    • †Notiosorex crawfordi
    • †Notiosorex jacksoni
  • Notoacmea
    • †Notoacmea inessa
  • Notorhynchus
  • †Nototamias
  • Nucella
  • Nucula
    • †Nucula exigua
    • †Nucula gabbiana
    • †Nucula washingtonensis
  • Nuculana
    • †Nuculana gabbi – or unidentified comparable form
    • †Nuculana ochsneri
    • †Nuculana ramonensis
  • Numenius
    • A living Numenius phaeopus, or whimbrel
      †Numenius phaeopus
  • Nutricola
    • †Nutricola cymata
    • †Nutricola ovalis
    • †Nutricola salmonea
    • †Nutricola tantilla
  • Nuttallia
    • †Nuttallia nuttallii
  • †Nyctitherium – or unidentified comparable form
  • Nyctoporis
    • †Nyctoporis carinata
  • †Nyssa
    • †Nyssa californica
    • †Nyssa copeana

O

P
  • †Pachycrommium
    • †Pachycrommium clarki
  • †Paciculus
  • Life restoration of the Miocene sea turtle Pacifichelys
    †Pacifichelys
    • †Pacifichelys hutchisoni – type locality for species
  • †Pacipecten
    • †Pacipecten discus
    • †Pacipecten pabloensis – or unidentified comparable form
  • †Palaeolagus
  • †Palaeolama
    • †Palaeolama mirifica – or unidentified related form
  • †Palaeopsammia
    • †Palaeopsammia zitteli
  • †Palaeoxantusia
    • †Palaeoxantusia allisoni
    • †Palaeoxantusia kyrentos
  • Restoration of the Miocene aquatic mammal Paleoparadoxia
    †Paleoparadoxia
    • †Paleoparadoxia tabatai
  • †Paleosula – type locality for genus
    • †Paleosula stocktoni – type locality for species
  • Palpomyia – type locality for genus
    • †Palpomyia freyi – type locality for species
    • †Palpomyia multispinosa – type locality for species
    • †Palpomyia ryshkoffi – type locality for species
    • †Palpomyia shilo – type locality for species
  • Pandora
    • †Pandora punctata
    • †Pandora wardiana
  • †Panolax
    • †Panolax sanctaefidei
  • Panomya
    • †Panomya ampla
  • Panopea
    • †Panopea abrupta
    • †Panopea estrellana – or unidentified related form
    • †Panopea ramonensis
    • †Panopea smithii
    • †Panopea tenuis
  • Panthera
    • A living Panthera leo, or lion
      †Panthera leo
    • †Panthera onca – or unidentified comparable form
  • †Parabalaenoptera – type locality for genus
    • †Parabalaenoptera baulinensis – type locality for species
  • Paraconcavus
  • †Paracontogenys
    • †Paracontogenys estesi
  • †Paracosoryx
    • †Paracosoryx alticornis
    • †Paracosoryx furlongi
  • †Paraculicoides – type locality for genus
    • †Paraculicoides rouseae – type locality for species
  • Paracyathus
    • †Paracyathus pedroensis – type locality for species
    • †Paracyathus stearnsii
  • †Paracynarctus
    • †Paracynarctus kelloggi
  • †Paradjidaumo
    • †Paradjidaumo reynoldsi – type locality for species
  • †Paradomnina
    • †Paradomnina relictus – or unidentified comparable form
  • †Parafundulus
    • †Parafundulus erdisi
  • Fossilized skull of the Miocene horse Parahippus
    †Parahippus
    • †Parahippus maxsoni – type locality for species
    • †Parahippus pawniensis
  • †Parahyus
  • †Paralichthyes
  • Paralichthys – type locality for genus
    • †Paralichthys antiquus
  • †Paramerychyus
    • †Paramerychyus harrisonensis
    • †Paramerychyus relictus
  • †Paramiolabis
    • †Paramiolabis minutus – type locality for species
    • †Paramiolabis singularis – or unidentified comparable form
    • †Paramiolabis taylori
    • †Paramiolabis tenuis
  • Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
    †Paramylodon
    • †Paramylodon harlani
  • †Paramys
    • †Paramys compressidens – or unidentified comparable form
    • †Paramys leptodus – or unidentified comparable form
  • †Parapavo
    • †Parapavo californica
    • †Parapavo californicus
  • †Parapliohippus
    • †Parapliohippus carrizoensis – type locality for species
  • Life restoration of the Miocene-Pliocene dolphin Parapontoporia (top)
    †Parapontoporia
    • †Parapontoporia sternbergi – type locality for species
    • †Parapontoporia wilsoni – type locality for species
  • †Parasauromalus
    • †Parasauromalus olseni
  • Paraseraphs
    • †Paraseraphs erraticus
  • †Parastylotermes
    • †Parastylotermes calico – type locality for species
    • †Parastylotermes frazieri – type locality for species
  • †Paratomarctus
    • †Paratomarctus temerarius
  • †Pareumys
    • †Pareumys grangeri
    • †Pareumys milleri
  • Life restoration of the Miocene baleen whale Parietobalaena and calf
    †Parietobalaena
    • †Parietobalaena securis – type locality for species
  • †Paromomys
    • †Paromomys depressidens
  • †Paronychomys
  • †Parribacus
    • †Parribacus caesius – type locality for species
  • Parvamussium
  • †Parvicornus – type locality for genus
    • †Parvicornus occidentalis – type locality for species
  • Parvilucina
    • †Parvilucina approximata
    • †Parvilucina tenuisculpta
  • †Parvisipho – tentative report
    • †Parvisipho meganosensis – type locality for species
  • Shell of a Patelloida limpet
    Patelloida
    • †Patelloida tejonensis
    • †Patelloida triquetrus
  • Patinopecten
    • †Patinopecten caurinus
    • †Patinopecten coosensis
    • †Patinopecten healeyi
    • †Patinopecten healyi
    • †Patinopecten lohri
    • †Patinopecten propatulus
  • †Patriolestes
    • †Patriolestes novaceki – type locality for species
  • †Pauromys
    • †Pauromys lillegraveni – type locality for species
  • †Pecoripeda
  • Pecten
    Pecten
    • †Pecten bellus
    • †Pecten bowersi
    • †Pecten dickersoni
    • †Pecten estrellanis
    • †Pecten magnolia
    • †Pecten nevadensis
    • †Pecten perrini
    • †Pecten sespeensis
  • †Pedalion
    • †Pedalion panzana – or unidentified comparable form
  • †Pediomeryx
    • †Pediomeryx hemphillensis
  • †Pedipes
    • †Pedipes liratus
    • †Pedipes unisulcatus
  • †Pelagiarctos – type locality for genus
    • †Pelagiarctos thomasi – type locality for species
  • Reconstructive illustration of a fossilized skull of the Oligocene-Pleistocene pseudo-toothed bird Pelagornis, with close-up insets of its pseudo-teeth
    †Pelagornis
  • Pelecanus
    • †Pelecanus erythrorhynchus – or unidentified comparable form
    • †Pelecanus occidentalis
  • †Peltosaurus
    • †Peltosaurus macrodon – type locality for species
  • Penitella
    • †Penitella penita
  • †Peraceras
    • †Peraceras superciliosum
  • †Peradectes
    • †Peradectes californicus
  • †Periaster
  • Pericosmus
  • †Peridiomys
    • †Peridiomys oregonensis – or unidentified comparable form
  • Interior of the shell of a Periglypta venus clam
    Periglypta
    • †Periglypta multicostata
  • Periploma
    • †Periploma planiuscula
    • †Periploma stewartvillensis – type locality for species
  • †Peripolocetus – type locality for genus
    • †Peripolocetus vexillifer – type locality for species
  • †Perissitys
    • †Perissitys stewarti
  • †Perissolax
    • †Perissolax blakei
    • †Perissolax tricarinatus
  • †Perognathoides
    • †Perognathoides eurekensis
  • A living Perognathus pocket mouse
    Perognathus
    • †Perognathus furlongi
    • †Perognathus minutus
  • Peromyscus
    • †Peromyscus baumgartneri
    • †Peromyscus boylei
    • †Peromyscus complexus – type locality for species
    • †Peromyscus dentalis
    • †Peromyscus hagermanensis
    • †Peromyscus irvingtonensis – type locality for species
    • †Peromyscus maximus – type locality for species
    • †Peromyscus truei – or unidentified comparable form
  • †Perse
    • †Perse lincolnensis
  • Persea
    • †Persea coalingensis
    • †Persea praelingue
    • †Persea pseudocarolinensis
  • Fossilized shell of the Oligocene-modern conch sea snail Persististrombus
    Persististrombus
    • †Persististrombus obliteratus – type locality for species
  • †Petauristodon
    • †Petauristodon jamesi
    • †Petauristodon mathewsi
    • †Petauristodon minimus
    • †Petauristodon uphami
  • Petricola
    • †Petricola carditoides
    • †Petricola cognata
    • †Petricola denticulata
    • †Petricola parallela
  • Petrophyllia
    • †Petrophyllia clarki
    • †Petrophyllia weaveri
  • †Pewelagus
    • †Pewelagus dawsonae
  • Phacoides
    • †Phacoides actulineatus
    • †Phacoides sactaecrucis – tentative report
  • Phalacrocorax
    • A living Phalacrocorax auritus, or double-crested cormorant
      †Phalacrocorax auritus
    • †Phalacrocorax femoralis – type locality for species
    • †Phalacrocorax kennelli – type locality for species
    • †Phalacrocorax pelagicus
    • †Phalacrocorax penicillatus
    • †Phalacrocorax penincillatus
    • †Phalacrocorax penincullatus
    • †Phalacrocorax rogersi – type locality for species
  • Phalaropus
    • †Phalaropus fulicaria
    • †Phalaropus lobatus
  • †Phanaeus
    • †Phanaeus labreae – type locality for species
  • †Phelosaccomys
    • †Phelosaccomys shotwelli – type locality for species
  • †Phenacolemur
    • †Phenacolemur shifrae
  • Illustration of a fossilized skull in multiple views of the Oligocene-Miocene bone-crushing dog Phlaocyon
    †Phlaocyon
    • †Phlaocyon taylori
  • †Phlepsius
    • †Phlepsius weissmanae – type locality for species
  • Phloeodes
    • †Phloeodes diabolicus
    • †Phloeodes plicatus
  • †Phoberogale
    • †Phoberogale shareri – type locality for species
  • Phoca
    • †Phoca vitulina – or unidentified comparable form
  • Phocoena – or unidentified comparable form
  • †Phoebastria
    • †Phoebastria albatrus – type locality for species
    • †Phoebastria anglica – type locality for species
  • Two Phoenicopterus, or flamingos
    Phoenicopterus – or unidentified comparable form
  • Pholadidea
  • Pholadomya
    • †Pholadomya mounti
    • †Pholadomya nasuta
  • Pholas
    • †Pholas gabbi
  • Phos
    • †Phos blakianus – or unidentified comparable form
    • †Phos dumbleanus
  • †Photinia
    • †Photinia miocenica
  • A living Phrynosoma, or horned lizard
    Phrynosoma
  • †Phyllites
    • †Phyllites californica
    • †Phyllites coalingensis
    • †Phyllites cordiaefolia – type locality for species
    • †Phyllites daturaefolia – type locality for species
    • †Phyllites domenginensis
    • †Phyllites ellipticus
    • †Phyllites laurinea
    • †Phyllites temblorensis
  • Phyllonotus
    • †Phyllonotus hippocastanum
    • †Phyllonotus radix
  • A live individual of Physa marmorata
    Physa
  • †Physiculua
  • Phytocrene
    • †Phytocrene sordida
  • Picea
    • †Picea lahontense
    • †Picea magna
    • †Picea sonomensis
  • †Pimelometopodon
    • †Pimelometopodon pulchrum – or unidentified comparable form
  • Pimelometopon
    • †Pimelometopon pulchrum
  • Pinna
    • †Pinna alamedaensis
    • †Pinna latrania – type locality for species
    • †Pinna lewisi
    • †Pinna llajasensis – type locality for species
    • †Pinna mendenhalli – type locality for species
  • †Pinnarctidion – type locality for genus
    • †Pinnarctidion bishopi – type locality for species
  • Pinus
    • †Pinus carmelensis – type locality for species
    • †Pinus muricata
    • †Pinus prelambertiana – or unidentified comparable form
    • †Pinus radiata
    • †Pinus sturgisii
    • †Pinus temblorensis
  • Piranga
    • †Piranga ludoviciana
  • †Piscolithax
  • Shell of a Pitar venus clam
    Pitar
    • †Pitar avenalensis – tentative report
    • †Pitar behri
    • †Pitar california – or unidentified comparable form
    • †Pitar californiana
    • †Pitar campi – or unidentified comparable form
    • †Pitar dalli
    • †Pitar joaquinensis
    • †Pitar newcombianus
    • †Pitar quadratus
    • †Pitar stantoni – or unidentified comparable form
    • †Pitar tejonensis – or unidentified comparable form
    • †Pitar uvasana
    • †Pitar uvasanus
  • †Pithanodelphis
  • †Pithanotaria – type locality for genus
    • †Pithanotaria starri – type locality for species
  • Pituophis
  • Pitymys
    • †Pitymys mcnowni – or unidentified comparable form
  • Placunanomia
    • †Placunanomia granti
  • Planularia
    • †Planularia caribbeana
  • †Platanophyllum
    • †Platanophyllum angustiloba
    • †Platanophyllum whitenyi
    • †Platanophyllum whitneyi
  • Platanus
    • †Platanus angustilobus – type locality for species
    • †Platanus appendiculata
    • †Platanus coloradensis
    • †Platanus dissecta – or unidentified comparable form
    • †Platanus paucidentata
  • Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922).
    †Platygonus
    • †Platygonus bicalcaratus
    • †Platygonus vetus
  • †Platylithax – type locality for genus
    • †Platylithax robusta – type locality for species
  • Platynus
    • †Platynus funebris – or unidentified comparable form
  • Platyodon
    • †Platyodon cancellata
    • †Platyodon cancellatus
  • †Platyoptera
    • †Platyoptera pacifica
  • Platytrochus
    • †Platytrochus diabloensis – type locality for species
    • †Platytrochus merriami – type locality for species
  • †Plectina
    • †Plectina garzaensis
    • †Plectina ruthenica – or unidentified comparable form
  • Plectofrondicularia
    • †Plectofrondicularia kerni
    • †Plectofrondicularia miocenica
    • †Plectofrondicularia packardi
    • †Plectofrondicularia trinitatensis
    • †Plectofrondicularia vaughani
  • †Plectrites
    • †Plectrites classeni
  • Plegadis
    • †Plegadis chihi
  • †Pleiolama
    • †Pleiolama vera
  • Life restoration of the Paleocene-Eocene primate Plesiadapis
    †Plesiadapis
    • †Plesiadapis anceps – or unidentified comparable form
    • †Plesiadapis churchilli – or unidentified comparable form
  • †Plesiogulo
    • †Plesiogulo lindsayi
    • †Plesiogulo marshalli
  • Pleurofusia
    • †Pleurofusia fresnoensis
    • †Pleurofusia lindavistaensis – or unidentified related form
  • †Pleuroncodes
  • †Pleuronichthys
    • †Pleuronichthys veliger
  • †Pliauchenia
    • †Pliauchenia magnifontis – or unidentified comparable form
  • †Plioceros
  • †Pliocyon
    • †Pliocyon medius
  • Fossilized skull of the Miocene horse Pliohippus
    †Pliohippus
    • †Pliohippus coalingensis – type locality for species
    • †Pliohippus fairbanksi – type locality for species
    • †Pliohippus spectans – tentative report
  • †Pliometanastes
    • †Pliometanastes protistus
  • †Plionarctos
    • †Plionarctos edensis – type locality for species
  • †Plionictis
    • †Plionictis ogygia – or unidentified comparable form
  • Life restoration of the Miocene walrus Pliopedia
    †Pliopedia – type locality for genus
    • †Pliopedia pacifica – type locality for species
  • †Pliotaxidea
    • †Pliotaxidea garberi – type locality for species
  • †Pliotomodon
    • †Pliotomodon primitivus – type locality for species
  • †Plithocyon
    • †Plithocyon barstowensis
  • †Plotopterum – type locality for genus
    • †Plotopterum joaquinensis – type locality for species
  • Pluvialis
    • †Pluvialis squatarola
  • Pneumatophorus
    • †Pneumatophorus grex – or unidentified comparable form
  • †Poabromylus – tentative report
    • †Poabromylus robustus
  • Living Pocillopora, or cauliflower coral
    Pocillopora
  • Podiceps
    • †Podiceps arndti
    • †Podiceps auritus
    • †Podiceps discors
    • †Podiceps nigricolis
    • †Podiceps parvus
    • †Podiceps subparvus
  • Podilymbus
    • †Podilymbus podiceps
  • Pododesmus
  • †Poebrodon
    • †Poebrodon californicus – type locality for species
  • Illustration of a fossilized skull of the Oligocene false faber-toothed cat Pogonodon
    †Pogonodon
    • †Pogonodon brachyops
  • Polinices
    • †Polinices – type locality for species informal
    • †Polinices draconis
    • †Polinices horni – or unidentified comparable form
    • †Polinices hornii
    • †Polinices lewisii
    • †Polinices pinyonensis – or unidentified comparable form
    • †Polinices recluzianys
    • †Polinices rectus – or unidentified related form
    • †Polinices susanaensis
    • †Polinices uber
    • †Polinices washingtonensis – or unidentified comparable form
  • Polydora
  • Exterior of the shell of a Polymesoda basket clam
    Polymesoda
    • †Polymesoda tenuis – or unidentified comparable form
  • Polystira
    • †Polystira barretti
  • †Pongamia
    • †Pongamia ovata – type locality for species
  • †Pontolis – or unidentified comparable form
    • †Pontolis magnus
  • Populus
    • †Populus alexanderii
    • †Populus bonhamii
    • †Populus coalingensis
    • †Populus garberii
  • Porichthys
  • Porites
    • †Porites carrizensis – type locality for species
  • †Portunites
    • †Portunites insculpta
  • †Potamides
    • †Potamides carbonica – or unidentified comparable form
    • †Potamides sespeensis
  • †Praemancalla – type locality for genus
    • †Praemancalla lagunensis – type locality for species
  • †Presbychen – type locality for genus
    • †Presbychen abavus – type locality for species
  • †Presbymys
    • †Presbymys lophatus – type locality for species
  • Priene
    • †Priene amoldi
    • †Priene oregonensis
    • †Priene scotiaensis
  • Prionace
    • A living Prionace glauca, or blue shark
      †Prionace glauca
  • †Priscoficus
    • †Priscoficus caudata
  • †Priscofusus
    • †Priscofusus carlsoni – tentative report
    • †Priscofusus hecoxi
    • †Priscofusus lincolnensis
    • †Priscofusus robustus
  • †Pristichampsus
  • Pristiophorus
  • †Pristophorus
  • †Proboscipeda
  • †Procamelus
    • †Procamelus grandis – or unidentified comparable form
  • †Procymophyes – type locality for genus
    • †Procymophyes lithax – type locality for species
  • †Procynodictis
    • †Procynodictis progressus
  • Procyon
    • †Procyon lotor
    • †Procyon psora
  • †Prodipodomys
    • †Prodipodomys idahoensis
    • †Prodipodomys riversidensis – type locality for species
    • †Prodipodomys timoteoensis – type locality for species
  • †Prodipoides
    • †Prodipoides lecontei – type locality for species
  • Progabbia
  • †Proharrymys – or unidentified comparable form
  • †Proheteromys
    • †Proheteromys maximus
    • †Proheteromys sulculus
  • †Promartes
  • †Pronotolagus
    • †Pronotolagus apachensis – or unidentified comparable form
  • †Protadjidaumo
  • †Protanthias – type locality for genus
    • †Protanthias fossilis – type locality for species
  • †Protepicyon
    • †Protepicyon raki – type locality for species
  • †Proterixoides
    • †Proterixoides davisi – type locality for species
  • †Prothomomys
    • †Prothomomys warrenensis – type locality for species
  • Life restoration of the Eocene brontothere mammal Protitanops
    †Protitanops
    • †Protitanops curryi – type locality for species
  • †Protoarrenurus
    • †Protoarrenurus convergens – type locality for species
  • †Protochlorotettix – type locality for genus
    • †Protochlorotettix calico – type locality for species
  • †Protohepialus – type locality for genus
    • †Protohepialus comstocki – type locality for species
  • †Protolabis
    • †Protolabis barstowensis – type locality for species
  • †Protomarctus
    • †Protomarctus optatus
  • †Protoreodon
    • †Protoreodon pacificus – type locality for species
    • †Protoreodon parvus – or unidentified comparable form
    • †Protoreodon pumilus
    • †Protoreodon transmontanus
    • †Protoreodon walshi
  • †Protosciurus
    • †Protosciurus tecuyensis
  • †Protosegestes – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Protosegestes lloydi – type locality for species
  • †Protospermophilus
    • †Protospermophilus quatalensis – type locality for species
  • †Protostrix
    • †Protostrix californiensis – type locality for species
  • †Protosurcula – tentative report
  • Protothaca
    • †Protothaca staleyi
  • †Protothore – type locality for genus
    • †Protothore explicata – type locality for species
  • Illustration of a fossilized skull of the Eocene camel Protylopus
    †Protylopus
    • †Protylopus pearsonensis – type locality for species
    • †Protylopus petersoni – or unidentified comparable form
    • †Protylopus robustus – type locality for species
    • †Protylopus stocki – type locality for species
  • Proximitra – tentative report
    • †Proximitra cretacea
  • Prunus
    • †Prunus turlockensis
  • Psammacoma
    • †Psammacoma acolasta
    • †Psammacoma arctata
    • †Psammacoma yoldiformis
  • Psammotreta
    • †Psammotreta dombei
    • †Psammotreta obesa
    • †Psammotreta rostellata
    • †Psammotreta viridotincta
  • Hypothetical restoration of the Oligocene-Pliocene sea turtle Psephophorus
    †Psephophorus
    • †Psephophorus calvertensis – or unidentified comparable form
  • †Pseudaelurus
    • †Pseudaelurus intrepidus
    • †Pseudaelurus marshi
  • †Pseudoblastomeryx
    • †Pseudoblastomeryx advena
  • Pseudochama
    • †Pseudochama exogyra
  • †Pseudoglandulina
    • †Pseudoglandulina conica
    • †Pseudoglandulina ovata
    • †Pseudoglandulina turbinata
  • Pseudoliva
    • †Pseudoliva dilleri
    • †Pseudoliva inornata – or unidentified comparable form
  • A living Pseudomelatoma sea snail
    Pseudomelatoma
  • †Pseudoparablastomeryx
    • †Pseudoparablastomeryx scotti – or unidentified comparable form
  • †Pseudoparella
  • †Pseudoperrisolax
    • †Pseudoperrisolax blakei
  • †Pseudoseriola – type locality for genus
    • †Pseudoseriola gillilandi – type locality for species
  • †Pseudotheridomys
    • †Pseudotheridomys cuyamensis – type locality for species
  • †Pseudotomus
    • †Pseudotomus californicus
    • †Pseudotomus littoralis – type locality for species
  • Living Pseudotsuga, or Douglas firs
    †Pseudotsuga
    • †Pseudotsuga sonomensis
  • Pteria
    • †Pteria berryi
    • †Pteria hertleini
    • †Pteria pellucida
  • †Pteroplatea
    • †Pteroplatea lapislutosa – type locality for species
  • Pteropurpura
  • Pterostichus
  • Pterynotus
    • †Pterynotus petri
    • †Pterynotus washingtonicus
  • Illustration of a fossilized skull of the Paleocene multituberculate mammal Ptilodus
    †Ptilodus
  • Ptinus
    • †Ptinus priminidi – type locality for species
  • Ptychoramphus
    • †Ptychoramphus aleuticus
  • Puffinus
    • †Puffinus barnesi – type locality for species
    • †Puffinus calhouni – type locality for species
    • †Puffinus diatomicus – type locality for species
    • †Puffinus felthami – type locality for species
    • †Puffinus gilmorei – type locality for species
    • †Puffinus gresus
    • †Puffinus grisesus
    • †Puffinus griseus
    • †Puffinus inceptor – type locality for species
    • †Puffinus kanakoffi
    • †Puffinus mitchelli – type locality for species
    • †Puffinus opisthomelas
    • †Puffinus priscus – type locality for species
    • †Puffinus tenuirostris
  • Pullenia
    • †Pullenia eocenica
    • †Pullenia quinqueloba
  • A living Puma
    †Puma
    • †Puma concolor – type locality for species
  • Puncturella
  • Pupillaria
    • †Pupillaria optabilis
    • †Pupillaria pupilla
  • Purpura
    • †Purpura barbarensis
    • †Purpura festiva
    • †Purpura lima
    • †Purpura lurida
    • †Purpura milicentana – type locality for species
    • †Purpura nuttallii
    • †Purpura poulsoni
    • †Purpura topangensis
  • Shell of a Pusula false cowrie sea snail
    Pusula
    • †Pusula californiana
    • †Pusula solandri
  • Pycnodonte
    • †Pycnodonte eldridgei
    • †Pycnodonte heermanni
    • †Pycnodonte pacifica – or unidentified comparable form
    • †Pycnodonte stewarti – or unidentified related form
  • Pyramidella
    • †Pyramidella adamsi – or unidentified comparable form
    • †Pyramidella mucronis
    • †Pyramidella preblei
  • Pyrene
    • †Pyrene carinata

Q
  • †Quercophyllum
    • †Quercophyllum platanoides – type locality for species
  • A living Quercus, or oak tree
    Quercus
    • †Quercus acorns
    • †Quercus coalingensis
    • †Quercus dispersa
    • †Quercus distincta
    • †Quercus domenginensis
    • †Quercus douglasoides
    • †Quercus eoxalapensis – type locality for species
    • †Quercus hannibali
    • †Quercus hannibalii
    • †Quercus lakevillensis
    • †Quercus merriami
    • †Quercus nevadensis
    • †Quercus pasadorii – type locality for species
    • †Quercus pliopalmerii
    • †Quercus pollardiana
    • †Quercus pseudolyrata
    • †Quercus remingtonii
    • †Quercus sayana
    • †Quercus simulata
    • †Quercus temblorensis
    • †Quercus wislizenoides

R
  • Raja
  • †Rakomeryx
    • †Rakomeryx sinclairi – type locality for species
  • Rallus
    • †Rallus limicola
  • Life restoration of the Miocene-Pliocene pronghorn Ramoceros and Cosoryx. Robert Bruce Horsfall (1913).
    †Ramoceros
    • †Ramoceros brevicornis – type locality for species
  • †Rana
  • †Ranellina
    • †Ranellina pilsbry – or unidentified related form
  • Raninoides
    • †Raninoides slaki – type locality for species
  • †Rapamys
    • †Rapamys fricki – type locality for species
  • Rapana
    • †Rapana vaquerosensis
  • †Rectoguembelina
    • †Rectoguembelina trinitatensis – or unidentified comparable form
  • A living Recurvirostra, or avocet
    Recurvirostra
  • Reithrodontomys
  • †Reithroparamys – or unidentified comparable form
  • Reophax
    • †Reophax pilulifer – or unidentified comparable form
  • †Repomys
    • †Repomys gustelyi – type locality for species
    • †Repomys maxumi – type locality for species
  • Reticulitermes
    • †Reticulitermes laurae – type locality for species
    • †Reticulitermes tibalis
  • Reticutriton
    • †Reticutriton elsmerensis
  • †Retipirula
    • †Retipirula crassitesta
  • A living Retusa barrel bubble sea snail
    Retusa
    • †Retusa carinata
    • †Retusa culcitella
    • †Retusa harpa
    • †Retusa tantilla
  • †Reynoldsomys
    • †Reynoldsomys timoteoensis – type locality for species
  • †Rhabdammina
    • †Rhabdammina eocenica
  • †Rhamnidium
    • †Rhamnidium chaneyi
  • †Rhamnus
    • †Rhamnus calyptus
    • †Rhamnus moragensis
    • †Rhamnus plenus
    • †Rhamnus precalifornica
  • †Rhomarchus – type locality for genus
    • †Rhomarchus ensiger – type locality for species
  • †Rhomurus
    • †Rhomurus fulcratus
  • Rhus
    • †Rhus diablana
    • †Rhus mixta
  • Restoration of the Miocene-Pliocene elephant relative Rhynchotherium
    †Rhynchotherium
    • †Rhynchotherium falconeri
  • †Rhynconella – tentative report
  • †Rhyssomatus
    • †Rhyssomatus miocenae – type locality for species
  • †Rhythmias
    • †Rhythmias gaviotae – type locality for species
    • †Rhythmias slarri
  • Rimella
    • †Rimella macilentus
    • †Rimella supraplicata
    • †Rimella supraplicatus
  • Rissa
    • †Rissa estesi – type locality for species
    • †Rissa tridactyla
  • Rissoina
    • †Rissoina pleistocena
  • Flowers of a living Robinia
    †Robinia
    • †Robinia californica
  • Robulus
    • †Robulus alatolimbatus
    • †Robulus arcuatostriatus
    • †Robulus clericii
    • †Robulus clypeiformis – or unidentified comparable form
    • †Robulus inornatus
    • †Robulus insuetus
    • †Robulus kincaidi
    • †Robulus mayi
    • †Robulus mexicanus
    • †Robulus nikobarensis
    • †Robulus propinquus
    • †Robulus simplex
    • †Robulus terryi – or unidentified comparable form
    • †Robulus warmani
    • †Robulus welchi
  • †Rogenio
    • †Rogenio bowersi
    • †Rogenio solitudinis
    • †Rogenio vanclevei – type locality for species
  • †Rotularia
    • †Rotularia tejonense
  • †Russellagus

S
  • Living Sabal, or palmettos
    Sabal
    • †Sabal miocenica
  • †Sabalites
    • †Sabalites californicus
  • Saccella
    • †Saccella alaeformis
    • †Saccella gabbi
    • †Saccella taphria
  • †Sainguinolaria
    • †Sainguinolaria toulai – or unidentified comparable form
  • Salix
    • †Salix boisiensis
    • †Salix edenensis
    • †Salix hesperia
    • †Salix ionensis
    • †Salix laevigatoides
    • †Salix pelviga
    • †Salix storeyana
    • †Salix wildcatensis
  • †Salumiphocaena
    • †Salumiphocaena stocktoni – type locality for species
  • Fossilized skeleton of the Eocene monitor lizard Saniwa
    †Saniwa
    • †Saniwa ensidens – type locality for species
  • †Sapindus
    • †Sapindus oklahomensis
  • Saracenaria – tentative report
    • †Saracenaria acutiauricularis – or unidentified comparable form
  • †Sarda
    • †Sarda stockii – type locality for species
  • Sassia
    • †Sassia bilineata
  • Saxidomus
  • †Saxolucina
  • Fossilized teeth of the Neogene sperm whale Scaldicetus
    †Scaldicetus
    • †Scaldicetus grandis – or unidentified comparable form
  • †Scalopoides
  • Scapanus
    • †Scapanus latimanus
    • †Scapanus malatinus
    • †Scapanus shultzi – type locality for species
  • Scaphander
    • †Scaphander costatus
    • †Scaphander jugularis
  • Scapharca
    • †Scapharca obispoana
  • Scaphinotus
  • Fossilized jaw and teeth of the Miocene horse Scaphohippus
    †Scaphohippus
    • †Scaphohippus intermontanus – type locality for species
    • †Scaphohippus sumani – type locality for species
  • Sceloporus
    • †Sceloporus occidentalis
  • †Scenopagus
    • †Scenopagus curtidens
    • †Scenopagus priscus – or unidentified comparable form
  • †Schaubeumys
  • †Schedocardia – tentative report
  • †Schistomerus – type locality for genus
    • †Schistomerus californense – type locality for species
  • Schizaster
    • †Schizaster diabloensis
    • †Schizaster lecontei
    • †Schizaster martinezensis
  • †Schizodontomys
  • †Sciuravus
    • †Sciuravus powayensis
  • Sciurus
  • Scomber
    • †Scomber sanctaemonicae
  • †Scomberesox
    • †Scomberesox acutillus – type locality for species
    • †Scomberesox edwardsi – type locality for species
  • Illustration of a living Scopelogadus ridgehead
    Scopelogadus
    • †Scopelogadus mizolepis
  • †Scutella
    • †Scutella fairbanksi
    • †Scutella fairbanski
    • †Scutella merriami
    • †Scutella norrisi
    • †Scutella vaquerosensis
  • †Scutellaster
  • Group of living Scyliorhinus catsharks
    Scyliorhinus
  • †Scymnorhinus
    • †Scymnorhinus occidentalis
  • Searlesia
    • †Searlesia dira
  • †Sebastavus – type locality for genus
    • †Sebastavus vertebralis – type locality for species
  • †Sebastodes
    • †Sebastodes apostates
    • †Sebastodes haroldi – type locality for species
    • †Sebastodes ineziae
    • †Sebastodes porteousi
    • †Sebastodes porteus
    • †Sebastodes rosae
  • Seila
    • †Seila montereyensis
  • Semelangulus
    • †Semelangulus tenuilirata
  • Semele – tentative report
  • Semele
    • †Semele decisa
    • †Semele diabloi
    • †Semele morani
    • †Semele packardi
    • †Semele pulchra
    • †Semele rubropicta
    • †Semele venusta
  • Semicassis
    • †Semicassis louella – type locality for species
    • †Semicassis tuberculiformis
  • Semicossyphus
  • †Semirostrum – type locality for genus
    • †Semirostrum ceruttii – type locality for species
  • Septifer
    • †Septifer bifurcatus
  • A living Sequoiadendron
    †Sequoiadendron
  • †Serbelodon
    • †Serbelodon burnhami
  • Serica
    • †Serica kanakoffi – type locality for species
  • Seriola
    • †Seriola sanctaebarbarae
  • Seriphus
    • †Seriphus politus
  • Serpula
    • †Serpula coreyi
  • Serpulorbis
    • †Serpulorbis llajasensis
  • †Sespedectes
    • †Sespedectes singularis – type locality for species
    • †Sespedectes stocki
  • †Sespemys
    • †Sespemys thurstoni – type locality for species
  • Life restoration of two species of the Oligocene oreodont mammal genus Sespia
    †Sespia
    • †Sespia californica – type locality for species
    • †Sespia nitida
  • Siderastrea
    • †Siderastrea clarki – type locality for species
    • †Siderastrea mendenhalli – type locality for species
  • Sigmodon
    • †Sigmodon lindsayi
    • †Sigmodon minor
  • Sigmoilina – tentative report
  • Siliqua
    • †Siliqua lucida
    • †Siliqua media – or unidentified comparable form
    • †Siliqua patula – or unidentified related form
  • †Simiacritomys
    • †Simiacritomys whistleri – type locality for species
  • †Simidectes
    • †Simidectes medius – or unidentified comparable form
    • †Simidectes merriami – type locality for species
  • †Simimeryx
    • †Simimeryx hudsoni – type locality for species
  • †Simimys
    • †Simimys landeri – type locality for species
    • †Simimys simplex
  • Simomactra
    • †Simomactra dolabriformis
    • †Simomactra falcata
    • †Simomactra planulata
  • †Sinomactra
    • †Sinomactra falcata
  • Several views of the shell of a Sinum moon snail
    Sinum
    • †Sinum debile – or unidentified comparable form
    • †Sinum obliquum
    • †Sinum scopulosum
  • Siphonalia
    • †Siphonalia andersoni
    • †Siphonalia lineata
    • †Siphonalia merriami
    • †Siphonalia sutterensis – or unidentified comparable form
  • Skenea
  • †Smilax
    • †Smilax diforma
    • †Smilax labidurommae
    • †Smilax magna – or unidentified comparable form
    • †Smilax remingtonii
  • Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
    †Smilodon
    • †Smilodon fatalis
    • †Smilodon gracilis
  • †Smilodonichthyes
    • †Smilodonichthyes rastrosus
  • †Smilodonichthys
  • †Smilodonicthyes
    • †Smilodonicthyes rastrosus
  • †Smithites – type locality for genus
    • †Smithites elegans – type locality for species
  • Solariella
    • †Solariella hartleyensis – type locality for species
    • †Solariella peramabilis
    • †Solariella walkeri – type locality for species
  • Modern specimen of the marine bivalve Solemya
    Solemya
    • †Solemya ventricosa
  • Solen
    • †Solen curtis – or unidentified comparable form
    • †Solen rosaceus
    • †Solen sicarius
  • Solena
    • †Solena conradi
    • †Solena gravidus
    • †Solena lorenzana
    • †Solena parallelus – or unidentified comparable form
    • †Solena perrini
    • †Solena stantoni
    • †Solena subverticala
  • Solenastrea
    • †Solenastrea fairbanksi
  • Solenosteira
    • †Solenosteira anomala
  • A living Sorex, or long-tailed shrew
    Sorex
    • †Sorex leahyi
  • Spathipora
  • Spermophilus
    • †Spermophilus argonautus
    • †Spermophilus beecheyi
    • †Spermophilus lateralis
  • †Sphaeroidina
    • †Sphaeroidina gredalensis
  • Sphenia – tentative report
    • †Sphenia meganosensis – type locality for species
  • †Sphenophalos – tentative report
  • A living Sphyrna hammerhead shark
    Sphyrna
    • †Sphyrna aus
    • †Sphyrna bus
  • Spilogale
    • †Spilogale putorius
  • †Spirocrypta
    • †Spirocrypta inornata
    • †Spirocrypta pileum
  • Spiroglyphus
    • †Spiroglyphus lituella
    • †Spiroglyphus tinajasensis
  • Spiroloculina
    • †Spiroloculina lamposa
  • Spiroplectammina
    • †Spiroplectammina coreyi – type locality for species
    • †Spiroplectammina eocenica
    • †Spiroplectammina kewi – type locality for species
  • Spirotropis
    • †Spirotropis bulimoides
    • †Spirotropis perversa
  • Shell of a Spisula, or surf clam
    Spisula
    • †Spisula coosensis
    • †Spisula densatum – type locality for species
    • †Spisula meganosensis – type locality for species
    • †Spisula pabloensis
    • †Spisula packardi
    • †Spisula panzanum
  • Spondylus
    • †Spondylus bostrychites
    • †Spondylus calcifer
    • †Spondylus carlosensis
    • †Spondylus perrini
    • †Spondylus vaquerosensis
  • A living Squalus, or spurdog
    Squalus
    • †Squalus sericulus
    • †Squalus serriculus
  • Squatina
    • †Squatina californica – or unidentified comparable form
    • †Squatina claifornica
    • †Squatina lerichei
  • Squilla
    • †Squilla laingae
  • †Starrias – type locality for genus
    • †Starrias ischyrus – type locality for species
  • Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon
    †Stegomastodon
    • †Stegomastodon mirificus – or unidentified comparable form
  • Stenella
  • †Stenomylus
    • †Stenomylus hitchcocki – or unidentified comparable form
  • Stenoplax
  • Stephanodiscus
    • †Stephanodiscus asteroides
    • †Stephanodiscus carconensis
    • †Stephanodiscus excentricus
    • †Stephanodiscus hantzchii
    • †Stephanodiscus hantzschii
  • †Stephanophyllia
    • †Stephanophyllia californica – type locality for species
    • †Stephanophyllia vacavillensis
  • Stercorarius
  • Sterna
    • †Sterna neglecta
  • †Sternbergia – type locality for genus
    • †Sternbergia waitei – type locality for species
  • Sthenictis
  • †Stichocassidulina
    • †Stichocassidulina thalmanni
  • †Stictocarbo
    • †Stictocarbo kumeyaay – type locality for species
  • †Stockia – type locality for genus
    • †Stockia powayensis – type locality for species
  • Mounted fossilized skeleton of the fossil pronghorn Stockoceros
    †Stockoceros – or unidentified comparable form
  • Stomias
  • Stramonita
  • †Strepsidura
    • †Strepsidura diabloensis – type locality for species
    • †Strepsidura ficus – tentative report
    • †Strepsidura lincolnensis
  • †Streptochetus
    • †Streptochetus californiana – type locality for species
  • Fossilized teeth of the Paleocene-Miocene sandshark Striatolamia
    †Striatolamia
    • †Striatolamia macrota
  • †Striostrea
    • †Striostrea freudenbergi
  • Strioterebrum
    • †Strioterebrum gausapatum
  • †Strobilites
    • †Strobilites temblorensis
  • Strombiformis
    • †Strombiformis raymondi
  • Strombus
  • †Strongyliscus – type locality for genus
    • †Strongyliscus robustus – type locality for species
  • Strongylocentrotus
  • †Strongylodon
    • †Strongylodon falcata
  • Strophocardia
    • †Strophocardia megastropha
  • Sturnella
    • †Sturnella negecta
  • †Stylemys
    • †Stylemys neglectus – type locality for species
  • Subcancilla
  • Life restoration of the Eocene-Oligocene cow-sized rhinoceros Subhyracodon. Charles R. Knight (1890s).
    †Subhyracodon
    • †Subhyracodon kewi
  • Succinea
  • †Suggrunda
  • Sula
    • †Sula clarki – type locality for species
    • †Sula pohli – type locality for species
    • †Sula willetti – type locality for species
  • †Sulcocypraea
    • †Sulcocypraea moumieti
  • Sulcoretusa
    • †Sulcoretusa xystrum
  • Surculites
    • †Surculites aequilateralis
    • †Surculites carpentaria
    • †Surculites carpenteriana
    • †Surculites carpenterianus
    • †Surculites isoformis
    • †Surculites keepi – or unidentified comparable form
    • †Surculites mathewsoni
    • †Surculites mathewsonii
    • †Surculites remondi
    • †Surculites remondii
  • †Surculities – tentative report
  • †Syllomus – or unidentified comparable form
    • †Syllomus aegyptiacus
  • Sylvilagus
    • †Sylvilagus audubonii
    • †Sylvilagus bachmani
    • †Sylvilagus floridanus
    • †Sylvilagus hibbardi
  • Syncera
    • †Syncera translucens
  • A living Syngnathus pipefish
    Syngnathus
    • †Syngnathus avus – type locality for species
  • †Synthiboramphus
    • †Synthiboramphus antiquus
  • Synthliboramphus
    • †Synthliboramphus antiquus
    • †Synthliboramphus hypoleucas
    • †Synthliboramphus hypoleucus
    • †Synthliboramphus rineyi – type locality for species
  • †Synthliboraramphus
    • †Synthliboraramphus antiquus

T
  • Flower of a living Tabernaemontana, or milkwood
    †Tabernaemontana
    • †Tabernaemontana chrysophylloides
  • Tadorna
    • †Tadorna tadorna
  • Tagelus
  • Tamias
    • †Tamias ateles – type locality for species
  • Tamiasciurus
    • †Tamiasciurus hudsonicus
  • Tamiosoma
    • †Tamiosoma gregaria – type locality for species
  • †Tanymykter
    • †Tanymykter brachyodontus
  • Tapirus
  • †Tapochoerus
    • †Tapochoerus egressus – type locality for species
    • †Tapochoerus mcmillini – type locality for species
  • Life restoration of the Eocene carnivoran relative Tapocyon
    †Tapocyon
    • †Tapocyon dawsonae – type locality for species
    • †Tapocyon robustus
  • †Tapomys
    • †Tapomys tapensis
  • Taranis
    • †Taranis incultus
  • Taricha
  • Taxidea
    • †Taxidea taxus
  • Tayassu
    • †Tayassu edensis
  • Tegula
  • †Tejonia
    • †Tejonia lajollaensis – or unidentified comparable form
  • Restoration of the Miocene-Pliocene rhinoceros Teleoceras
    †Teleoceras
    • †Teleoceras fossiger
    • †Teleoceras hicksi
    • †Teleoceras mediocronutum
    • †Teleoceras meridianum
  • †Teletaceras
    • †Teletaceras mortivallis
  • Shell of a Tellina, or tellin
    Tellina
    • †Tellina bodegensis
    • †Tellina cowlitzensis – or unidentified related form
    • †Tellina emacerata
    • †Tellina eugenia
    • †Tellina idae
    • †Tellina kewi
    • †Tellina lebecki – or unidentified comparable form
    • †Tellina martinezensis
    • †Tellina meropsis
    • †Tellina nuculoides
    • †Tellina ocoyana
    • †Tellina oldroydi
    • †Tellina oregonensis
    • †Tellina piercei
    • †Tellina pittsburgensis
    • †Tellina remondii
    • †Tellina soledadensis – or unidentified comparable form
    • †Tellina tehachapi
    • †Tellina undulifera
    • †Tellina vancouverensis – or unidentified comparable form
    • †Tellina wilsoni
  • †Temnocyon
    • †Temnocyon subferox – or unidentified comparable form
  • Tenagodus
    • †Tenagodus californiensis
  • †Tenudomys
    • †Tenudomys bodei
  • Life restoration of the Pleistocene bird of prey Teratornis
    †Teratornis
    • †Teratornis merriami
  • Terebellum
  • Terebra
    • †Terebra albocincta
    • †Terebra californica
    • †Terebra danai
    • †Terebra pedroana
    • †Terebra protexta
    • †Terebra santana – type locality for species
  • Terebratalia
    • †Terebratalia batequia – or unidentified related form
  • Fossilized shell in two views of the Late Devonian-modern brachiopod Terebratula
    Terebratula
  • Terebratulina
    • †Terebratulina tejonensis
    • †Terebratulina tejonensis waringi
  • Teredo
  • Terminalia
    • †Terminalia estamina
  • †Tessarolax – tentative report
    • †Tessarolax inconspicua
  • Testudo
  • †Testudoolithus – or unidentified comparable form
  • †Tetraclaenodon
    • †Tetraclaenodon puercensis
  • Tetraclita
  • †Tetrameryx
    • †Tetrameryx irvingtonensis – type locality for species
  • †Texoceros
    • †Texoceros altidens – or unidentified comparable form
    • †Texoceros edensis – type locality for species
  • Thais
    • †Thais carrizoensis
    • †Thais lamellosa
    • †Thais packi
  • Life restoration of the Miocene fur seal Thalassoleon
    †Thalassoleon
    • †Thalassoleon macnallyae – type locality for species
    • †Thalassoleon mexicanus
  • †Thamnasteria
    • †Thamnasteria sinuata – type locality for species
  • Thamnophis
  • Thanatophilus
  • †Thelyphonus
    • †Thelyphonus hadleyi – type locality for species
  • Thomomys
    • †Thomomys bottae
    • †Thomomys gidleyi
    • †Thomomys leucodon
    • †Thomomys microdon – type locality for species
    • †Thomomys monticola
  • †Thouinopsis
    • †Thouinopsis myricaefolia
  • Thracia
    • †Thracia pedroana
    • †Thracia sorrentoensis – or unidentified comparable form
    • †Thracia undulata
  • Thunnus – type locality for genus
    • †Thunnus starksi – type locality for species
  • Thyasira
    • †Thyasira folgeri
  • †Thyrsites
    • †Thyrsites kriegeri – type locality for species
  • †Ticholeptus
    • †Ticholeptus zygomaticus
  • Timoclea
    • †Timoclea picta
  • Tinosaurus
    • †Tinosaurus stenodon – or unidentified comparable form
  • †Tiphyocetus – type locality for genus
    • †Tiphyocetus temblorensis – type locality for species
  • Mounted fossilized skeleton of the Miocene-Pleistocene camel Titanotylopus
    †Titanotylopus
  • Tivela
    • †Tivela diabloensis
    • †Tivela gabbi
    • †Tivela inezana
    • †Tivela kelloggensis
    • †Tivela stultorum
  • †Tomarctus
    • †Tomarctus brevirostris
    • †Tomarctus hippophaga
    • †Tomarctus hippophagus – or unidentified comparable form
  • †Topangasquilla
    • †Topangasquilla gravesi
  • Torcula
    • †Torcula inezana
  • †Tornatellaea
    • †Tornatellaea pinguis
  • Totanus
  • Foliage of living Toxicodendron
    †Toxicodendron
    • †Toxicodendron franciscana
  • Toxopneustes
  • Toxostoma
    • †Toxostoma redivivum
  • Trachycardium
    • †Trachycardium procerum
    • †Trachycardium schencki
    • †Trachycardium vaquerosensis
    • †Trachycardium woodringi – type locality for species
  • Transennella
    • †Transennella joaquinensis – or unidentified comparable form
  • A living Tremarctos, or spectacled bear
    Tremarctos
  • Tresus
  • Triakis – tentative report
  • Trichotropis
    • †Trichotropis cancellata
    • †Trichotropis insignis – or unidentified comparable form
  • Tricolia
    • †Tricolia compta
    • †Tricolia pulloides
  • †Trigonictis
  • Trionyx
  • Triphora
    • †Triphora pedroana
  • A living Triplofusus spindle sea snail
    Triplofusus
  • †Triplopus – tentative report
    • †Triplopus woodi – type locality for species
  • Trochammina
    • †Trochammina albertensis
    • †Trochammina palea – type locality for species
  • Trochita
    • †Trochita filosa
  • Trochocyathus
    • †Trochocyathus crooki
    • †Trochocyathus durhami – type locality for species
    • †Trochocyathus grahami – type locality for species
    • †Trochocyathus imperialis – type locality for species
    • †Trochocyathus nomlandi – type locality for species
    • †Trochocyathus stantoni – type locality for species
  • †Trogomys
    • †Trogomys rupinimenthae – type locality for species
  • †Trogosus
  • Trophon
    • †Trophon carisaensis – or unidentified comparable form
    • †Trophon eucymata
    • †Trophon fleenerensis
    • †Trophon gillulyi
    • †Trophon hernensis – or unidentified comparable form
    • †Trophon kernensis
    • †Trophon multicostatus
    • †Trophon pacificus
  • †Trossulus – tentative report
    • †Trossulus exoletus
  • †Trypanotoma
    • †Trypanotoma stocki
  • †Tubulodon – or unidentified comparable form
  • †Tubulostium – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Tubulostium tejonensis
  • Shell of a Tucetona bittersweet clam
    Tucetona
  • Tudicla
    • †Tudicla blakei
  • †Tunita – type locality for genus
    • †Tunita octavia – type locality for species
  • †Turbinolia
    • †Turbinolia capayasensis – type locality for species
    • †Turbinolia clarki – type locality for species
    • †Turbinolia dickersoni – type locality for species
    • †Turbinolia imbulata
    • †Turbinolia pusillanima – type locality for species
  • Turbonilla
  • Turcica
  • Turdus
  • †Turio
    • †Turio culveri – type locality for species
  • Turricula
    • †Turricula cooperi
    • †Turricula merriami
    • †Turricula praeattenuata – or unidentified comparable form
    • †Turricula waringi
  • Turris
    • †Turris fresnoensis
    • †Turris perissolaxoides
  • Fossilized shells of the Late Jurassic-modern tower snail Turritella
    Turritella
    • †Turritella andersoni
    • †Turritella bosei
    • †Turritella bulwaldana
    • †Turritella buwaldana
    • †Turritella carisaensis
    • †Turritella carrisaensis
    • †Turritella cooperi
    • †Turritella hendoni
    • †Turritella imperialis – type locality for species
    • †Turritella inezana
    • †Turritella inezani
    • †Turritella infragranulata
    • †Turritella lajollaensis – or unidentified comparable form
    • †Turritella lawsoni
    • †Turritella lorenzana – type locality for species
    • †Turritella mariana
    • †Turritella meganosensis – type locality for species
    • †Turritella merriami
    • †Turritella ocoyana
    • †Turritella pachecoensis
    • †Turritella reversa
    • †Turritella stocki
    • †Turritella temblorensis
    • †Turritella uvasana
    • †Turritella variata
    • †Turritella wittichi
  • Turritriton
  • A living Tursiops, or bottlenose dolphin
    Tursiops – or unidentified comparable form
  • Typha
    • †Typha lesquereuxii
  • Typhis
  • Tyto
    • †Tyto alba

U
  • Uca
    • †Uca hamlini
  • †Uintasorex
    • †Uintasorex montezumicus – type locality for species
  • Life restoration of the Eocene mammal Uintatherium
    †Uintatherium
  • Ulmus
    • †Ulmus affinis
  • †Umbellularia
    • †Umbellularia salicifolia
  • †Umpquaia
  • Uria
    • †Uria aalgae
    • A pair of living Uria aalge, or common murre
      †Uria aalge
    • †Uria algae
    • †Uria brodkorbi – type locality for species
    • †Uria paleohesperis – type locality for species
  • †Uriscus
    • †Uriscus californicus
  • †Urobatis
    • †Urobatis halleri
  • †Urocitellus
    • †Urocitellus beldingi
  • Urocyon
    • †Urocyon californicus
    • †Urocyon cinereoargenteus
    • †Urocyon galushai
  • Urolophus
    • †Urolophus halleri – tentative report
  • Ursus
    • A living Ursus americanus, or American black bear
      †Ursus americanus
  • †Ustatochoerus
    • †Ustatochoerus major
  • Uta
    • †Uta stansburiana
  • Uvigerina
    • †Uvigerina garzaensis
  • †Uvigerinella
    • †Uvigerinella obesa

V
  • †Valenictus – type locality for genus
    • †Valenictus chulavistensis – type locality for species
    • †Valenictus imperialensis – type locality for species
  • Valvulineria
    • †Valvulineria californica
    • †Valvulineria casitasensis
    • †Valvulineria tumeyensis
    • †Valvulineria wilcoxensis – or unidentified comparable form
  • †Vanderhoofius
    • †Vanderhoofius coalingensis
  • †Vaquerosella
    • †Vaquerosella andersoni
    • †Vaquerosella coreyi
    • †Vaquerosella durhami
    • †Vaquerosella fairbanksi
    • †Vaquerosella merriami
    • †Vaquerosella vaquerosensis
  • Vasum
    • †Vasum caestum
  • †Vauquelinia
    • †Vauquelinia exigua – type locality for species
  • Fossilized shell of the Paleocene-Miocene nerite sea snail Velates
    †Velates
    • †Velates californicus – type locality for species
    • †Velates perversus
  • Velutina
  • Venericardia
    • †Venericardia hornii
    • †Venericardia mulleri
    • †Venericardia planicosta
    • †Venericardia sandiegoensis
  • Venus
    • †Venus purpurissata
  • Vermicularia
    • †Vermicularia ebunea
  • Veromessor
    • †Veromessor andrei
  • †Vertipecten
    • †Vertipecten alexclarki – type locality for species
    • †Vertipecten nevadanus
    • †Vertipecten perrini
    • †Vertipecten yneziana – or unidentified related form
  • †Viburnum
    • †Viburnum variabilis
  • A living Vireo
    †Vireo
  • †Virgulina
    • †Virgulina bramlettei
    • †Virgulina bramlettrei
    • †Virgulina dibollensis
  • Vitrinella – tentative report
  • Volsella
    • †Volsella merriami
    • †Volsella porterensis – or unidentified comparable form
  • A living Voluta sea snail
    Voluta
  • †Volutilithes
    • †Volutilithes orocopiaensis – type locality for species
  • Volutopsius
    • †Volutopsius eurekaensis
  • Volvulella
    • †Volvulella cylindrica
  • †Vouapa
    • †Vouapa geminifolia – type locality for species
  • Vulpes
    • †Vulpes cascadensis
    • †Vulpes kernensis – type locality for species
    • †Vulpes stenognathus
    • †Vulpes velox
  • Vulvulina
    • †Vulvulina curta

W
  • †Washakius
    • †Washakius woodringi – type locality for species
  • †Whitneyella
    • †Whitneyella sinuata
  • Williamia
    • †Williamia peltoides
  • Restoration of the Permian shark Wodnika
    †Wodnika
    • †Wodnika ocoyae – type locality for species
  • †Woodburnehyus – type locality for genus
    • †Woodburnehyus grenaderae – type locality for species

X
  • Fossilized shell of the Late Cretaceous-modern carrier shell sea snail Xenophora
    Xenophora
    • †Xenophora stocki
    • †Xenophora zitteli
  • †Xenothrissa – type locality for genus
    • †Xenothrissa aphrasta – type locality for species
  • †Xyne – type locality for genus
    • †Xyne grex – type locality for species
  • †Xyrinius – type locality for genus
    • †Xyrinius houshi – type locality for species

Y
  • †Yaquius
    • †Yaquius travisi
  • †Yatkolamys
  • Yoldia
    • †Yoldia cooperii
    • †Yoldia impressa
    • †Yoldia mortuasusensis – type locality for species
    • †Yoldia packardi – or unidentified comparable form
    • †Yoldia scissurata
    • †Yoldia tenuissima
  • †Yumaceras – tentative report
    • †Yumaceras ruminalis – type locality for species

Z
  • †Zachrysia
    • †Zachrysia fraterna – type locality for species
  • Zalophus
    • †Zalophus californianus
  • Fossil of the Early Triassic-Eocene cycad-like frond Zamites
    †Zamites
    • †Zamites californica
  • †Zanteclites – type locality for genus
    • †Zanteclites hubbsi – type locality for species
  • †Zaphleges
    • †Zaphleges longurio
  • †Zapteryx
    • †Zapteryx californicus – or unidentified comparable form
  • †Zarhinocetus
    • †Zarhinocetus errabundus – type locality for species
  • Zelkova
    • †Zelkova oregoniana
  • Zenaida
    • †Zenaida macroura
  • Zirfaea
    • †Zirfaea dentata – or unidentified comparable form
    • †Zirfaea pilsbryi
  • Zonotrichia
    • †Zonotrichia leucophrys
  • Known material diagram depicting the Miocene-Pleistocene mastodon relative Zygolophodon with a human to scale
    †Zygolophodon
gollark: Well, if I needed one, which I don't, obviously both those options are boring and I should be put into a polar orbit around Saturn.
gollark: If you don't have to do them, you can save significant amounts of money.
gollark: I mean, funerals and such are actually not cheap.
gollark: Immortality really saves on grave costs, see.
gollark: Well, you know what they say; "orbital bee strike inbound, none are safe".

References
  1. Charles L. Powell II; Erica C. Clites; Ashley W. Poust (2019). "Miocene marine macropaleontology of the fourth bore Caldecott Tunnel excavation, Berkeley Hills, Oakland, California, USA". PaleoBios. 36: ucmp_paleobios_44567.
  2. Alton C. Dooley; Eric Scott; Jeremy Green; Kathleen B. Springer; Brett S. Dooley; Gregory James Smith (2019). "Mammut pacificus sp. nov., a newly recognized species of mastodon from the Pleistocene of western North America". PeerJ. 7: e6614. doi:10.7717/peerj.6614. PMC 6441323. PMID 30944777.
  3. Alton C. Dooley; Eric Scott; Jeremy Green; Kathleen B. Springer; Brett S. Dooley; Gregory James Smith (2019). "Mammut pacificus sp. nov., a newly recognized species of mastodon from the Pleistocene of western North America". PeerJ. 7: e6614. doi:10.7717/peerj.6614. PMC 6441323. PMID 30944777.
  4. Alton C. Dooley; Eric Scott; Jeremy Green; Kathleen B. Springer; Brett S. Dooley; Gregory James Smith (2019). "Mammut pacificus sp. nov., a newly recognized species of mastodon from the Pleistocene of western North America". PeerJ. 7: e6614. doi:10.7717/peerj.6614. PMC 6441323. PMID 30944777.
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