List of the Cenozoic life of Texas

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

A
  • †Abdounia
    • †Abdounia enniskilleni
    • †Abdounia recticona
  • Abra
    • †Abra nitens
    • †Abra petropolitana
  • Shell of an Acanthocardia cockle
    Acanthocardia
    • †Acanthocardia tuomeyi
  • Acar
    • †Acar aspera
  • Acirsa
    • †Acirsa whitneyi
  • †Aclistomycter
    • †Aclistomycter dunagani – type locality for species
    • †Aclistomycter middletoni – type locality for species
  • Acris
    • †Acris crepitans
  • Shells of Acteocina barrel-bubble sea snails
    Acteocina
  • Acteon
    • †Acteon idoneus
    • †Acteon pomilis
    • †Acteon pomilius
    • †Acteon punctatus
  • Adeonellopsis – tentative report
  • †Adjidaumo
    • †Adjidaumo minutus – or unidentified comparable form
  • Admetula
    • †Admetula irregularis – type locality for species
  • Adrana
    • †Adrana aldrichiana
  • Aedes
  • †Aelurodon
    • †Aelurodon ferox
    • †Aelurodon taxoides
  • Life restoration of the Miocene camel Aepycamelus, or the long-necked camel. Heinrich Harder (1920).
    †Aepycamelus
  • Agaronia
    • †Agaronia bombylis
    • †Agaronia media
    • †Agaronia mediavia
  • Agkistrodon
  • †Agriocharis
    • †Agriocharis anza
  • †Agriochoerus
    • †Agriochoerus antiquus
  • †Agriotherium
    • †Agriotherium schneideri
  • †Agrobuccinium
  • †Agrobuccinum
    • †Agrobuccinum mansfieldi
  • †Aguascalientia
  • †Aguispira
    • †Aguispira alternata
  • Akera
    • †Akera texana
  • †Alforjas
    • †Alforjas taylori – type locality for species
  • Aliculastrum
  • †Alilepus
    • †Alilepus wilsoni
  • †Allaeochelys – or unidentified comparable form
  • Alligator
  • †Allognathosuchus
  • †Allomorone
    • †Allomorone burlesonis
  • †Allophaiomys
    • †Allophaiomys pliocaenicus
  • †Altaspiratella
    • †Altaspiratella bearnensis – tentative report
  • Alvania
  • †Alveinus
    • †Alveinus minutus
  • Amaea
    • †Amaea macula – type locality for species
    • †Amaea texana – type locality for species
  • †Amaurellina
    • †Amaurellina plummeri – type locality for species
    • †Amaurellina singleyi
  • †Amblema
  • †Ambystoma
    • †Ambystoma tigrinum
  • Life restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932).
    †Amebelodon
    • †Amebelodon britti
    • †Amebelodon floridanus
    • †Amebelodon fricki – or unidentified comparable form
  • †Ameiurus
  • †Amentogerdiopollenites – type locality for genus
    • †Amentogerdiopollenites oligocenensis – type locality for species
  • †Amentoplexipollenites – type locality for genus
    • †Amentoplexipollenites catahoulaensis – type locality for species
  • Amnicola
    • †Amnicola integra
  • †Amphicyon
    • †Amphicyon longiramus
    • †Amphicyon pontoni
  • Fossilized skull of the Miocene saber-toothed cat Amphimachairodus
    †Amphimachairodus
    • †Amphimachairodus coloradensis – or unidentified comparable form
  • Amphiuma
    • †Amphiuma antica – type locality for species
  • †Amplobalanus – type locality for genus
    • †Amplobalanus texensis – type locality for species
  • †Ampullina
    • †Ampullina dumblei
    • †Ampullina recurva
  • Amuletum
    • †Amuletum curvocostatum
  • Amusium
    • †Amusium zinguli – type locality for species
  • †Amynodon
    • †Amynodon advenus
  • †Amynodontopsis
    • †Amynodontopsis bodei
  • Anadara
    • †Anadara vaughani
  • Life resoration of the Miocene-Pleistocene elephant relative Anancus
    †Anancus
    • †Anancus defloccatus – type locality for species
    • †Anancus orarius – type locality for species
  • †Anchitheriomys
  • †Anchitherium
    • †Anchitherium navasotae – type locality for species
  • Ancilla
    • †Ancilla staminea – type locality for species
    • †Ancilla staminea punctulifera
  • †Angelarctocyon
    • †Angelarctocyon australis – type locality for species
  • †Angulithes
    • †Angulithes elliotti
  • †Anilioides
    • †Anilioides nebraskensis – or unidentified comparable form
  • †Anisaster
    • †Anisaster mossomi
  • Modern fruit, whole and in cross-section of an Annona tree
    †Annona
    • †Annona ampla
  • Anodontia
    • †Anodontia reklawensis – type locality for species
  • †Anomalofusus
  • Anomia
    • †Anomia argentaria
    • †Anomia ephippioides
    • †Anomia lisbonensis
  • Antalis
    • †Antalis minutistriatum
    • †Antalis mississippiense
    • †Antalis palmerae – type locality for species
  • Anthonomus – tentative report
  • †Antiguastrea
    • †Antiguastrea cellulosa
  • Antillophos
    • †Antillophos multilineatum – type locality for species
  • Antrozous
    • †Antrozous pallidus
  • †Aphelops
    • †Aphelops malacorhinus
    • †Aphelops megalodus
    • †Aphelops mutilus
  • †Aplexia
    • †Aplexia hypnorum
  • Aplodinotus
    • †Aplodinotus grunniens
  • †Apocynophyllum
    • †Apocynophyllum wilcoxense
  • †Apternodus
    • †Apternodus iliffensis
  • Aquila
    • †Aquila chrysaetos
  • Arca
    • †Arca petropolitana
  • †Archaeohippus
    • †Archaeohippus blackbergi – type locality for species
  • †Archaeolagus
    • †Archaeolagus acaricolus – or unidentified comparable form
    • †Archaeolagus buangulus – type locality for species
  • Life restoration of the Eocene-Oligocene entelodont mammal Archaeotherium
    †Archaeotherium
    • †Archaeotherium mortoni – or unidentified comparable form
  • Architectonica
    • †Architectonica aldrichi – type locality for species
    • †Architectonica alveatum
    • †Architectonica amoena
    • †Architectonica bellensis
    • †Architectonica bellistriata
    • †Architectonica bimixta
    • †Architectonica elaborata
    • †Architectonica fimbriaea – type locality for species
    • †Architectonica geminicostata – type locality for species
    • †Architectonica huppertzi
    • †Architectonica meekana
    • †Architectonica ornata
    • †Architectonica phoenicea
    • †Architectonica planiformis
    • †Architectonica reklawensis – type locality for species
    • †Architectonica texcarolina
    • †Architectonica vespertina
  • Arcopagia
    • †Arcopagia trumani
  • †Arctocyon
    • †Arctocyon mumak – or unidentified comparable form
  • Restoration of an Arctodus, or short-faced bear, with a human to scale
    †Arctodus
    • †Arctodus simus
  • †Arctonasua
    • †Arctonasua gracilis – or unidentified comparable form
  • †Ardynomys
    • †Ardynomys occidentalis
  • Argobuccinum
  • Argyrotheca
    • †Argyrotheca powersi
  • Arius – or unidentified comparable form
  • Arizona
    • †Arizona elegans
  • †Arretotherium
    • †Arretotherium acridens
  • †Artocarpus
    • †Artocarpus lessigiana
  • Astarte
  • Asthenotoma
    • †Asthenotoma eximia
  • †Astrohippus
    • †Astrohippus ansae – type locality for species
    • †Astrohippus stockii
  • Multiple views of a fossilized shell of the volute sea snail Athleta
    Athleta
    • †Athleta dalli
    • †Athleta kerensensis
    • †Athleta limopsis
    • †Athleta limposis
    • †Athleta lisbonensis
    • †Athleta olssoni
    • †Athleta petrosa
    • †Athleta rugatus
    • †Athleta stenzeli
    • †Athleta symmetricus
    • †Athleta texanus
    • †Athleta wheelockensis
  • †Athletea
    • †Athletea petrosus
  • Atlanta
    • †Atlanta eocenica
  • †Atopomys
    • †Atopomys texensis
  • Atractosteus
    • †Atractosteus spatula
    • †Atractosteus tristoechus – tentative report
  • Atrina
    • †Atrina cawcawensis
    • †Atrina gardnerae
  • Restoration of the Paleocene-Miocene nautiloid cephalopod Aturia
    †Aturia
    • †Aturia brazoensis
    • †Aturia laticlavia
    • †Aturia triangula
    • †Aturia turneri
  • Atys
    • †Atys atysopsis
    • †Atys trapaquara
  • †Aulolithomys
    • †Aulolithomys bounites
  • †Australocamelus
    • †Australocamelus orarius – type locality for species
  • †Auxontodon
  • †Awateria
    • †Awateria retifera

B
  • †Baioconodon
  • Baiomys
    • †Baiomys rexroadi
  • †Baiotomeus
    • †Baiotomeus douglassi
  • Bairdia
    • †Bairdia oviformis
  • A living Balanophyllia stony coral
    Balanophyllia
    • †Balanophyllia augustinensis – type locality for species
    • †Balanophyllia desmophyllum
    • †Balanophyllia irrorata
    • †Balanophyllia ponderosa
  • Balanus
  • Balcis
    • †Balcis exilis
    • †Balcis tenua
    • †Balcis wheeleri
  • Three fossilized shells of the Late Cretaceous-Eocene marine bivalve Baluchicardia
    †Baluchicardia
    • †Baluchicardia bulla
    • †Baluchicardia hesperia
    • †Baluchicardia moa
    • †Baluchicardia whitei
    • †Baluchicardia wilcoxensis
  • Bankia
    • †Bankia petalus – type locality for species
  • †Baptemys – or unidentified comparable form
  • Barbatia
    • †Barbatia cuculloides
    • †Barbatia deusseni
    • †Barbatia ludoviciana
    • †Barbatia reklawensis – type locality for species
    • †Barbatia salebrosus – type locality for species
    • †Barbatia uxorispalmeri
  • Fossilized skull of the Miocene-Pliocene false saber-toothed cat Barbourofelis
    †Barbourofelis
    • †Barbourofelis whitfordi
  • Bassariscus
    • †Bassariscus casei
  • Bathyarca
    • †Bathyarca claibornica – type locality for species
  • †Bathygenys
    • †Bathygenys reevesi – type locality for species
  • Bathytoma
  • Bathytormus
    • †Bathytormus flexurus
  • †Batrachosauroides
    • †Batrachosauroides dissimulans
  • †Bauzaia – type locality for genus
    • †Bauzaia lamberi – type locality for species
    • †Bauzaia melrosensis
    • †Bauzaia mucronata
  • †Beckiasorex
    • †Beckiasorex hibbardi
  • Bela – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Bela rebeccae
  • †Belosaepia
    • †Belosaepia pennae – type locality for species
    • †Belosaepia ungula
    • †Belosaepia ungulata
  • †Belosepia
    • †Belosepia pennae – type locality for species
  • †Bensonomys
    • †Bensonomys coffeyi
  • †Beretra
    • †Beretra ornatula – or unidentified related form
  • Bison
  • Bittiolum – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Bittiolum webbi
  • Bittium
    • †Bittium anita
    • †Bittium estellense
    • †Bittium estellensis
    • †Bittium henryleai
    • †Bittium ridgei – type locality for species
    • †Bittium tresquatrum – type locality for species
  • †Blancocamelus
    • †Blancocamelus meadei
  • †Blancotherium – type locality for genus[1]
    • †Blancotherium buckneri – type locality for species. Formerly known as Gnathabelodon buckneri.[2]
  • Blarina
    • †Blarina brevicauda – or unidentified comparable form
  • †Blastomeryx
    • †Blastomeryx vigoratus – type locality for species
  • Fossilized skeleton of the eocene-?Miocene boa snake Boavus
    †Boavus – tentative report
    • †Boavus affinis
  • †Bolis
    • †Bolis enterogramma
  • †Bombacacidites
    • †Bombacacidites paulus
  • †Bomburia – or unidentified comparable form
  • †Bonellitia
    • †Bonellitia bastropensis
    • †Bonellitia parilis
  • †Borealosuchus
  • Bornia
    • †Bornia prima
    • †Bornia zapataensis
  • Restoration of two of the Miocene-Pliocene bone-crushing dog genus Borophagus preying on a camel. Jay Matternes (1964).
    †Borophagus
  • †Bouromeryx
    • †Bouromeryx submilleri
  • †Boverisuchus
    • †Boverisuchus vorax – or unidentified comparable form
  • Brachidontes
    • †Brachidontes alabamensis
    • †Brachidontes saffordi
    • †Brachidontes texanus
  • Brachiodontes
  • †Brachyerix – tentative report
    • †Brachyerix hibbardi – type locality for species
  • †Brachyhyops
    • †Brachyhyops viensis
    • †Brachyhyops wyomingensis
  • †Brachyopsigale
    • †Brachyopsigale dubius
  • Skeletal reconstruction of the Eocene-Oligocene bear-dog Brachyrhynchocyon
    †Brachyrhynchocyon
    • †Brachyrhynchocyon dodgei
  • †Brauzaia
    • †Brauzaia melrosensis
  • †Brazosiella – type locality for genus
    • †Brazosiella kokeni – type locality for species
    • †Brazosiella moselevi
    • †Brazosiella moseleyi – type locality for species
  • Bregmaceros
    • †Bregmaceros troelli – type locality for species
  • Brissus
    • †Brissus exiguus
  • †Bryozoan
  • Bufo
    • A living Anaxyrus cognatus (formerly Bufo cognatus), or Great Plains toad
      †Bufo cognatus
    • †Bufo woodhousei
  • †Buisnictis
    • †Buisnictis breviramus
  • Bulimulus
    • †Bulimulus dealbatus
  • Bullia
    • †Bullia altilis – type locality for species
    • †Bullia ancillops
    • †Bullia ellipticum – type locality for species
    • †Bullia tenera
  • †Bulovia
    • †Bulovia weisbordi

C
  • Cadulus
    • †Cadulus abruptus
    • †Cadulus aldrichi
    • †Cadulus bisissura – type locality for species
    • †Cadulus ouachitensis
    • †Cadulus phoenicea
    • †Cadulus subcoarcuatus
    • †Cadulus turgidus
  • Caecum – or unidentified comparable form
  • †Caenolambda
    • †Caenolambda jepseni
  • Caestocorbula
    • †Caestocorbula wailesiana
  • †Calamagras
    • †Calamagras weigeli
  • Fossilized carapace of the Paleocene-Miocene crab Calappilia
    †Calappilia
    • †Calappilia diglypta
  • †Calippus
    • †Calippus cerasinus – or unidentified comparable form
    • †Calippus circulus – type locality for species
    • †Calippus large informal
    • †Calippus martini
    • †Calippus placidus
    • †Calippus proplacidus
    • †Calippus regulus – type locality for species
  • Callianassa
    • †Callianassa brazoensis
    • †Callianassa wechesensis
  • Callucina
    • †Callucina sabelli
  • †Calorhadia
    • †Calorhadia bella
    • †Calorhadia compsa
    • †Calorhadia diminutia – type locality for species
    • †Calorhadia opulenta
  • Calyptraea
  • †Calyptraphorus
    • †Calyptraphorus aldrichi
    • †Calyptraphorus popenoe
    • †Calyptraphorus trinodiferus
    • †Calyptraphorus velatus
  • Mounted fossilized skeleton of the Pliocene-Holocene camel Camelops
    †Camelops
    • †Camelops hesternus – type locality for species
    • †Camelops minidokae
  • †Camptoceratops
    • †Camptoceratops priscus – type locality for species
  • Cancellaria
  • †Cancelrana
    • †Cancelrana finexa
  • Candona
    • †Candona lactea – or unidentified comparable form
    • †Candona nyensis
  • Canis
  • Cantharus
    • †Cantharus casteri
  • Fossilized skeleton of the Pleistocene dwarf pronghorn Capromeryx
    †Capromeryx
    • †Capromeryx furcifer
  • Capulus
    • †Capulus americanus
  • Carapus
    • †Carapus smithvillensis – type locality for species
  • Carcharhinus
    • †Carcharhinus gibbesi
  • Cardiomya
    • †Cardiomya fredsmithi – type locality for species
  • Cardium
  • †Caricella
    • †Caricella cherokeensis
    • †Caricella demissa
    • †Caricella heilprini
    • †Caricella stenzeli
  • †Carpocyon
    • †Carpocyon robustus
  • †Carpolithus
  • Carychium
  • Caryocorbula
    • †Caryocorbula cappa
    • †Caryocorbula coloradoensis
    • †Caryocorbula deusseni
    • †Caryocorbula engonatoides
    • †Caryocorbula kennedyi
    • †Caryocorbula marquezensis – type locality for species
  • A living Caryophyllia solitary coral
    Caryophyllia
    • †Caryophyllia constricta – type locality for species
    • †Caryophyllia mediavia – type locality for species
    • †Caryophyllia texana – type locality for species
  • Castor
    • †Castor canadensis
  • Catagonus
  • †Caveola
    • †Caveola ostium – type locality for species
  • Celleporaria
    • †Celleporaria granulosa
  • Celtis
  • †Centetodon
    • †Centetodon chadronensis
    • †Centetodon pulcher
  • Centropomus – tentative report
  • Ceratobulimina
    • †Ceratobulimina eximia
  • Life restoration of the Miocene-Pleistocene horned gopher Ceratogaulus. Robert Bruce Horsfall (1913).
    †Ceratogaulus
    • †Ceratogaulus anecdotus – or unidentified comparable form
  • †Cerdocyon
    • †Cerdocyon texanus – type locality for species
  • Cerithiella
    • †Cerithiella terebropsis
  • †Cerithioderma
    • †Cerithioderma primum
  • Cerithiopsis
  • Cerithium – tentative report
  • Chaetodipus
    • †Chaetodipus hispidus
  • Chama
    • †Chama taylorensis – type locality for species
  • Charina
    • †Charina prebottae
  • †Charophyte
    • †Charophyte oogonia
  • Fossilized cranium of the Pliocene-Pleistocene hyena Chasmaporthetes
    †Chasmaporthetes
    • †Chasmaporthetes ossifragus
  • †Chiromyoides
    • †Chiromyoides minor – or unidentified comparable form
    • †Chiromyoides potior
  • Chironomus
    • †Chironomus kirklandi – type locality for species
  • Chlamys
    • †Chlamys beverlyi
    • †Chlamys burlesonensis
  • †Chriacus
    • †Chriacus baldwini
  • †Cimolodon
  • †Cimomia
    • †Cimomia vaughani – type locality for species
  • Cirsotrema
    • †Cirsotrema nassulum
  • Cissus
    • †Cissus pulcherrima
  • †Claibornichthys
    • †Claibornichthys troelli – type locality for species
  • Multiple views of a fossilized shell of the Paleocene-Pliocene spindle sea snail Clavilithes
    Clavilithes
    • †Clavilithes acus – type locality for species
    • †Clavilithes chamberlaini
    • †Clavilithes kennedyanus
    • †Clavilithes parvetorbis – type locality for species
    • †Clavilithes penrosei
    • †Clavilithes regexus
    • †Clavilithes texanus
  • Clavus – tentative report
    • †Clavus dipta
  • †Cleonidius
    • †Cleonidius channingensis – type locality for species
    • †Cleonidius ritablancaensis – type locality for species
  • Clithrocytheridea
    • †Clithrocytheridea garretti
  • Closia
    • †Closia semen
    • †Closia semenoides
  • Clypeaster
    • †Clypeaster oxybaphon – or unidentified comparable form
    • †Clypeaster rogersi
  • †Cochlefusia
    • †Cochlefusia serrae – type locality for species
  • Shell of a Cochlespira sea snail
    Cochlespira
    • †Cochlespira bastropensis
    • †Cochlespira bella
    • †Cochlespira columbaria
    • †Cochlespira engonata
    • †Cochlespira greggi – tentative report
  • †Cochlespirella
    • †Cochlespirella nana
  • †Cochlespiropsis
    • †Cochlespiropsis engonata
  • Cochliolepis
    • †Cochliolepis palaeocenica – type locality for species
  • Cochlodesma
    • †Cochlodesma howei – or unidentified comparable form
    • †Cochlodesma ovalis – type locality for species
  • †Colodon
    • †Colodon stovalli
  • Coluber
    • A living Coluber constrictor, or eastern racer
      †Coluber constrictor
  • Colubraria
    • †Colubraria cedri
  • Columbella – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Columbella punctostriata
  • †Colwellia
    • †Colwellia bilineata – type locality for species
  • †Combretum
    • †Combretum bartonii
  • Cominella – or unidentified comparable form
    • †Cominella pachecoi
  • Conomitra
    • †Conomitra texana
  • Conopeum
    • †Conopeum damicornis
  • †Contracuparius – type locality for genus
    • †Contracuparius huntsvillensis – type locality for species
    • †Contracuparius robustus – type locality for species
  • Fossilized shell of a Conus cone snail
    Conus
    • †Conus sauridens – type locality for species
    • †Conus smithvillensis
  • †Copemys
  • †Coptostoma
    • †Coptostoma rameum
    • †Coptostoma ulmulum
  • Corbicula
    • †Corbicula texana
  • Corbula
    • †Corbula alabamiensis
    • †Corbula augustae
    • †Corbula cappa
    • †Corbula coloradoensis
    • †Corbula kennedyi
    • †Corbula marquezensis – type locality for species
    • †Corbula milium
    • †Corbula texana – type locality for species
  • Fossilized skeleton preserved in situ (upper left, 2) of the Miocene-Pliocene horse Cormohipparion
    †Cormohipparion
    • †Cormohipparion fricki – type locality for species
    • †Cormohipparion goorisi
    • †Cormohipparion ingenuum – type locality for species
    • †Cormohipparion skinneri – type locality for species
  • †Cornulina
    • †Cornulina armigera
    • †Cornulina dalli
    • †Cornulina minax – type locality for species
  • †Coronia
    • †Coronia alternata
    • †Coronia anacona
    • †Coronia childreni
    • †Coronia genitiva
    • †Coronia margaritosa
    • †Coronia mediavia
    • †Coronia nodoidea
    • †Coronia nucleata
    • †Coronia ostrarupis
    • †Coronia sublerchi
    • †Coronia taylori – type locality for species
  • †Corvina
    • †Corvina intermedia
  • Corvus
    • †Corvus brachyrhynchos
  • †Coryphodon
    • †Coryphodon armatus
  • Restoration of the Miocene palaeomerycid Cranioceras, a relative of modern deer, with anachronistic human to scale
    †Cranioceras
    • †Cranioceras teres – type locality for species
  • Crassatella
    • †Crassatella antestriata
    • †Crassatella gabbi
    • †Crassatella ioannes
    • †Crassatella texalta
    • †Crassatella texana
    • †Crassatella trapaquara
  • Crassinella
    • †Crassinella aldrichi
    • †Crassinella minor
    • †Crassinella pteleina
  • Fossilized shell of the Cretaceous-modern oyster Crassostrea
    Crassostrea
    • †Crassostrea amichel
    • †Crassostrea contracta
    • †Crassostrea frionis
  • Cratogeomys
    • †Cratogeomys castanops
  • Crenella
    • †Crenella margaritacea
  • †Crenodonta
    • †Crenodonta perplicata
  • †Creonella
  • Creseis
  • †Cristellaria
    • †Cristellaria orelliana
    • †Cristellaria rotulata
    • †Cristellaria torrida
  • Crotalus
    • †Crotalus atrox
    • A living Crotalus horridus, or timber rattlesnake
      †Crotalus horridus
  • Crotaphytus
  • †Cryptochorda
    • †Cryptochorda eureia
    • †Cryptochorda stenostoma
  • Cryptotis
    • †Cryptotis parva
  • Ctenoides
    • †Ctenoides bastropensis
  • †Cubitostrea
    • †Cubitostrea divaricata
    • †Cubitostrea lisbonensis
    • †Cubitostrea petropolitana
    • †Cubitostrea sanctiaugustini
    • †Cubitostrea sellaeformis
    • †Cubitostrea smithvillensis
  • Shell of a Cucullaea, or false ark shell
    Cucullaea
    • †Cucullaea kaufmanensis
    • †Cucullaea macrodonta
    • †Cucullaea saffordi
    • †Cucullaea texana
  • Culex
  • Cuna
  • †Cuneocorbula
    • †Cuneocorbula subengonata
  • †Cupanites
    • †Cupanites formosus
  • †Cupidinimus
  • Cuspidaria
    • †Cuspidaria grandis
  • Life restoration of the Pliocene-Holocene elephant relative Cuvieronius
    †Cuvieronius
  • Cyclammina
  • Cyclostremiscus
    • †Cyclostremiscus axacuus
    • †Cyclostremiscus dalli
    • †Cyclostremiscus exacuus
    • †Cyclostremiscus sylvaerupis
  • Cylichna
    • †Cylichna bicarinata – type locality for species
  • †Cylindracanthus
  • †Cylindrodon
  • Cyllene – or unidentified comparable form
    • †Cyllene bellana
  • Underside of a fossilized cranium of the Oligocene-Miocene bone-crushing dog Cynarctoides
    †Cynarctoides
    • †Cynarctoides whistleri
  • †Cynarctus
    • †Cynarctus crucidens
  • Cynomys
    • †Cynomys ludovicianus
    • †Cynomys spenceri
  • Cypraea
  • Cypraedia
    • †Cypraedia subcancellata – type locality for species
  • †Cypraeorbis
    • †Cypraeorbis bulbus – type locality for species
  • Cypridopsis
    • †Cypridopsis vidua
  • Cythara
    • †Cythara schotti
  • Cythere
    • †Cythere claiborniana
    • †Cythere evergreenica
    • †Cythere leeana
    • †Cythere orelliana
    • †Cythere texana
  • †Cythereis
    • †Cythereis bursilloides
    • †Cythereis davidwhitei
    • †Cythereis elmana
    • †Cythereis elongata – type locality for species
    • †Cythereis fragillissima – type locality for species
    • †Cythereis hilgardi
    • †Cythereis linospinosa – type locality for species
    • †Cythereis montgomeryensis
    • †Cythereis quinquespinosa – type locality for species
    • †Cythereis reklawensis – type locality for species
    • †Cythereis russelli
    • †Cythereis sinuata – type locality for species
    • †Cythereis smithvillensis – type locality for species
    • †Cythereis spinosa – type locality for species
    • †Cythereis splendens – type locality for species
    • †Cythereis uptonensis – type locality for species
    • †Cythereis washburni – type locality for species
  • Cytherella
    • †Cytherella fimbricinctus – type locality for species
    • †Cytherella texana
  • Cytheridea
    • †Cytheridea compressa – type locality for species
    • †Cytheridea habropapillosa – type locality for species
    • †Cytheridea mulleri
    • †Cytheridea subovata – type locality for species
    • †Cytheridea subpyriformis – type locality for species
  • Cytheropteron
    • †Cytheropteron minutum – type locality for species
    • †Cytheropteron virgineum

D
  • †Dakotaophis
    • †Dakotaophis greeni
  • †Daphoenictis
  • †Daphoenodon
    • †Daphoenodon notionastes
  • †Daphoenus
    • †Daphoenus lambei – or unidentified comparable form
  • Dasyatis
  • Dasypus
  • †Delahomeryx
    • †Delahomeryx browni – type locality for species
  • Dentalium
    • †Dentalium mediaviense
    • †Dentalium palmerae – type locality for species
    • †Dentalium thalloides – or unidentified related form
  • Dermatemys
  • †Desmatippus
    • †Desmatippus texanus
  • †Diablomomys – type locality for genus
    • †Diablomomys dalquesti – type locality for species
  • †Diaphyodus
    • †Diaphyodus wilsoni – type locality for species
  • †Dibelodon
    • †Dibelodon praecursor
  • Restoration of the Oligocene-Miocene hornless rhinoceros Diceratherium. Robert Bruce Horsfall (1913).
    †Diceratherium
    • †Diceratherium annectens
    • †Diceratherium armatum
  • Didelphis
    • †Didelphis marsupialis
  • †Dillenites
    • †Dillenites microdentatus
    • †Dillenites texensis
  • †Dinofelis
    • †Dinofelis palaeoonca
  • †Dinohippus
    • †Dinohippus interpolatus – type locality for species
    • †Dinohippus mexicanus – or unidentified comparable form
  • †Dinohyus
    • †Dinohyus hollandi
  • Diplodonta
    • †Diplodonta anterproductus
    • †Diplodonta petropolitana
    • †Diplodonta satex
  • Diplotaxis – or unidentified comparable form
  • Dipodomys
    • †Dipodomys merriami
    • †Dipodomys ordii
    • †Dipodomys pattersoni – type locality for species
    • †Dipodomys spectabilis
  • †Dirocerithium
    • †Dirocerithium wechesense
  • †Discotrochus
    • †Discotrochus orbignianus
  • †Discradisca
    • †Discradisca littigensis
  • Disonycha
  • †Dolicholatirus
    • †Dolicholatirus harrisi
    • †Dolicholatirus leaensis
    • †Dolicholatirus obtusus
    • †Dolicholatirus singleyi
  • †Domenginella
    • †Domenginella ridgei – type locality for species
  • †Domingella
    • †Domingella ridgei – type locality for species
  • Dorsanum
    • †Dorsanum – type locality for species informal
    • †Dorsanum scalatum
  • †Drepanomeryx
    • †Drepanomeryx falciformis
  • †Dryophyllum
    • †Dryophyllum tennesseensee
  • Illustration of the fossilized jaws and teeth of the Eocene brontothere mammal Duchesneodus
    †Duchesneodus
    • †Duchesneodus uintensis

E
  • †Eburneopecten
    • †Eburneopecten scintillatus
  • Fossilized shell of the Eocene turtle Echmatemys
    †Echmatemys
  • †Ectypodus
    • †Ectypodus musculus
  • †Edaphocyon
    • †Edaphocyon pointblankensis – type locality for species
  • †Ekokenia
    • †Ekokenia eporrecta
  • Elaphe
    • †Elaphe guttata
    • †Elaphe nebraskensis
    • †Elaphe obsoleta
  • Eleutherodactylus
    • †Eleutherodactylus augusti
  • †Ellipsechinus
    • †Ellipsechinus prisca
  • †Ellisella
  • Shell of an Emarginula keyhole limpet
    Emarginula – or unidentified comparable form
  • Endochironomus
  • Endopachys
    • †Endopachys maclurii
  • Engelhardia[3]
    • †Engelhardia trinitiensis – type locality for species[3]
  • †Eoancilla
    • †Eoancilla hordea – type locality for species
  • †Eocypraea
    • †Eocypraea estellensis
  • †Eocythara – type locality for genus
    • †Eocythara lineata – type locality for species
    • †Eocythara texanum – type locality for species
  • †Eodichroma – type locality for genus
    • †Eodichroma mirifica – type locality for species
  • †Eodrilla
    • †Eodrilla texana
  • †Eodrillia
    • †Eodrillia texana
    • †Eodrillia texanopsis
  • †Eomellivora
  • †Eopleurotoma
    • †Eopleurotoma bimoniata
    • †Eopleurotoma lisboncola
    • †Eopleurotoma nodocarinata
  • †Eosolea – type locality for genus
    • †Eosolea texana – type locality for species
  • †Eosurcula
    • †Eosurcula moorei – type locality for species
    • †Eosurcula superpons
  • †Eotylopus
    • †Eotylopus reedi – or unidentified comparable form
  • Epicauta
  • Mounted fossilized skeleton of the Miocene bone-crushing dog Epicyon
    †Epicyon
    • †Epicyon haydeni
    • †Epicyon saevus
  • †Epihippus
    • †Epihippus gracilis
  • Epilucina
  • Episcynia
    • †Episcynia bastropensis
  • Episiphon
    • †Episiphon gracilis – type locality for species
  • Epitonium
    • †Epitonium cookii
    • †Epitonium dolosum
    • †Epitonium multiliniferum
  • †Epitriplopus
  • Eponides
    • †Eponides patelliformis
    • †Eponides texana
  • Eptesicus
    • †Eptesicus fuscus
    • †Eptesicus hemphillensis – type locality for species
  • Equus
    • †Equus alaskae – or unidentified comparable form
    • †Equus complicatus
    • †Equus conversidens
    • †Equus francisci – type locality for species
    • †Equus giganteus
    • †Equus idahoensis
    • †Equus midlandensis
    • †Equus scotti – type locality for species
    • †Equus semiplicatus
    • Fossilized skeleton of the Pliocene-Pleistocene horse Equus simplicidens, also known as the Hagerman horse or American zebra
      †Equus simplicidens
  • Erethizon
    • †Erethizon dorsatum
  • †Eucheilodon
    • †Eucheilodon reticulata
  • †Eucyon
    • †Eucyon davisi
  • Eucytherura
    • †Eucytherura claibornensis – type locality for species
  • Eulima
    • †Eulima extremis
    • †Eulima tenaxa
  • A living Plestiodon obsoletus (formerly Eumeces obsoletus), or Great Plains skink
    Eumeces
    • †Eumeces fasciatus
    • †Eumeces miobsoletus – type locality for species
    • †Eumeces obsoletus
  • †Euonymus
    • †Euonymus glanduliferus
  • Eupleura
    • †Eupleura morula
  • †Euryochetus
    • †Euryochetus punctatum – type locality for species
  • Eurytellina
    • †Eurytellina milamensis – type locality for species
    • †Eurytellina mooreana
    • †Eurytellina papyria
  • Shell of a Euspira moon sea snail
    Euspira
    • †Euspira aldrichi
    • †Euspira jacksonensis
    • †Euspira marylandica
    • †Euspira perspecta
  • †Eutrephoceras
    • †Eutrephoceras reesidei
  • †Eutypomys
    • †Eutypomys inexpectatus – type locality for species
  • †Exilia
    • †Exilia pergracilis

F
  • Falsifusus
    • †Falsifusus apicalis
    • †Falsifusus bastropensis
    • †Falsifusus harrisi
    • †Falsifusus houstonensis
    • †Falsifusus ludlovicianus
    • †Falsifusus ottonis
    • †Falsifusus perobliquus
    • †Falsifusus tobar
  • Shell of a Fasciolaria, or tulip sea snail
    Fasciolaria – tentative report
    • †Fasciolaria plummeri
  • Felis
    • †Felis lacustris
    • †Felis rexroadensis
  • Fibularia
    • †Fibularia texana
  • †Ficopsis
    • †Ficopsis nucleoides – type locality for species
    • †Ficopsis penita
    • †Ficopsis texana
  • Ficus
    • †Ficus berryi
    • †Ficus mississippiensis
  • †Fimbriatella
    • †Fimbriatella iugum – type locality for species
  • Flabellum
    • †Flabellum concoideum
    • †Flabellum conodeum – tentative report
    • †Flabellum conoideum – type locality for species
    • †Flabellum cuneiforme
    • †Flabellum johnsonae
  • †Floridachoerus – tentative report
    • †Floridachoerus olseni
  • †Floridatragulus
    • †Floridatragulus hesperus
    • †Floridatragulus nanus
    • †Floridatragulus texanus
  • A living Formica, or wood ant
    Formica
    • †Formica eoptera – type locality for species
  • Fossaria
    • †Fossaria dalli
    • †Fossaria obrussa
  • Fulgurofusus
    • †Fulgurofusus quercollis
  • †Fusconaia
    • †Fusconaia undulata – or unidentified comparable form
  • Fusimitra
    • †Fusimitra adamsi
    • †Fusimitra millingtoni
    • †Fusimitra perexilis
    • †Fusimitra polita
  • A living Fusinus sea snail
    Fusinus
    • †Fusinus claibornica – type locality for species
  • †Fusoficula
    • †Fusoficula angelinensis
  • Fustiaria
    • †Fustiaria aciculata – type locality for species

G
  • Gadila
    • †Gadila palmerae
  • Galeocerdo
    • †Galeocerdo eaglesomei
    • †Galeocerdo latidens
  • Shell of a Galeodea helmet snail
    Galeodea
    • †Galeodea dubia
    • †Galeodea koureos
    • †Galeodea petersoni
    • †Galeodea planotecta
  • Gastrocopta
  • Fossilized skull of the Miocene crocodile relative Gavialosuchus
    †Gavialosuchus
  • Gegania
    • †Gegania antiquata
  • †Gelastops
  • †Genartina – type locality for genus
    • †Genartina texana – type locality for species
  • Geochelone
  • Geomys
    • †Geomys bursarius
    • †Geomys minor
    • †Geomys tobinensis
  • †Gigantocamelus
    • †Gigantocamelus spatulus
  • †Gilbertina
    • †Gilbertina texana
  • Restoration of a herd of the Pliocene-Holocene ground sloth Glossotherium
    †Glossotherium
    • †Glossotherium chapadmalense
  • †Glottidia
    • †Glottidia antarctica – type locality for species
  • Glycymeris
    • †Glycymeris petropolitana
  • †Glyphalini
    • †Glyphalini identata
  • Glyptoactis
    • †Glyptoactis alticostata
    • †Glyptoactis coloradonis
    • †Glyptoactis crenaea
    • †Glyptoactis eoa
    • †Glyptoactis linguinodifera – type locality for species
    • †Glyptoactis milamensis – type locality for species
    • †Glyptoactis trapaquara
  • Life restoration of the Pleistocene armadillo relative Glyptodon
    †Glyptodon
    • †Glyptodon petaliferus
  • †Glyptotherium
    • †Glyptotherium arizonae
    • †Glyptotherium texanum
  • †Glyptotoma
    • †Glyptotoma conradiana
    • †Glyptotoma crassiplicata
  • Glyptozaria
    • †Glyptozaria americanae – type locality for species
  • †Gnathabelodon – only reported species reclassified new genus Blancotherium.[4]
    • †Gnathabelodon buckneri – type locality for species. Later reclassified as Blancotherium buckneri[5]
  • †Gomphopages
    • †Gomphopages turneri
  • Mounted fossilized skeleton of the Miocene-Pleistocene elephant relative Gomphotherium
    †Gomphotherium
    • †Gomphotherium gratum – type locality for species
    • †Gomphotherium obscurum
  • †Goniobasis
    • †Goniobasis miocaenica
  • Gopherus – type locality for genus
    • †Gopherus canyonensis – type locality for species
    • †Gopherus hexagonatus
    • †Gopherus polyphemus – type locality for species
  • †Granocardium
  • Graptemys
    • †Graptemys geographica
  • Gregariella
    • †Gregariella ridgei – type locality for species
  • †Gregorymys
    • †Gregorymys riograndensis – type locality for species
  • †Gulfoceras
    • †Gulfoceras westfalli – type locality for species
  • Restorative portrait of the Eocene-Oligocene bear dog Gustafsonia
    †Gustafsonia
    • †Gustafsonia cognita
  • Guttulina
    • †Guttulina problema
  • Gyraulus

H
  • †Hadrianus
  • †Haimesiastraea
    • †Haimesiastraea conferta
  • †Haplaletes
    • †Haplaletes disceptatrix
  • †Haploconus
    • †Haploconus angustus
  • Haplocytheridea
    • †Haplocytheridea habropapillosa
    • †Haplocytheridea lisbonensis
    • †Haplocytheridea stenzeli
  • Fossilized mandible of the Eocene horse Haplohippus
    †Haplohippus
    • †Haplohippus texanus
  • Harpa
  • †Harpactocarcinus
    • †Harpactocarcinus americanus
    • †Harpactocarcinus rathbunnae
  • †Harpagolestes
    • †Harpagolestes uintensis
  • †Harrisianella
    • †Harrisianella plicifera
  • Shells in differing orientations of Hastula augur sea snails
    Hastula
    • †Hastula ampulla – type locality for species
    • †Hastula houstonia
    • †Hastula longifera – type locality for species
    • †Hastula milamensis – type locality for species
    • †Hastula sabina
    • †Hastula venusta
  • Haustator
    • †Haustator infans
    • †Haustator rina
  • Hawaiia
  • †Hawiia
    • †Hawiia minuscula
  • Life restoration of the Pleistocene pronghorn Hayoceros
    †Hayoceros
    • †Hayoceros falkenbachi
  • Helicina
  • Helicodiscus
  • †Heliconoides
    • †Heliconoides auriformis – type locality for species
  • Helisoma
  • Heloderma
    • †Heloderma texana – type locality for species
  • †Helohyus
    • †Helohyus lentus – or unidentified comparable form
  • Fossilized lower jaw of the Miocene-Pleistocene llama relative Hemiauchenia
    †Hemiauchenia
    • †Hemiauchenia macrocephala
  • †Hemipsalodon
    • †Hemipsalodon viejaensis – type locality for species
  • †Hendryomeryx
    • †Hendryomeryx defordi
    • †Hendryomeryx wilsoni
  • †Heptacodon
    • †Heptacodon yeguaensis – type locality for species
  • †Hercoglossa
    • †Hercoglossa – type locality for species A informal
    • †Hercoglossa gardnerae
    • †Hercoglossa splendens
    • †Hercoglossa ulrichi
  • Life restoration of the Eocene-Miocene mammal Herpetotherium
    †Herpetotherium
  • †Hesperhys – tentative report
  • †Hesperiturris
    • †Hesperiturris monilis – type locality for species
    • †Hesperiturris nodocarinatus – type locality for species
  • †Hesperoscalops
    • †Hesperoscalops blancoensis
    • †Hesperoscalops rexroadi
    • †Hesperoscalops ruficervus
  • †Hesperotestudo
    • †Hesperotestudo crassiscutata – type locality for species
    • †Hesperotestudo johnstoni – type locality for species
    • †Hesperotestudo turgida – type locality for species
    • †Hesperotestudo wilsoni
  • †Hessolestes
  • †Heteraletes
    • †Heteraletes leotanus – or unidentified comparable form
  • Heterodon
    • †Heterodon nasicus – or unidentified comparable form
    • †Heterodon platyrhinos – or unidentified comparable form
  • †Heteromeryx
    • †Heteromeryx dispar
  • Hexaplex
    • †Hexaplex colei
    • †Hexaplex eoa – type locality for species
    • †Hexaplex silvaticus
    • †Hexaplex texanus – type locality for species
    • †Hexaplex vanuxemi
  • †Hexobelomeryx – tentative report
  • Life restoration of a herd of the Miocene-Pleistocene horse Hipparion. Heinrich Harder (1920).
    †Hipparion
    • †Hipparion brevidontus
    • †Hipparion shirleyae
    • †Hipparion tehonense
  • †Hippidion
  • Hippodamia
  • Hipponix
    • †Hipponix pygmaeus
  • †Hippotherium
  • Holbrookia
  • Life restoration of the Pleistocene armadillo relative Holmesina with a human to scale
    †Holmesina
    • †Holmesina septentrionalis
  • †Homotherium
    • †Homotherium johnstoni
    • †Homotherium serum
  • †Hyaenodon
    • †Hyaenodon crucians
    • †Hyaenodon horridus – or unidentified comparable form
    • †Hyaenodon montanus
    • †Hyaenodon raineyi
    • †Hyaenodon vetus – or unidentified comparable form
  • Hyla
    • †Hyla holmani – type locality for species
    • †Hyla miocenica – type locality for species
  • †Hylomeryx
  • †Hyopsodus
    • †Hyopsodus paulus
    • †Hyopsodus uintensis – or unidentified comparable form
    • †Hyopsodus wortmani – or unidentified comparable form
  • Hyotissa
    • †Hyotissa offemanae – type locality for species
    • †Hyotissa offmanna
  • †Hypertragulus
    • †Hypertragulus heikeni – or unidentified comparable form
  • Life restoration of the Miocene horse Hypohippus. Heinrich Harder (1920).
    †Hypohippus
    • †Hypohippus affinis – type locality for species
  • †Hypolagus
    • †Hypolagus edensis
    • †Hypolagus fontinalis
    • †Hypolagus furlongi
    • †Hypolagus gidleyi
    • †Hypolagus regalis
    • †Hypolagus ringoldensis
    • †Hypolagus vetus
  • †Hyrachyus
    • †Hyrachyus modestus – or unidentified comparable form
  • †Hyracodon
    • †Hyracodon medius
    • †Hyracodon petersoni
  • Life restoration of the Eocene horse Eohippus. Heinrich Harder (1920).
    †Hyracotherium
    • †Hyracotherium vasacciense

I
  • †Icacorea
    • †Icacorea prepaniculata
  • Ictalurus
    • †Ictalurus punctatus
  • †Ictiobus
  • †Ignacius
    • †Ignacius frugivorus
  • Fossilized skull of the Miocene bear Indarctos
    †Indarctos
  • †Infracoronia
    • †Infracoronia ludoviciana
  • †Inga
    • †Inga laurinafolia
  • †Ischnognathus
    • †Ischnognathus savagei – type locality for species
  • †Ischyrocyon
    • †Ischyrocyon gidleyi – type locality for species
  • †Ischyromys
    • †Ischyromys blacki – type locality for species
  • Isognomon

J
  • †Jefitchia – type locality for genus
    • †Jefitchia copelandi – type locality for species
  • †Jepsenella
  • †Jimomys
    • †Jimomys labaughi
  • Juglans
    • †Juglans bastropensis
  • Jupiteria
    • †Jupiteria smirna

K
  • Restoration of the Oligocene-Miocene horse Kalobatippus
    †Kalobatippus
    • †Kalobatippus australis
  • †Kansasimys
    • †Kansasimys dubius
  • †Kapalmerella
    • †Kapalmerella arenicola
    • †Kapalmerella dumblei
    • †Kapalmerella mortoni
    • †Kapalmerella pleboides
  • Katherinella
    • †Katherinella smithvillensis
    • †Katherinella texitrina
    • †Katherinella trinitatis
  • Kelliella
    • †Kelliella aldrichi
    • †Kelliella evansi
  • Kellyella
    • †Kellyella texana – type locality for species
  • Kinosternon
    • †Kinosternon flavescens
  • Fossilized "worm" tube, possibly of the Oligocene-modern shipworm marine bivalve genus Kuphus
    Kuphus

L
  • †Lacinia
    • †Lacinia alveata
  • †Lacunaria
    • †Lacunaria lithae
  • †Laevibuccinum
    • †Laevibuccinum constrictum
    • †Laevibuccinum lineatum
  • †Lambdoceras
    • †Lambdoceras trinitiensis
  • †Lambertocyon
    • †Lambertocyon eximius
  • A living Lampropeltis getula, or eastern kingsnake
    Lampropeltis
    • †Lampropeltis getulus
    • †Lampropeltis triangulum
  • †Langiopollis
    • †Langiopollis eocaenica
  • †Lapparia
    • †Lapparia crassa
    • †Lapparia dumosa
    • †Lapparia elongata
    • †Lapparia mooreana
    • †Lapparia nuda
  • †Laredochoerus – type locality for genus
    • †Laredochoerus edwardsi – type locality for species
  • †Laredomys
    • †Laredomys riograndensis – type locality for species
  • Lasionycteris
    • †Lasionycteris noctivagans
  • Lasiurus
    • †Lasiurus borealis
  • Two views of a shell of a Latirus sea snail
    Latirus
    • †Latirus humilior
    • †Latirus moorei
    • †Latirus ostrarupis
    • †Latirus sexcostatus
    • †Latirus stephensoni
    • †Latirus traceyi – type locality for species
  • †Latrius
    • †Latrius traceyi – type locality for species
  • †Ledina
    • †Ledina smirna
    • †Ledina turgeo – type locality for species
  • †Leea
  • Lepisosteus
    • †Lepisosteus spatula – or unidentified comparable form
  • Lepomis
    • †Lepomis cyanellus – or unidentified comparable form
  • †Leptarctus
    • †Leptarctus supremus – type locality for species
  • †Leptictis
    • †Leptictis douglassi – type locality for species
    • †Leptictis wilsoni – type locality for species
  • Illustration of a fossilized skull of the Oligocene-Miocene dog Leptocyon
    †Leptocyon
    • †Leptocyon vafer
  • †Leptoreodon
    • †Leptoreodon edwardsi
    • †Leptoreodon leptolophus
    • †Leptoreodon major
    • †Leptoreodon marshi
    • †Leptoreodon pusillus
  • †Leptosurcula
    • †Leptosurcula beadata
    • †Leptosurcula carinata – type locality for species
  • †Leptotomus
  • Lepus
    • Lepus californicus, or black-tailed jackrabbit
      †Lepus californicus
  • †Levifusus
    • †Levifusus dalei – tentative report
    • †Levifusus hubbardi
    • †Levifusus identus
    • †Levifusus irrasus
    • †Levifusus lithae
    • †Levifusus mortoniopsis
    • †Levifusus pagodiformis
    • †Levifusus serrae – type locality for species
    • †Levifusus supraplanus
    • †Levifusus trabeatus
  • Limacina
    • †Limacina stenzeli – type locality for species
    • †Limacina taylori
  • Living Limaria, or file shells
    Limaria
    • †Limaria petropolitana
    • †Limaria smithvillensis
  • †Limnenetes
    • †Limnenetes platyceps – or unidentified comparable form
  • Limopsis
    • †Limopsis quihi
    • †Limopsis radiata
  • †Linthia
    • †Linthia alabamensis
  • †Lirodiscus
    • †Lirodiscus jacksonensis
    • †Lirodiscus smithvillensis
  • †Lirofusus
    • †Lirofusus subtenuis
  • Shell of a Lithophaga, or date mussel
    Lithophaga
  • †Lithophysema
    • †Lithophysema grande
  • Litiopa
    • †Litiopa texana – type locality for species
  • †Litorhadia
    • †Litorhadia aldrichiana
    • †Litorhadia bastropensis
    • †Litorhadia compsa
    • †Litorhadia evanescentior
    • †Litorhadia milamensis – type locality for species
    • †Litorhadia petropolitana
    • †Litorhadia undulata – type locality for species
    • †Litorhadia valdefragilis – type locality for species
  • †Litoyoderimys
    • †Litoyoderimys lustrorum
  • Littorina
    • †Littorina eofasciata – type locality for species
  • †Longirostromeryx
    • †Longirostromeryx clarendonensis – type locality for species
    • †Longirostromeryx wellsi
  • Shell of a Lovenia sea urchin
    Lovenia
    • †Lovenia alabamensis
  • Loxoconcha
    • †Loxoconcha delicata
  • Lucina
    • †Lucina subcurta
  • Lucinisca
  • Lunatia – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Lunatia moorei
  • Lunularia – tentative report
  • Lunulites
    • †Lunulites bouei
    • †Lunulites ligulata
    • †Lunulites truncata
  • †Lygodiumsporites
    • †Lygodiumsporites adriennis
  • Lymnaea
    • †Lymnaea caperata
    • †Lymnaea dalli
    • †Lymnaea modicella
    • †Lymnaea obrussa
  • Lynx
    • †Lynx proterolyncis
    • A living Lynx rufus, or bobcat
      †Lynx rufus
  • Lyria
  • †Lyrosurcula
    • †Lyrosurcula gibbera
    • †Lyrosurcula vaughani
  • Lytta

M
  • Fossilized cranium of the Miocene-Pleistocene saber-toothed cat Machairodus
    †Machairodus
    • †Machairodus catocopis
  • Macrocallista
    • †Macrocallista triangulata – type locality for species
  • †Macrotarsius
    • †Macrotarsius jepseni – or unidentified comparable form
  • Mactra
  • Madracis
    • †Madracis gregorioi
    • †Madracis herricki – type locality for species
    • †Madracis johnsoni – type locality for species
  • Madrepora
    • †Madrepora natchitochensis
  • Magnolia
    • †Magnolia leei
  • †Mahgarita
    • †Mahgarita stevensi – type locality for species
  • †Malaquiferus – tentative report
  • †Mammut
    • †Mammut americanum
  • †Mammuthus
    • Life restoration of a herd of Mammuthus columbi, or Columbian mammoths. The extent of the fur depicted is hypothetical. Charles R. Knight (1909).
      †Mammuthus columbi
    • †Mammuthus hayi
  • Marginella
    • †Marginella carnea
    • †Marginella constrictoides
  • Marmota
    • †Marmota flaviventris
  • †Marshochoerus
    • †Marshochoerus socialis
  • Martes
  • Martesia
    • †Martesia laredoensis
    • †Martesia texana
  • †Martinogale
    • †Martinogale chisoensis
  • †Mathilda
    • †Mathilda claibornensis
    • †Mathilda cribraea – type locality for species
    • †Mathilda iugum – type locality for species
    • †Mathilda retisculpta
  • †Mauricia
    • †Mauricia houstonia
    • †Mauricia leonia
  • †Mazzalina
    • †Mazzalina conica – type locality for species
    • †Mazzalina plena
  • †Megalictis – tentative report
  • †Megalonyx
    • †Megalonyx jeffersonii – or unidentified comparable form
    • †Megalonyx leptostomus
  • Restoration of the Pliocene-Holocene ground sloth Megatherium. Robert Bruce Horsfall (1913).
    †Megatherium
    • †Megatherium mirabite
  • †Megatylopus
    • †Megatylopus matthewi – type locality for species
    • †Megatylopus primaevus
  • Melanella
    • †Melanella extremis – or unidentified related form
    • †Melanella minutissima – type locality for species
    • †Melanella notata – or unidentified comparable form
    • †Melanella wheeleri
  • †Meliakrouniomys
    • †Meliakrouniomys wilsoni – type locality for species
  • Meliosma[3]
    • †Meliosma berryi – type locality for species[3]
  • †Menetus
    • †Menetus dilataus
  • Life restoration of the Miocene rhinoceros Menoceras
    †Menoceras
    • †Menoceras barbouri
  • †Menops
    • †Menops bakeri
  • Mephitis
    • †Mephitis mephitis
  • Meretrix
    • †Meretrix nuttelliopsis
  • †Merychippus
    • †Merychippus gunteri
    • †Merychippus insignis – or unidentified comparable form
    • †Merychippus sejunctus
    • †Merychippus shirleyae
  • †Merychyus
    • †Merychyus calaminthus – or unidentified comparable form
    • †Merychyus novomexicanus
  • Restoration of the Eocene-Oligocene oreodont mammal Merycoidodon. Heinrich Harder (1920).
    †Merycoidodon
    • †Merycoidodon culbertsoni
    • †Merycoidodon presidioensis
  • Mesalia
    • †Mesalia alabamiensis
    • †Mesalia allentonensis
    • †Mesalia biplicata
    • †Mesalia claibornensis
    • †Mesalia mavericki
  • †Mescalerolemur – type locality for genus
    • †Mescalerolemur horneri – type locality for species
  • Mesodesma
    • †Mesodesma singleyi
  • †Mesodma
    • †Mesodma pygmaea – or unidentified comparable form
    • †Mesodma thompsoni
  • †Mesohippus
    • †Mesohippus texanus
  • †Mesomphix
  • †Metalopex
    • †Metalopex bakeri – type locality for species
  • Restoration of the Eocene-Miocene swamp rhinoceros Metamynodon. Charles R. Knight (1896).
    †Metamynodon
    • †Metamynodon chadronensis
    • †Metamynodon mckinneyi – type locality for species
  • Metula
    • †Metula brazosensis
    • †Metula elongatoides – type locality for species
    • †Metula gracilis
    • †Metula reticulata – type locality for species
  • †Michela
    • †Michela trabeatoides – type locality for species
  • †Michenia
    • †Michenia exilis – type locality for species
  • Shell in multiple views of a Microdrillia sea snail
    Microdrillia
    • †Microdrillia aldrichella
    • †Microdrillia aldrichiella
    • †Microdrillia elongatula
    • †Microdrillia harrisi
    • †Microdrillia infans
    • †Microdrillia laeviplicata
    • †Microdrillia parthenoides
    • †Microdrillia robustula – or unidentified related form
    • †Microdrillia rostratula
    • †Microdrillia solidula
  • †Microeutypomys
    • †Microeutypomys karenae – type locality for species
  • †Microparamys
    • †Microparamys minutus
    • †Microparamys perfossus
  • Illustration of a living Micropterus, or black bass
    Micropterus
  • †Microsurcula
    • †Microsurcula iuventae – type locality for species
  • †Microsyops
    • †Microsyops annectens
  • †Microtomarctus
    • †Microtomarctus conferta
  • Microtus
    • †Microtus australis
    • †Microtus llanensis
    • †Microtus meadensis
    • †Microtus mexicanus
    • †Microtus paroperarius
    • †Microtus pennsylvanicus
    • †Microtus pinetorum
  • Micrurus
  • Mictomys
    • †Mictomys meltoni
  • Miltha
    • †Miltha albaripus
  • †Mimetodon
    • †Mimetodon silberlingi
  • †Minippus
    • †Minippus index
  • †Mioclaenus
    • †Mioclaenus opisthacus
  • †Miocoluber – type locality for genus
    • †Miocoluber dalquesti – type locality for species
  • †Miocyon
    • †Miocyon scotti – or unidentified comparable form
    • †Miocyon vallisrubrae
  • †Miohippus
  • †Miolabis
  • †Mionictis
  • Restoration of the Pliocene-Pleistocene Miracinonyx, or American cheetah
    †Miracinonyx
    • †Miracinonyx inexpectatus – or unidentified comparable form
    • †Miracinonyx studeri
  • Mitrella
    • †Mitrella bastropensis
    • †Mitrella nuttalli – type locality for species
    • †Mitrella texana – type locality for species
  • †Mixodectes
    • †Mixodectes malaris
  • Mnestia
    • †Mnestia confusa – type locality for species
    • †Mnestia dekayi
    • †Mnestia ovata – type locality for species
    • †Mnestia rotunda – type locality for species
  • Modiolus – tentative report
  • †Monoptygma
    • †Monoptygma crassiplicum
  • Montastrea
    • †Montastrea intermedia
  • Life restoration of the Miocene chalicothere mammal Moropus threatening a pair of the bear-dog Daphoenodon. Jay Matternes (1964).
    †Moropus
    • †Moropus oregonensis – or unidentified comparable form
  • †Morrillia
    • †Morrillia barbouri
  • Murex
    • †Murex fusates
    • †Murex mansfieldi
  • Mustela
    • †Mustela rexroadensis
    • †Mustela vison
  • Myctophum
    • †Myctophum americanum – type locality for species
  • Myliobatis
  • Fossilized skeleton of the Pliocene-Holocene peccary Mylohyus
    †Mylohyus
    • †Mylohyus fossilis
  • Myotis
    • †Myotis lucifugus
    • †Myotis velifer
  • Myrtea
    • †Myrtea curta
    • †Myrtea mesakta
    • †Myrtea uhleri – or unidentified comparable form
  • Mytilus
  • †Mytonomys
    • †Mytonomys coelumensis
    • †Mytonomys robustus
  • Myzinum – or unidentified comparable form

N
  • Partial fossilized mandible of the Miocene-Pliocene horse Nannippus
    †Nannippus
    • †Nannippus aztecus
    • †Nannippus beckensis – type locality for species
    • †Nannippus lenticularis
    • †Nannippus peninsulatus
  • †Nannodectes
    • †Nannodectes gidleyi – or unidentified related form
  • †Nanotragulus
    • †Nanotragulus ordinatus
  • Narona
    • †Narona greggi
  • Nassarius
    • †Nassarius emoryi
    • †Nassarius exilis
    • †Nassarius nodosa – type locality for species
    • †Nassarius seguinensis – type locality for species
  • A living Nasua, or coati
    Nasua
    • †Nasua pronarica – type locality for species
  • Natica
    • †Natica aperta
    • †Natica brevisulcata – type locality for species
    • †Natica clarkeana
    • †Natica moffitti – type locality for species
    • †Natica moorei
    • †Natica permunda
    • †Natica perspecta
    • †Natica reversa
    • †Natica saffordia
  • A living Naticarius moon sea snail
    Naticarius
    • †Naticarius reversa
    • †Naticarius semilunata
  • Natrix
    • †Natrix erythrogaster
  • †Navajovius
    • †Navajovius kohlhaasae
  • Nectandra
    • †Nectandra lancifolia
  • †Nekrolagus
    • †Nekrolagus progressus
  • Nemocardium
    • †Nemocardium actium
    • †Nemocardium gambrinum
    • †Nemocardium quihi
  • †Nemodon
    • †Nemodon eufaulensis
  • †Neochoerus – type locality for genus
  • Neofiber
    • †Neofiber leonardi
  • Life restoration of a herd of Neohipparion. Robert Bruce Horsfall (1913).
    †Neohipparion
    • †Neohipparion affine
    • †Neohipparion eurystyle – type locality for species
    • †Neohipparion leptode
  • †Neonatrix
    • †Neonatrix elongata
    • †Neonatrix infera – type locality for species
  • Neotamias
    • †Neotamias cinereicollis
  • Neotoma
    • †Neotoma albigula
    • †Neotoma floridana
    • †Neotoma fossilis – or unidentified comparable form
    • †Neotoma mexicana
    • A living Neotoma micropus, or southern Plains woodrat
      †Neotoma micropus
    • †Neotoma minutus
    • †Neotoma quadriplicata
  • †Neozanthopsis
    • †Neozanthopsis americanus
  • Neptunea – report made of unidentified related form or using admittedly obsolete nomenclature
  • Nerodia
    • †Nerodia fasciata
  • †Nerterogeomys
    • †Nerterogeomys paenebursarius
  • Neverita
  • †Nexuotapirus
    • †Nexuotapirus marslandensis
  • Fossilized partial cranium of the Miocene saber-toothed cat Nimravides
    †Nimravides
    • †Nimravides hibbardi – type locality for species
    • †Nimravides thinobates – or unidentified comparable form
  • Niptus
    • †Niptus abstrusus
  • †Nonomys
    • †Nonomys simplicidens
  • Norrisia
    • †Norrisia micromphala
  • †Notharctus
  • †Nothokemas
    • †Nothokemas floridanus
    • †Nothokemas hidalgensis – type locality for species
  • †Nothotylopus
    • †Nothotylopus camptognathus
  • Life restoration of the Pleistocene ground sloth Nothrotheriops
    †Nothrotheriops
    • †Nothrotheriops texanus
  • †Nothrotherium
    • †Nothrotherium shastense
  • Notiosorex
    • †Notiosorex crawfordi
    • †Notiosorex jacksoni
  • †Notiotitanops
    • †Notiotitanops mississippiensis
  • †Notolagus
    • †Notolagus lepusculus
  • Notophthalmus
    • †Notophthalmus slaughteri – type locality for species
  • Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula
    Nucula
    • †Nucula cochlear – type locality for species
    • †Nucula magnifica
    • †Nucula mauricensis
    • †Nucula mediavia
    • †Nucula smithvillensis
  • Nuculana
    • †Nuculana aldrichiana
    • †Nuculana corpulentoides
    • †Nuculana demissa – type locality for species
    • †Nuculana eoa
    • †Nuculana jewetti
    • †Nuculana milamensis
    • †Nuculana ovula
    • †Nuculana saffordana
    • †Nuculana smithvillensis – or unidentified related form
    • †Nuculana travisana – or unidentified comparable form
    • †Nuculana trivitate
    • †Nuculana turgeo – type locality for species
  • †Nudivagus
  • †Nuulana
    • †Nuulana turgeo – type locality for species
  • Nysius – tentative report

O
  • Oculina
    • †Oculina singleyi – type locality for species
  • Odocoileus
    • A living Odocoileus virginianus, or white-tailed deer
      †Odocoileus virginianus
  • Odontaspis
    • †Odontaspis exilis – type locality for species
  • †Odontopolys
    • †Odontopolys compsorhytis
  • Odostomia
    • †Odostomia ova – type locality for species
    • †Odostomia trapaquara
  • Ogmodontomys
    • †Ogmodontomys poaphagus
  • †Ogmophis
    • †Ogmophis miocompactus
  • Olivella
    • †Olivella mediavia
  • †Omomys
    • †Omomys carteri
    • †Omomys lloydi
  • A living Ondatra, or muskrat
    Ondatra
    • †Ondatra annectens
    • †Ondatra idahoensis – or unidentified comparable form
    • †Ondatra zibethicus
  • Onychomys
    • †Onychomys gidleyi
    • †Onychomys hollisteri
    • †Onychomys leucogaster
    • †Onychomys pedroensis
    • †Onychomys torridus
  • Opalia
    • †Opalia cooperi – type locality for species
  • Opheodrys
  • Ophisaurus
  • †Oreodaphne
    • †Oreodaphne obtusifolia
    • †Oreodaphne perseaformis
    • †Oreodaphne pseudoguianensis
  • †Oromeryx
  • †Orthosurcula
    • †Orthosurcula adeona
    • †Orthosurcula francescae
    • †Orthosurcula indenta
    • †Orthosurcula langdoni – or unidentified comparable form
    • †Orthosurcula longipersa
    • †Orthosurcula persa
    • †Orthosurcula phoenicea
  • Orthoyoldia
    • †Orthoyoldia petropolitana
    • †Orthoyoldia psammotaea
  • Oryzomys
    • †Oryzomys palustris
  • Life restoration of the Miocene pronghorn Osbornoceros
    †Osbornoceros – tentative report
  • Ostrea
    • †Ostrea crenulimarginata
    • †Ostrea duvali
    • †Ostrea frithi
    • †Ostrea kochae
    • †Ostrea multilirata
    • †Ostrea normalis
    • †Ostrea pulaskensis
    • †Ostrea semmesi
    • †Ostrea sinuosa
  • Otionella
    • †Otionella tuberosa
  • †Otostomia
    • †Otostomia melanella
    • †Otostomia trapaquara
  • †Ourayia
    • †Ourayia hopsoni
    • †Ourayia uintensis
  • Ovis
    • †Ovis canadensis
  • Life restoration of a pair of the Oligocene-Miocene camel Oxydactylus. Robert Bruce Horsfall (1913).
    †Oxydactylus
    • †Oxydactylus benedentatus – type locality for species

P
  • †Pachecoa
    • †Pachecoa adamsi
    • †Pachecoa concentrica – type locality for species
    • †Pachecoa decisa
    • †Pachecoa microcancellata
    • †Pachecoa ovalis
    • †Pachecoa pulchra
    • †Pachecoa sabinica
    • †Pachecoa smithvillensis
  • †Paenemarmota
    • †Paenemarmota barbouri
  • †Palaechthon
    • †Palaechthon woodi – or unidentified comparable form
  • †Palaeictops – tentative report
  • †Palaeolama
    • †Palaeolama mirifica
  • Restoration of the Cretaceous-Eocene sea snake Palaeophis
    †Palaeophis
  • †Palaeorhaphis
    • †Palaeorhaphis palaeocenica – type locality for species
  • †Paleoheterodon
    • †Paleoheterodon tiheni
  • †Paleotomus
    • †Paleotomus senior
  • Panopea
  • Panthera
    • †Panthera leo
    • †Panthera onca
  • †Papillina
    • †Papillina dumosa
  • †Paracryptotis
    • †Paracryptotis rex
  • Paracyathus
    • †Paracyathus alternatus
    • †Paracyathus bastropensis – type locality for species
  • †Paraenhydrocyon
    • †Paraenhydrocyon wallovianus
  • †Parahippus
  • †Parahyus
    • †Parahyus vagus
  • †Paralbula
    • †Paralbula marylandica
  • †Paramerychyus
    • †Paramerychyus harrisonensis
  • Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
    †Paramylodon
    • †Paramylodon harlani
  • †Paramys
    • †Paramys delicatior – or unidentified comparable form
    • †Paramys excavatus
    • †Paramys leptodus
  • †Paraoreomunea
  • †Parapavo
    • †Parapavo californicus
  • †Parapotos – type locality for genus
    • †Parapotos tedfordi – type locality for species
  • †Paratoceras
    • †Paratoceras macadamsi – type locality for species
    • †Paratoceras wardi – type locality for species
  • †Paratomarctus
    • †Paratomarctus euthos
    • †Paratomarctus temerarius
  • Parbatmya – type locality for genus
    • †Parbatmya brazosensis
    • †Parbatmya fornicata – type locality for species
  • †Parectypodus
    • †Parectypodus sloani
  • †Pareumys
    • †Pareumys boskeyi
  • †Paronychomys – tentative report
  • †Parvitragulus
    • †Parvitragulus priscus
  • †Parvobalanus – type locality for genus
    • †Parvobalanus gracilis – type locality for species
  • †Patulaxis
    • †Patulaxis scrobiculata
  • †Pauromys
    • †Pauromys simplex – type locality for species
    • †Pauromys texensis
  • †Pediomeryx
    • †Pediomeryx hemphillensis – type locality for species
  • Fossilized skull of the Eocene-Oligocene lizard Peltosaurus
    †Peltosaurus – tentative report
  • †Penetrigonias
    • †Penetrigonias dakotensis
  • †Peraceras
    • †Peraceras hessei
    • †Peraceras superciliosum
  • †Peradectes – tentative report
  • †Peratherium
    • †Peratherium comstocki
    • †Peratherium marsupium
  • Periploma
    • †Periploma collardi
    • †Periploma howei
  • †Periptychus
    • †Periptychus carinidens
  • Perognathus
    • †Perognathus carpenteri – type locality for species
    • A living Perognathus flavus, or silky pocket mouse
      †Perognathus flavus
    • †Perognathus pearlettensis
    • †Perognathus rexroadensis – or unidentified comparable form
  • Peromyscus
    • †Peromyscus boylii
    • †Peromyscus cragini
    • †Peromyscus difficilis
    • †Peromyscus eremicus
    • †Peromyscus gossypinus
    • †Peromyscus kansasensis
    • †Peromyscus leucopus
    • †Peromyscus maniculatus
    • †Peromyscus pectoralis
    • †Peromyscus progressus – or unidentified comparable form
  • †Petauristodon
    • †Petauristodon jamesi
    • †Petauristodon minimus – or unidentified comparable form
  • Petrophyllia
    • †Petrophyllia singleyi
  • †Pewelagus
    • †Pewelagus dawsonae
  • Phacoides
  • Phaedon – or unidentified comparable form
  • Phalium
    • †Phalium brevicostatum
    • †Phalium reklawensis – type locality for species
  • †Phelopteria
  • Life restoration of the Paleocene-Eocene ungulate Phenacodus. Charles R. Knight (1898).
    †Phenacodus
    • †Phenacodus bisonensis
    • †Phenacodus grangeri
    • †Phenacodus matthewi
  • Philine
  • †Phlaocyon
  • Pholadomya
    • †Pholadomya harrisi
    • †Pholadomya leonensis
    • †Pholadomya petropolitana
  • Pholas
  • Phos
    • †Phos sagenum
    • †Phos texanum
  • Phrynosoma
    • †Phrynosoma cornutum
  • Phyllodus
  • Physa
    • †Physa anatina
    • †Physa gyrina
  • †Physocypria
    • †Physocypria pustulosa
  • Pinna – tentative report
  • Pisidium
  • Shell of a Pitar venus clam
    Pitar
    • †Pitar angelinae
    • †Pitar biboraensis
    • †Pitar gazleyensis
    • †Pitar hawtofi
    • †Pitar juliae
    • †Pitar kempae
    • †Pitar nuttalliopsis
    • †Pitar petropolitanus
    • †Pitar pteleina
    • †Pitar pteleinus
    • †Pitar ripleyanus
    • †Pitar texacola
    • †Pitar texibrazus
    • †Pitar tornadonis
    • †Pitar trigoniata
    • †Pitar turneri – type locality for species
  • Pituophis
  • †Plagiarca
    • †Plagiarca rhomboidella
    • †Plagiarca vaughani
  • Plagiocardium – or unidentified comparable form
  • Planorbis
    • †Planorbis andersoni
  • †Planorbula
    • †Planorbula armigera
  • Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922).
    †Platygonus
  • Platytrochus
    • †Platytrochus primaevus – type locality for species
    • †Platytrochus stokesi
  • †Pleiolama
    • †Pleiolama vera
  • †Plesiocolopirus
    • †Plesiocolopirus hancocki – or unidentified comparable form
  • †Plesiogulo
    • †Plesiogulo marshalli
  • †Plesiolestes
    • †Plesiolestes nacimienti
  • †Plesiosminthus
  • †Pleuofusia – tentative report
    • †Pleuofusia huppertzi – type locality for species
  • Pleurocera
    • †Pleurocera acutum
  • Pleurofusia
    • †Pleurofusia huppertzi
    • †Pleurofusia longirostropis
    • †Pleurofusia prosseri
  • †Pleurolicus
    • †Pleurolicus sellardsi
  • †Pleuroliria
  • Pleuromeris
    • †Pleuromeris leonensis
  • Shell in multiple views of a Pleuroploca sea snail
    Pleuroploca
    • †Pleuroploca plummeri – or unidentified related form
  • †Pleurostoma
    • †Pleurostoma adolescens
  • Pleurotomella
    • †Pleurotomella veatchi
    • †Pleurotomella whitfieldi
  • Plicatula
    • †Plicatula filamentosa
    • †Plicatula pustula – type locality for species
  • Pliciscala
    • †Pliciscala albitesta
  • †Plinthicus
  • Fossilized skull of the Miocene horse Pliohippus
    †Pliohippus
    • †Pliohippus fossulatus
    • †Pliohippus nobilis
    • †Pliohippus pernix
    • †Pliohippus spectans – tentative report
  • †Pliometanastes
    • †Pliometanastes protistus – or unidentified comparable form
  • †Pliosaccomys
    • †Pliosaccomys higginsensis
  • †Pliotaxidea
    • †Pliotaxidea nevadensis – or unidentified comparable form
  • †Plotophysops – tentative report
    • †Plotophysops angularis – type locality for species
  • †Poabromylus
    • †Poabromylus kayi
  • Podomys
    • †Podomys oklahomensis
  • Life restoration of the Eocene-Oligocene camel Poebrotherium
    †Poebrotherium
    • †Poebrotherium chadronense – type locality for species
    • †Poebrotherium franki – type locality for species
  • †Polidevcia
    • †Polidevcia magna
  • Polinices
    • †Polinices aratus
    • †Polinices eminulus
    • †Polinices harrisii
    • †Polinices julianna
    • †Polinices onustus – type locality for species
  • Polydora
  • Polygyra
    • †Polygyra texasiana
  • Polymorphina
    • †Polymorphina gibba
    • †Polymorphina regularis
  • Polyschides
    • †Polyschides margarita
  • Living Porites stony coral
    Porites
    • †Porites douvillei
  • Poromya – or unidentified related form
  • †Postalia
    • †Postalia americana – type locality for species
  • †Potamides
    • †Potamides matsoni
  • †Pratilepus
    • †Pratilepus kansasensis
  • †Preophidion – type locality for genus
    • †Preophidion petropolis
    • †Preophidion stintoni – type locality for species
  • Prionocidaris
    • †Prionocidaris cojimarensis
  • †Priscocamelus
    • †Priscocamelus wilsoni
  • †Priscoficus
    • †Priscoficus juvenis
  • †Pristichampsus
  • Pristis
  • †Probassariscus
  • †Problastomeryx
    • †Problastomeryx primus
  • †Procamelus
    • †Procamelus grandis
    • †Procamelus leptognathus
    • †Procamelus occidentalis
  • †Procastoroides
    • †Procastoroides sweeti
  • †Procynodictis
    • †Procynodictis vulpiceps – or unidentified comparable form
  • Procyon
    • †Procyon lotor
    • †Procyon rexroadensis
  • †Prodipodomys
    • †Prodipodomys centralis
  • †Progeomys
    • †Progeomys sulcatus – type locality for species
  • †Prohesperocyon
    • †Prohesperocyon wilsoni
  • †Proheteromys
    • †Proheteromys sabinensis – type locality for species
    • †Proheteromys toledoensis – type locality for species
  • †Prolapsus
    • †Prolapsus junctionis – type locality for species
    • †Prolapsus sibilatoris – type locality for species
  • †Promathildia
    • †Promathildia parvilis – or unidentified comparable form
    • †Promathildia parvula – or unidentified comparable form
  • Promenetus
    • †Promenetus exacuous
  • †Promioclaenus
    • †Promioclaenus acolytus
  • †Proneofiber
    • †Proneofiber guildayi – type locality for species
  • Fossilized shells of the Triassic-modern marine bivalve Propeamussium
    Propeamussium
    • †Propeamussium alabamense
  • †Prosigmodon
  • †Prosimnia
    • †Prosimnia naviculae
  • †Prosthennops
    • †Prosthennops serus
    • †Prosthennops xiphodonticus
  • †Prosynthetoceras
    • †Prosynthetoceras francisi – type locality for species
    • †Prosynthetoceras orthrionanus – type locality for species
    • †Prosynthetoceras texanus – type locality for species
  • †Proterixoides
  • †Prothryptacodon
  • †Protictis
  • Restorative models in multiple views of the Eocene brontothere Protitanotherium (figure 3)
    †Protitanotherium
    • †Protitanotherium emarginatum
  • †Protoceras – tentative report
  • †Protocitta
    • †Protocitta ajax – type locality for species
  • †Protohippus
    • †Protohippus gidleyi
    • †Protohippus perditus
    • †Protohippus supremus – type locality for species
    • †Protohippus vetus
  • †Protolabis
    • †Protolabis coartatus
  • †Protoreodon
    • †Protoreodon parvus
    • †Protoreodon petersoni
    • †Protoreodon pumilus
  • †Protosciurus
  • †Protoscutella
    • †Protoscutella mississippiensis
  • †Protoselene – or unidentified comparable form
  • †Protospermophilus
    • †Protospermophilus quatalensis
  • †Protosurcula
    • †Protosurcula aurora – type locality for species
    • †Protosurcula gabbii
    • †Protosurcula tenuirostris
  • †Protylopus – tentative report
  • Pseudacris
    • †Pseudacris clarki
    • †Pseudacris ocularis
    • †Pseudacris streckeri
  • †Pseudaelurus – tentative report
  • Replica of a fossilized cranium of the Miocene horse Pseudhipparion
    †Pseudhipparion
    • †Pseudhipparion curtivallum
    • †Pseudhipparion hessei – type locality for species
    • †Pseudhipparion skinneri
  • †Pseudoceras
    • †Pseudoceras skinneri
  • Pseudochama
  • †Pseudocylindrodon
    • †Pseudocylindrodon neglectus
    • †Pseudocylindrodon pintoensis – or unidentified related form
    • †Pseudocylindrodon texanus – type locality for species
  • Pseudoliva
    • †Pseudoliva ostrarupis
    • †Pseudoliva santander
    • †Pseudoliva scalina
    • †Pseudoliva vetusta
  • Pseudomalaxis
    • †Pseudomalaxis acuta – type locality for species
    • †Pseudomalaxis plummerae
    • †Pseudomalaxis reklawensis – type locality for species
    • †Pseudomalaxis texana
  • †Pseudometula – type locality for genus
    • †Pseudometula gradus – type locality for species
  • †Pseudoparablastomeryx
    • †Pseudoparablastomeryx scotti
  • Fossilized skeleton of the Eocene protoceratid mammal Pseudoprotoceras
    †Pseudoprotoceras
    • †Pseudoprotoceras minor
  • †Pseudotheridomys
  • †Pseudotomus
    • †Pseudotomus johanniculi
    • †Pseudotomus petersoni – or unidentified comparable form
  • †Psittacotherium
    • †Psittacotherium multifragum
  • Pteria
    • †Pteria deusseni
    • †Pteria limula
    • †Pteria petropolitana
  • Pteris
    • †Pteris dentata
  • †Pteropsella
    • †Pteropsella lapidosa
    • †Pteropsella praelapidosa
  • †Pterosphenus
    • †Pterosphenus schucherti
  • Pterothrissus
    • †Pterothrissus truncatus
  • Pterynotus
    • †Pterynotus sabinola
    • †Pterynotus stenzeli – type locality for species
  • Illustration of a fossilized skull of the Paleocene multituberculate mammal Ptilodus
    †Ptilodus
    • †Ptilodus mediaevus
  • Ptinus
  • Puma
    • †Puma concolor
  • Pupilla
  • Pupoides
    • †Pupoides albilabris
  • Pycnodonte
    • †Pycnodonte sylvaerupis
  • †Pylodictis
    • A living Pylodictis olivaris, or flathead catfish
      †Pylodictis olivaris
  • Pyramidella
    • †Pyramidella bastropensis
    • †Pyramidella dalli
    • †Pyramidella filamentosa – type locality for species
    • †Pyramidella perexilis
    • †Pyramidella pirum – type locality for species
    • †Pyramidella propeacicula
    • †Pyramidella pseudopymaea
    • †Pyramidella tundrae – type locality for species
  • †Pyramimitra
    • †Pyramimitra eocenica – type locality for species
    • †Pyramimitra terebraeformis
  • †Pyricythereis
    • †Pyricythereis alabamensis
    • †Pyricythereis delicata – type locality for species
    • †Pyricythereis foveovalva – type locality for species
    • †Pyricythereis seminuda – type locality for species
    • †Pyricythereis smithvillensis – type locality for species
    • †Pyricythereis subtriangularis – type locality for species

Q
  • †Quadratomus
    • †Quadratomus gigans
  • A living Quadrula freshwater mussel
    †Quadrula
    • †Quadrula frustulosa
    • †Quadrula speciosa
  • Quinqueloculina
    • †Quinqueloculina claiborniana
    • †Quinqueloculina seminulum
    • †Quinqueloculina vulgaris

R
  • Raja
    • A living Raja texana also known as a roundel skate or Texas clearnose skate
      †Raja texana – type locality for species
  • †Rana
  • Ranularia
    • †Ranularia hula
  • Raphitoma
    • †Raphitoma bastropensis – type locality for species
    • †Raphitoma bellula
    • †Raphitoma fannae
    • †Raphitoma georgei – type locality for species
    • †Raphitoma iuventae – type locality for species
    • †Raphitoma rebecella
    • †Raphitoma sabinia
    • †Raphitoma specus
  • Reithrodontomys
    • †Reithrodontomys fulvescens
    • †Reithrodontomys megalotis
    • †Reithrodontomys montanus
    • †Reithrodontomys moorei
    • †Reithrodontomys rexroadensis – or unidentified comparable form
  • †Retinella
    • †Retinella indentata
  • A living Retusa barrel bubble sea snail
    Retusa
    • †Retusa adamsi
    • †Retusa adamski – or unidentified comparable form
    • †Retusa emoryi
    • †Retusa galba
    • †Retusa jacksonensis
    • †Retusa kellogii
    • †Retusa notata – type locality for species
    • †Retusa sylvaerupis
  • †Rhabdopitaria
    • †Rhabdopitaria astartoides
    • †Rhabdopitaria pricei
    • †Rhabdopitaria texangelina
  • Rhinobatos
  • Rhinocheilus
    • †Rhinocheilus lecontei
  • Rhinoptera
  • Rhizorus
    • †Rhizorus conradianus
    • †Rhizorus loisae
    • †Rhizorus minutissimus
    • †Rhizorus smithvillensis
    • †Rhizorus volutatus
  • Restoration of the Miocene-Pliocene elephant relative Rhynchotherium
    †Rhynchotherium – tentative report
  • Rimella
    • †Rimella laqueatus
    • †Rimella texanum
  • Ringicula
    • †Ringicula alabamensis
    • †Ringicula butleriana – tentative report
    • †Ringicula dubia
    • †Ringicula trapaquara
  • †Rooneyia – type locality for genus
    • †Rooneyia viejaensis – type locality for species
  • †Rotalia
    • †Rotalia beccarii
  • †Rotularia
  • †Rudiscala

S
  • Saccella
    • †Saccella atakta
  • Salvadora
    • †Salvadora paleolineata
  • †Sapindus
    • †Sapindus linearifolius
  • Shell of a Sassia triton sea snail
    Sassia
    • †Sassia nucleoides – type locality for species
    • †Sassia septemdentata
    • †Sassia septendentata
  • †Saxolucina
    • †Saxolucina claytonia
  • Scalina
    • †Scalina dolosa
    • †Scalina trapaquara
  • Scalopus
    • †Scalopus aquaticus
  • Scaphander
  • Scaphella
    • †Scaphella newcombiana
    • †Scaphella showalteri
  • A living Scaphiopus, or North American spadefoot toad
    Scaphiopus
  • †Scaphites
  • Sceloporus
    • †Sceloporus olivaceus
    • †Sceloporus undulatus
  • †Scenopagus
    • †Scenopagus edenensis – or unidentified comparable form
  • †Schedocardia
    • †Schedocardia hatchetigbeensis
  • †Schizorthosecos
    • †Schizorthosecos interstitia
  • Sciurus
    • A living Sciurus carolinensis, or eastern gray squirrel
      †Sciurus carolinensis
    • †Sciurus niger
  • Scobinella
    • †Scobinella reticulatoides
  • †Selaginella
  • Selenophorus – or unidentified comparable form
  • Semele
    • †Semele australina
  • †Semiactaeon
    • †Semiactaeon texanum – type locality for species
  • †Septastrea
    • †Septastrea kerioides – type locality for species
  • Serpulorbis
    • †Serpulorbis gonioides
    • †Serpulorbis multiclavus – type locality for species
  • Sigatica
    • †Sigatica harrisi
  • Sigmodon
    • †Sigmodon curtisi – or unidentified comparable form
    • A living Sigmodon hispidus, or hispid cotton rat
      †Sigmodon hispidus
    • †Sigmodon hudspethensis – type locality for species
    • †Sigmodon minor
  • †Signata – type locality for genus
    • †Signata nicoli – type locality for species
    • †Signata stenzeli – type locality for species
  • Siliqua
    • †Siliqua simondsi
  • †Simidectes
    • †Simidectes magnus
  • †Similisciurus
    • †Similisciurus maxwelli – type locality for species
  • †Simimys – or unidentified comparable form
  • Simnia
    • †Simnia texana
  • Sincola
    • †Sincola galvestonensis
  • Sinodia
    • †Sinodia eocaenica
  • Fossilized skeleton of the Eocene-Oligocene creodont mammal Sinopa
    †Sinopa
    • †Sinopa major
  • Sinum
    • †Sinum arctatum
    • †Sinum bilix
    • †Sinum declive
    • †Sinum fiski – type locality for species
    • †Sinum inconstans
    • †Sinum moveum – type locality for species
    • †Sinum taylori – type locality for species
  • Siphonalia
    • †Siphonalia newtonensis
    • †Siphonalia plummeri
  • Siren
    • †Siren miotexana – type locality for species
  • †Skaptotion
    • †Skaptotion reklawensis – type locality for species
  • Skena
    • †Skena pignus
  • Skenea
    • †Skenea dalli
  • Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
    †Smilodon
    • †Smilodon fatalis
  • †Soergelia
  • Solariella
    • †Solariella aldrichiana
    • †Solariella tricostata
  • Solariorbis
    • †Solariorbis conicus – type locality for species
    • †Solariorbis discoides – type locality for species
    • †Solariorbis parsnaticoide – type locality for species
    • †Solariorbis parsnaticoides – type locality for species
    • †Solariorbis proius
    • †Solariorbis velarum – type locality for species
  • †Solastella – type locality for genus
    • †Solastella cookei – type locality for species
  • Solemya
    • †Solemya bilix
  • Solen
    • †Solen pendletonensis
  • Solena
    • †Solena shirleyi – type locality for species
  • †Sophora
    • †Sophora wilcoxiana
  • Sorex
    • †Sorex cinereus
    • †Sorex cudahyensis
    • †Sorex lacustris
    • †Sorex megapalustris
    • A living Sorex palustris, or American water shrew
      †Sorex palustris
    • †Sorex pratensis
    • †Sorex taylori
    • †Sorex vagrans
  • Spermophilus
    • †Spermophilus elegans – or unidentified comparable form
    • †Spermophilus finlayensis
    • †Spermophilus howelli – or unidentified comparable form
    • †Spermophilus mcgheei
    • †Spermophilus spilosoma
    • A living Ictidomys tridecemlineatus (formerly Spermophilus tridecemlineatus), or thirteen-lined ground squirrel
      †Spermophilus tridecemlineatus
    • †Spermophilus variegatus
  • Sphaerium
    • †Sphaerium striatinum
  • †Sphyreana
  • Spilogale
    • †Spilogale microdens
    • †Spilogale putorius
    • †Spilogale rexroadi
  • †Spinizoncolpites
    • †Spinizoncolpites prominatus
  • Spirorbis
    • †Spirorbis leptostoma
  • Spirotropis
    • †Spirotropis claibornica – type locality for species
  • Spisula
    • †Spisula parilis
  • Sportella – tentative report
    • †Sportella divaricata
  • Stagnicola
    • †Stagnicola bulimoides
    • †Stagnicola exilis
    • †Stagnicola reflexa
  • Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon
    †Stegomastodon
    • †Stegomastodon mirificus
  • †Steneofiber
    • †Steneofiber barbouri – or unidentified comparable form
    • †Steneofiber fossor
    • †Steneofiber hesperus
  • †Stenomylus
  • †Stenotrema
    • †Stenotrema leai
    • †Stenotrema monodon
  • Sternotherus
  • Sthenictis
  • †Stintonia
    • †Stintonia brazosia
  • Mounted fossilized skeleton of the fossil pronghorn Stockoceros
    †Stockoceros – or unidentified comparable form
  • Storeria
  • †Strepsidura
    • †Strepsidura contorea
    • †Strepsidura ficus
    • †Strepsidura harrisi – type locality for species
  • Striarca
    • †Striarca stearnsii
    • †Striarca webbervillensis
  • †Striatolamia
    • †Striatolamia macrota
  • Strobilops
    • †Strobilops texasiana
  • †Stygimys
    • †Stygimys vastus – type locality for species
  • Life restoration of the Eocene taeniodont mammal Stylinodon
    †Stylinodon
  • Succinea
    • †Succinea avara
  • †Sulcocypraea
    • †Sulcocypraea kennedyi
  • Surculites
    • †Surculites cabezai
    • †Surculites lapillus – type locality for species
  • †Surculoma
    • †Surculoma dumblei
    • †Surculoma falsabenes
    • †Surculoma imbricata – type locality for species
    • †Surculoma kellogii
    • †Surculoma leoncola
    • †Surculoma penrosei
  • †Sycostoma
    • †Sycostoma texana – type locality for species
  • Sylvilagus
    • †Sylvilagus audubonii
    • †Sylvilagus floridanus
    • †Sylvilagus hibbardi
  • †Symmetrodontomys
    • †Symmetrodontomys beckensis
    • †Symmetrodontomys simplicidens
  • †Symplocos[3]
    • †Symplocos amoena – type locality for species[3]
    • †Symplocos fritschii – type locality for species[3]
    • †Symplocos martinettoi – type locality for species[3]
    • †Symplocos platycarpa – type locality for species[3]
    • †Symplocos rothwelii – type locality for species[3]
    • †Symplocos trinitiensis – type locality for species[3]
    • †Symplocos trisulcata – type locality for species[3]
  • Synaptomys
    • †Synaptomys australis – or unidentified comparable form
    • †Synaptomys cooperi
  • †Syncyclonema
  • Life restoration of the Miocene even-toed ungulate Synthetoceras
    †Synthetoceras
    • †Synthetoceras tricornatus – type locality for species
  • Syrphus – or unidentified comparable form
  • Syrrhophus
    • †Syrrhophus marnocki

T
  • Tantilla
  • Tanytarsus – tentative report
  • A living Tapirus, or tapir
    Tapirus
  • Taxidea
    • †Taxidea taxus
  • Teinostoma
    • †Teinostoma barryi – type locality for species
    • †Teinostoma eoa
    • †Teinostoma texanum
  • Restoration of the Miocene-Pliocene rhinoceros Teleoceras
    †Teleoceras
    • †Teleoceras fossiger
    • †Teleoceras guymonense
    • †Teleoceras hicksi
    • †Teleoceras major
    • †Teleoceras medicornutum
    • †Teleoceras meridianum
  • Shell of a Tellina, or tellin
    Tellina
    • †Tellina cherokeensis
    • †Tellina leana
    • †Tellina makelloides
    • †Tellina petropolitana
    • †Tellina quihi
    • †Tellina santander
    • †Tellina semipapyra – or unidentified comparable form
    • †Tellina semipapyria
    • †Tellina tallicheti
    • †Tellina trumani
  • Shell in multiple views of a Tenagodus sea snail
    Tenagodus
    • †Tenagodus texanus
  • †Tenuimactra – type locality for genus
    • †Tenuimactra hodgkinsoni – type locality for species
  • †Tephrocyon
    • †Tephrocyon scitulus
  • Terebellum
  • Terebra
    • †Terebra texagyra
  • †Terebrifusus
    • †Terebrifusus amoenus
    • †Terebrifusus multiplicatus
  • Teredo
    • †Teredo maverickensis
    • †Teredo ringens
  • Terminalia
    • †Terminalia hilgardiana
  • †Ternstroemites
    • †Ternstroemites preclaibornensis
  • Terrapene
  • Testudo
  • Restoration of the Pleictocene pronghorn Tetrameryx
    †Tetrameryx
    • †Tetrameryx knoxensis
    • †Tetrameryx shuleri
  • †Texasophis – type locality for genus
    • †Texasophis fossilis – type locality for species
  • †Texmelanatria
    • †Texmelanatria angeloi
    • †Texmelanatria texana
  • †Texoceros
    • †Texoceros altidens – type locality for species
  • †Texodon
    • †Texodon meridianus – type locality for species
  • †Texomys
    • †Texomys ritchiei – type locality for species
  • Thamnophis
  • Theodoxus
    • †Theodoxus domicilium – type locality for species
  • Mounted fossilized skeleton of the Miocene-Pliocene ground sloth Thinobadistes
    †Thinobadistes
    • †Thinobadistes wetzeli
  • †Thisbemys
    • †Thisbemys corrugatus
  • Thomomys
    • †Thomomys bottae
    • †Thomomys talpoides – or unidentified comparable form
  • †Tibiella – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Tibiella texana
  • †Tiburnus
    • †Tiburnus texanus
  • †Ticholeptus
    • †Ticholeptus rileyi – type locality for species
  • Life restoration of the Paleocene pantodont mammal Titanoides
    †Titanoides
    • †Titanoides gidleyi – or unidentified comparable form
  • †Tomarctus
    • †Tomarctus brevirostris
  • †Tornatellaea
    • †Tornatellaea leai
    • †Tornatellaea quercollis – tentative report
    • †Tornatellaea texana
  • †Tornatina – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Tornatina angelinae
  • †Toromeryx
    • †Toromeryx marginensis – type locality for species
  • †Toxotherium
    • †Toxotherium hunteri
  • †Transovula
    • †Transovula scobina – type locality for species
  • †Trichiuris
  • †Trigonias – tentative report
  • †Trigonictis
    • †Trigonictis cookii
  • Trigonostoma
    • †Trigonostoma babylonicum
    • †Trigonostoma elegantissima – type locality for species
    • †Trigonostoma gemmatum
    • †Trigonostoma harrisi
    • †Trigonostoma herbae – type locality for species
    • †Trigonostoma jonesae – type locality for species
    • †Trigonostoma panones
    • †Trigonostoma penrosei
    • †Trigonostoma sabinetownense
    • †Trigonostoma sabinetownensis – type locality for species
  • Trigonulina
    • †Trigonulina satex
  • †Trimalaxis – type locality for genus
    • †Trimalaxis ora – type locality for species
  • †Trinacria
    • †Trinacria microcancellata – type locality for species
  • †Tripia
    • †Tripia anteatripla – tentative report
  • †Triplopus – tentative report
    • †Triplopus implicatus – or unidentified comparable form
  • Trochita
    • †Trochita aperta
  • Trochocyathus
    • †Trochocyathus coloradoensis – type locality for species
    • †Trochocyathus uber – type locality for species
  • A living Tropidoclonion, or lined snake
    Tropidoclonion
    • †Tropidoclonion lineatum
  • †Tropisurcula
    • †Tropisurcula crenula – tentative report
    • †Tropisurcula grandis – type locality for species
    • †Tropisurcula milamensis – type locality for species
    • †Tropisurcula planus – type locality for species
  • †Truncilla
  • †Trygon
    • †Trygon alveolatus – type locality for species
  • †Trypanotoma
    • †Trypanotoma longispira
    • †Trypanotoma terebriformis
  • †Trypanotopsis
    • †Trypanotopsis texana
  • †Tuba
    • †Tuba antiquata
  • Tubiola
    • †Tubiola gracilis – type locality for species
  • Shell of a Tucetona bittersweet clam
    Tucetona
    • †Tucetona sabinensis
  • †Turbinolia
    • †Turbinolia pharetra
    • †Turbinolia subtercisa – type locality for species
    • †Turbinolia tenuis
  • Turboella
  • Turbonilla
    • †Turbonilla clinensis
    • †Turbonilla meta – type locality for species
    • †Turbonilla neglecta – type locality for species
    • †Turricula floweri
    • †Turricula nasuta
    • †Turricula plenta
  • Shell in multiple views of a Turris sea snail
    Turris
    • †Turris bimaniofus – or unidentified comparable form
    • †Turris capax
    • †Turris mediavia
    • †Turris nadoideus
    • †Turris nasuta – or unidentified comparable form
    • †Turris rockscreekensis
    • †Turris specus
  • Turritella
    • †Turritella – type locality for species informal
    • †Turritella bellifera
    • †Turritella biplicata – or unidentified comparable form
    • †Turritella chirena
    • †Turritella cortezi
    • †Turritella dutexata
    • †Turritella eurynome
    • †Turritella femina
    • †Turritella hilli
    • †Turritella houstonia
    • †Turritella humerosa
    • †Turritella kincaidensis
    • †Turritella nasuta
    • †Turritella nerinexa
    • †Turritella ola
    • †Turritella plummeri
    • †Turritella polysticha
    • †Turritella prehumerosa
    • †Turritella premortoni
    • †Turritella turneri
  • †Tylotrochus
  • A living Tympanuchus, or prairie chicken
    Tympanuchus
  • Typhina
    • †Typhina palmerae
  • †Typodus
    • †Typodus thyroidea
  • Tyto
    • †Tyto alba

U
  • Life restoration of the Eocene mammal Uintatherium
    †Uintatherium – or unidentified comparable form
    • †Uintatherium anceps
  • Umbraculum
    • †Umbraculum planulatum
    • †Umbraculum tomaculum – type locality for species
  • Unio
  • Urocyon
    • †Urocyon cinereoargenteus – or unidentified comparable form
    • †Urocyon galushai
  • Uromitra
    • †Uromitra brazosana
  • Ursus
    • †Ursus americanus
  • †Ustatochoerus
    • †Ustatochoerus leptoscelos
    • †Ustatochoerus major

V
  • A living Vallonia land snail
    Vallonia
  • †Varicobela
    • †Varicobela filum – type locality for species
  • Venericardia
    • †Venericardia bashiplata
    • †Venericardia densata – type locality for species
    • †Venericardia dua
    • †Venericardia eoa
    • †Venericardia horatiana
    • †Venericardia jewelli
    • †Venericardia mediaplata
    • †Venericardia planicosta
    • †Venericardia rotunda
    • †Venericardia smithi
    • †Venericardia smithii
    • †Venericardia stewarti
    • †Venericardia texalana
  • Verticordia
    • †Verticordia satex – or unidentified comparable form
  • Vertigo
  • †Vetericardiella
    • †Vetericardiella webbervillensis
  • Vibracellina
    • †Vibracellina capillaria
  • †Viejadjidaumo
    • †Viejadjidaumo magniscopuli – type locality for species
  • †Viridomys
  • †Vokesula
    • †Vokesula aldrichi
    • †Vokesula smithvillensis
  • †Volutostrombus – type locality for genus
    • †Volutostrombus eocenica – type locality for species
  • †Volvaria
    • †Volvaria gabbiana
    • †Volvaria reticulata
  • †Volvariella
    • †Volvariella milamensis – type locality for species
  • Volvulella
    • †Volvulella reklawensis – type locality for species
  • Vulpes
    • †Vulpes stenognathus
    • A living Vulpes velox, or swift fox
      †Vulpes velox
    • †Vulpes vulpes

X

Y
  • Yoldia
    • †Yoldia houstonia
    • †Yoldia kindlei
    • †Yoldia praecompsa
  • Yua[3]
    • †Yua texana – type locality for species[3]
  • †Yumaceras
    • †Yumaceras figginsi – or unidentified comparable form

Z
gollark: The somewhat imperfect state is better than wild unsafety all the time.
gollark: It can't know *all* safe things, see, and you don't know whether a non-provably-safe thing is safe.
gollark: No, that's an async runtime.
gollark: There are `SmallVec`s so I assume there exist `SmallString`s.
gollark: It is in fact just a `Vec<u8>` with invariants.

References
  1. Steven R. May (2019). "The Lapara Creek Fauna: Early Clarendonian of south Texas, USA". Palaeontologia Electronica. 22 (1): Article number 22.1.15. doi:10.26879/929.
  2. Steven R. May (2019). "The Lapara Creek Fauna: Early Clarendonian of south Texas, USA". Palaeontologia Electronica. 22 (1): Article number 22.1.15. doi:10.26879/929.
  3. Indah B. Huegele; Steven R. Manchester (2019). "Newly recognized diversity of fruits and seeds from the late Paleogene flora of Trinity County, East Texas, USA". International Journal of Plant Sciences. 180 (7): 681–708. doi:10.1086/704358.
  4. Steven R. May (2019). "The Lapara Creek Fauna: Early Clarendonian of south Texas, USA". Palaeontologia Electronica. 22 (1): Article number 22.1.15. doi:10.26879/929.
  5. Steven R. May (2019). "The Lapara Creek Fauna: Early Clarendonian of south Texas, USA". Palaeontologia Electronica. 22 (1): Article number 22.1.15. doi:10.26879/929.
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