List of the Cenozoic life of Virginia

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

A
  • †Abdounia
    • †Abdounia beaugei
    • †Abdounia minutissima
    • †Abdounia recticona
  • Abies
  • †Abra
    • †Abra aequalis
  • Acanthocybium
    • †Acanthocybium proosti
  • Accipiter
    • Living adult (center) and chick (lower right) Accipiter striatus, or sharp-shinned hawks
      †Accipiter striatus
  • †Achilleodinium
    • †Achilleodinium bioformoides
  • Acipenser
  • Acmaea
  • Acteocina
    • †Acteocina canaliculata
    • †Acteocina candei
  • Acteon
    • †Acteon novellus
  • †Actinocyclus
    • †Actinocyclus ellipticus
  • †Actinoptychus
    • †Actinoptychus marylandicus
    • †Actinoptychus virginicus
  • A living Actitis macularius, or spotted sandpiper
    Actitis – or unidentified comparable form
    • †Actitis macularia
  • †Adeorbis
  • Aegolius
    • †Aegolius acadicus
  • Aequipecten
    • †Aequipecten eboreus
  • Aetobatus
    • †Aetobatus arcuatus
    • †Aetobatus irregularis
  • Aetomylaeus
  • Agelaius
    • †Agelaius phoeniceus
  • Fossilized skull of the Miocene baleen whale Aglaocetus
    †Aglaocetus
    • †Aglaocetus patulus – type locality for species
  • †Aglyptorhynchus
    • †Aglyptorhynchus venablesi
  • Albula
    • †Albula eppsi
  • Alca
    • †Alca torda – or unidentified comparable form
  • Alces – or unidentified comparable form
    • †Alces alces
  • Aligena
    • †Aligena aequata
  • Fossilized skeleton of the Eocene pig-nosed turtle Allaeochelys
    †Allaeochelys
  • Alnus
  • †Alopecias
    • †Alopecias grandis – type locality for species
  • Alopias
  • Aluterus
  • †Ambystoma
  • Amia
  • Amiantis – tentative report
  • Ammonia
  • †Amonia
    • †Amonia limbatobeccarii
    • †Amonia limbatobeccarrii
    • †Amonia sobrina
    • †Amonia tepida
  • †Ampelopsis
  • Assemblage of fossilized skeletons of the softshell turtle Amyda
    Amyda – or unidentified comparable form
    • †Amyda pennata
  • Anachis
    • †Anachis avara
    • †Anachis camax – or unidentified comparable form
    • †Anachis harrisii
  • Anadara
  • †Anapteris
    • †Anapteris regalis
  • Anas
    • †Anas crecca
    • †Anas discors
    • †Anas platyrhynchos – or unidentified comparable form
  • Anguilla
    • †Anguilla bostoniensis – or unidentified comparable form
  • †Anguispira
  • Angulus
    • †Angulus agilis
    • †Angulus texanus
  • Anisodonta – tentative report
  • Anomia
  • †Anomotodon
    • †Anomotodon novus
  • A living Anoxypristis cuspidata, or knifetooth sawfish
    Anoxypristis
    • †Anoxypristis macrodens
  • †Anthus – or unidentified comparable form
    • †Anthus spinoletta
  • Aporrhais
    • †Aporrhais potomacensis
  • †Araloselachus
    • †Araloselachus cuspidata
  • Arbacia
    • †Arbacia improcera
  • †Archaeohippus
  • †Archaeomanta
    • †Archaeomanta melenhorsti
  • Architectonica
    • †Architectonica ianthinae
  • Restoration of an Arctodus, or short-faced bear, with a human to scale
    †Arctodus
    • †Arctodus simus
  • Argobuccinum
  • Argopecten
  • Arius – tentative report
  • Arossia
    • †Arossia glyptopoma
    • †Arossia newmani
  • †Ashleychelys
    • †Ashleychelys palmeri
  • Asio
    • A living Asio flammeus, or Short-eared owl
      †Asio flammeus – or unidentified comparable form
  • †Aspideretoides
    • †Aspideretoides virginianus – type locality for species
  • Astarte
    • †Astarte castanea
    • †Astarte cobhamensis
    • †Astarte coheni
    • †Astarte concentrica
    • †Astarte deltoidea
    • †Astarte exaltata
    • †Astarte obruta
    • †Astarte perplana
    • †Astarte rappahannockensis
    • †Astarte undulata
    • †Astarte vaginulata
  • Astrangia
    • †Astrangia danae
  • †Astroscopus
  • Astyris
  • Multiple views of a fossilized shell of the volute sea snail Athleta
    Athleta
    • †Athleta haleanus – or unidentified comparable form
    • †Athleta petrosa
    • †Athleta tuomeyi
  • †Atractodon
    • †Atractodon stonei

B
  • Balaena
    • †Balaena ricei – type locality for species
  • Balaenoptera
  • Fossilized vertebrae of the Pliocene baleen whale Balaenotus
    †Balaenotus
  • Balanophyllia
    • †Balanophyllia conradi – type locality for species
    • †Balanophyllia elaborata
  • Balanus
    • †Balanus improvisus
  • †Balbocerosoma
  • Barbatia
    • †Barbatia carolinensis – tentative report
  • Barnea
    • †Barnea costata
    • †Barnea truncata
  • Bartramia
    • †Bartramia longicauda
  • †Basilotritus
    • †Basilotritus wardii
  • Bathytormus
    • †Bathytormus alaeformis
  • †Beckettia – tentative report
  • Betula
  • Bicorbula
    • †Bicorbula idonea
  • Bison
    • †Bison bison
  • Bittiolum
  • Blarina
    • †Blarina brevicauda
  • Life restoration of the Pliocene toothed whale Bohaskaia
    †Bohaskaia – type locality for genus
    • †Bohaskaia monodontoides – type locality for species
  • †Bolcyrus – or unidentified comparable form
    • †Bolcyrus formosissimus
  • Bolivina
  • Bombycilla
    • †Bombycilla cedrorum
  • Bonasa
    • †Bonasa umbellus
    • †Bonasa umbrellus
  • †Bootherium
    • Fossilized skeleton of the Pleistocene-Holocene bovid Bootherium bombifrons, or Harlan's musk ox.
      †Bootherium bombifrons
  • Boreotrophon
    • †Boreotrophon tetricus
  • Bornia
    • †Bornia longipes
    • †Bornia triangulata
  • Bos
    • †Bos taurus
  • Bostrycapulus
  • Botaurus
    • †Botaurus lentiginosus
  • Brachidontes
    • †Brachidontes potomacensis
  • Brachiodontes
  • Branta
    • †Branta bernicla
  • †Brevoortia
  • †Brychaetus
    • †Brychaetus muelleri
  • Bubo
    • A living Bubo virginianus, or great horned owl
      †Bubo virginianus
  • Buccella
    • †Buccella depressa
  • †Buccinifusus
    • †Buccinifusus parilis
  • Buccinofusus
    • †Buccinofusus parilis
  • Buccinum
  • Bucephala
    • †Bucephala albeola
  • A living Anaxyrus fowleri (formerly Bufo fowleri), or Fowler's toad
    Bufo
    • †Bufo woodhousei
  • Buliminella
    • †Buliminella elegantissima – or unidentified comparable form
  • †Bulliopsis
    • †Bulliopsis quadrata
  • †Burnhamia
    • †Burnhamia daviesi
  • Busycon
    • †Busycon carica
    • †Busycon caricum
    • Shell in multiple views of a Busycon contrarium whelk
      †Busycon contrarium
    • †Busycon coronatum
    • †Busycon incile
    • †Busycon maximum
    • †Busycon maximus
  • Busycotypus
  • Buteo
    • A living Buteo jamaicensis, or red-tailed hawk
      †Buteo jamaicensis
    • †Buteo lineatus
    • †Buteo platypterus

C
  • †Cacharias
  • Cadulus
    • †Cadulus thallus
  • Caecum
  • Caestocorbula
    • †Caestocorbula fossata
  • †Calasoma
  • †Calippus
    • †Calippus regulus – or unidentified comparable form
  • A living Calliostoma top sea snail
    Calliostoma
  • †Callippus
    • †Callippus regulus – or unidentified comparable form
  • Callista
    • †Callista perovata
  • Callocardia
    • †Callocardia catharia
  • Calonectris
    • †Calonectris kurodai – type locality for species
  • †Calophos
    • †Calophos plicatile
  • †Calorhadia
    • †Calorhadia bella
    • †Calorhadia opulenta
    • †Calorhadia semen
  • †Calyptraphorus
    • †Calyptraphorus trinodiferus
    • †Calyptraphorus velatus
  • Cambarus
    Cambarus
    • †Cambarus bartonii – or unidentified comparable form
    • †Cambarus longulus – or unidentified comparable form
  • †Campanuyla
  • Canachites
    • †Canachites canadensis
  • †Canarium
    • †Canarium parksii
  • Cancellaria
  • Cancer
  • 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 latrans
    • †Canis lupus – or unidentified comparable form
  • Cantharus
    • †Cantharus marylandicus
  • Canthon
  • Capella
    • †Capella gallinago
  • Carcharhinus
  • Carcharias
    • †Carcharias hopei
    • †Carcharias teretidens
  • Carcharodon
    • Fossilized tooth of the Miocene-Pliocene shark Cosmopolitodus hastalis, or broad-toothed mako
      †Carcharodon hastalis
  • Carditamera
    • †Carditamera arata
  • †Caricella
  • †Carinorbis
    • †Carinorbis dalli
  • †Carolinapecten
    • †Carolinapecten eboreus
    • †Carolinapecten urbannaensis
  • †Carolinochelys
    • †Carolinochelys wilsoni
  • Carphophis
  • Carya
  • Caryocorbula
    • †Caryocorbula caribaea
    • †Caryocorbula conradi
    • †Caryocorbula contracta
    • †Caryocorbula deusseni
  • Castor
    • †Castor canadensis
  • Mounted fossilized skeleton of the Pliocene-Pleistocene giant beaver Castoroides
    †Castoroides
    • †Castoroides ohioensis
  • Catharus
  • †Catinella
  • Catoptrophorus
    • †Catoptrophorus semipalmatus
  • †Catostomus
  • Celtis
  • Cerithiopsis
  • Certhia
    • †Certhia familiaris
  • †Cervalces – tentative report
  • Cervus
    • †Cervus elaphus
  • Cetorhinus
  • Life restoration of the Miocene-Pliocene whale Cetotherium
    †Cetotherium
    • †Cetotherium crassangulum – type locality for species
  • Chaetura
    • †Chaetura pelagica
  • Chama
  • †Charadrisu
    • †Charadrisu vociferus
  • Charadrius
    • †Charadrius vociferus
  • Chelydra
    • A living Chelydra serpentina, or common snapping turtle
      †Chelydra serpentina
  • †Chesacardium
    • †Chesacardium acutilaqueatum
    • †Chesacardium laqueatum
  • †Chesaconcavus
    • †Chesaconcavus myosulcatus
    • †Chesaconcavus proteus
    • †Chesaconcavus rossi
    • †Chesaconcavus santamaria
  • †Chesapactern
    • †Chesapactern madisonius
  • †Chesapecten
    • †Chesapecten clintonius
    • †Chesapecten coccymelus
    • †Chesapecten edgecombensis
    • Shells of the Pliocene scallop Chesapecten jeffersonius
      †Chesapecten jeffersonius
    • †Chesapecten madisonianis
    • †Chesapecten madisonius
    • †Chesapecten middlesexensis
    • †Chesapecten nefrens
    • †Chesapecten santamaria
  • Chione
  • Chlamys
    • †Chlamys brookvillensis
    • †Chlamys choctavensis
    • †Chlamys decemaria
    • †Chlamys johnsoni
    • †Chlamys santamaria
    • †Chlamys seabeensis
    • †Chlamys vaunwythei – or unidentified comparable form
    • †Chlamys wahtubbeana
  • †Chordeiles
    • A living Chordeiles minor, or common nighthawk
      †Chordeiles minor
  • Cibicides
    • †Cibicides lobatulus
  • Cingula
    • †Cingula norfolkensis
  • Circulus
    • †Circulus liratus
  • Cirsotrema
  • Cistothorus
    • †Cistothorus platensis – or unidentified comparable form
  • Clavus – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Clavus eburnea
  • †Cleistosphaeridium
    • †Cleistosphaeridium placacanthum
  • Clethrionomys
    • †Clethrionomys gapperi
  • Clidiophora
    • †Clidiophora crassidens
  • A living Cliona sponge
    Cliona
  • Coccyzus
  • †Cochliolepsis
  • Colaptes
    • †Colaptes auratus
  • Colinus
    • †Colinus virginianus
  • Coluber
    • †Coluber constrictor
  • †Columella
    • †Columella simplex
  • Shells in differing orientations of Colus whelk sea snails
    Colus
  • Condylura
    • †Condylura cristata
    • †Condylura crystata
  • †Conradostrea
    • †Conradostrea sculpturata
  • Contopus
    • †Contopus virens
  • †Contropus
    • †Contropus virens
  • Conus
    • †Conus adversarius
    • †Conus deluvianus
    • †Conus diluvianus
    • †Conus marylandicus
  • Shell of a Corbula basket clam
    Corbula
    • †Corbula extenuata
    • †Corbula inaequalis
    • †Corbula subengota
    • †Corbula texana
  • †Coronia
  • †Corrundinium
  • Corvus
    • †Corvus brachyrhynchos
  • †Corynorynchus
  • †Costaglycymeris
    • †Costaglycymeris mixoni
    • †Costaglycymeris subovata
    • †Costaglycymeris virginiae
  • Cotonopsis
  • †Coturnipes – or unidentified comparable form
    • †Coturnipes cooperi
  • †Coupatezia
    • †Coupatezia woatersi
  • Crassatella
    • †Crassatella aquiana – type locality for species
  • Crassinella
  • Crassostrea
    • †Crassostrea virginica
  • Crepidula
  • Fossil of the Early Cretaceous-Eocene shark Cretolamna
    †Cretolamna
    • †Cretolamna appendiculata
  • Cribrilina
    • †Cribrilina punctata
  • †Cribroperidinium
  • Crocodylus
    • †Crocodylus antiquus – type locality for species
  • Crotalus
    • †Crotalus adamanteus – or unidentified comparable form
    • †Crotalus horridus
  • Crucibulum
  • Cryptobranchus
    • A living Cryptobranchus alleganiensis, or hellbender salamander
      †Cryptobranchus alleganiensis
  • †Cryptogramma
    • †Cryptogramma acrosticoides
  • Cryptosula
  • Cryptotis
    • †Cryptotis parva
  • Ctena
    • †Ctena speciosa
  • †Cubitostrea
    • †Cubitostrea divaricata
    • †Cubitostrea sellaeformis
  • Shell of a Cucullaea, or false ark shell
    Cucullaea
  • Cumingia
    • †Cumingia tellinoides
  • †Cuneocorbula
    • †Cuneocorbula subengonata
  • Cupuladria
    • †Cupuladria biporosa
    • †Cupuladria owenii
  • Cyanocitta
    • †Cyanocitta cristata
  • Cyclocardia
  • Fossilized skeleton of the Eocene bony fish Cyclopoma
    †Cyclopoma
    • †Cyclopoma folmeri – type locality for species
  • Cyclostremiscus
    • †Cyclostremiscus obliquestriatus
  • Cylichna
    • †Cylichna cylindricus
    • †Cylichna cylindrus
    • †Cylichna venusta
  • †Cylindracanthus
    • †Cylindracanthus rectus
  • †Cymatogonia
    • †Cymatogonia amblyoceros
  • Cymatosyrinx
    • †Cymatosyrinx lunata
  • Fossilized cranium of the Miocene bear-dog Cynelos
    †Cynelos
    • †Cynelos idoneus – or unidentified comparable form
  • Cynoscion
  • Cyrtopleura

D
  • †Dallarca
    • †Dallarca carolinensis
    • †Dallarca elevata
    • †Dallarca idonea
    • †Dallarca virginiae
  • Dasyatis
  • Dasypus
    • Fossilized mandible in multiple views of the Pleistocene Dasypus bellus, or beautiful armadillo
      †Dasypus bellus – or unidentified comparable form
  • †Deflandrea
    • †Deflandrea phosphoritica
  • †Delphineis
    • †Delphineis angustata
    • †Delphineis biseriata
    • †Delphineis novaecaesaraea
    • †Delphineis penelliptica
  • †Delphinodon
    • †Delphinodon dividum
  • Dendrocopos
    • †Dendrocopos pubescens
    • †Dendrocopos villosus
  • †Dendrogapus – or unidentified comparable form
    • †Dendrogapus canadensis
  • †Dendroica – or unidentified comparable form
    • A living Setophaga coronata, or yellow-rumped warbler
      †Dendroica coronata
  • Dentalium
    • †Dentalium alternatum
    • †Dentalium attenuatum
    • †Dentalium carolinense
    • †Dentalium carolinensis
  • †Denticulopsis
    • †Denticulopsis hustedtii
  • Dentimargo
  • Desmognathus
  • Diadophis
  • Dicaelus
  • †Diemichtylus
    • †Diemichtylus viridescens
  • Dinocardium
    • †Dinocardium robustum
  • Diodora
    • †Diodora auroraensis – or unidentified comparable form
    • †Diodora redimicula
  • †Diorocetus
    • †Diorocetus hiatus
  • Mounted fossilized skeleton of the Paleocene-Miocene crocodilian Diplocynodon
    †Diplocynodon
    • †Diplocynodon hantoniensis
  • Diplodonta
    • †Diplodonta acclinis
    • †Diplodonta hopkinsensis
    • †Diplodonta leana
    • †Diplodonta punctata
    • †Diplodonta ungulina
  • Discinisca
    • †Discinisca lugubris
  • †Discoaster
  • Discoporella
    • †Discoporella umbellata
  • Discus
  • Divalinga
    • †Divalinga quadrisulcata
  • †Dolicholatirus
  • †Dolichonyx – or unidentified comparable form
    • †Dolichonyx oryzivorus
  • †Dollochelys – tentative report
  • Donax
  • Dosinia
  • †Dosiniopsis
    • †Dosiniopsis lenticularis
  • Dryocopus
    • A living Dryocopus pileatus, or pileated woodpecker
      †Dryocopus pileatus

E
  • †Eburneopecten
    • †Eburneopecten dalli
    • †Eburneopecten scintillatus – or unidentified comparable form
  • Echinocardium
    • †Echinocardium orthonotum
  • Echinorhinus
    • †Echinorhinus priscus
  • †Ecphora
  • †Ectopistes
    • Taxidermied male Ectopistes migratorius, or passenger pigeon
      †Ectopistes migratorius
  • †Egertonia
    • †Egertonia isodonta
  • Elaphe
    • †Elaphe guttata – or unidentified comparable form
    • †Elaphe obsoleta – or unidentified comparable form
  • Electra
    • †Electra monostachys
  • Elphidium
    • †Elphidium articulatum
    • †Elphidium brooklynense
    • †Elphidium clavatum
    • †Elphidium discoidale
    • †Elphidium excavatum
    • †Elphidium galvestonense
    • †Elphidium gunteri
    • †Elphidium incertum
    • †Elphidium latispatium
    • †Elphidium subarticum
    • †Elphidium tumidum
  • †Elytrocysta
  • †Empidonax
  • Ensis
    • †Ensis directus
    • †Ensis ensiformis
  • Life restoration of two of the Miocene baleen whale Eobalaenoptera pursued by the giant shark Carcharocles megalodon
    †Eobalaenoptera – type locality for genus
    • †Eobalaenoptera harrisoni – type locality for species
  • Eontia
    • †Eontia ponderosa
  • †Eopleurotoma – or unidentified comparable form
    • †Eopleurotoma harrisi
    • †Eopleurotoma potomacensis
  • †Eosphargis
    • †Eosphargis gigas
    • †Eosphargis insularis
  • †Eosuchus
    • †Eosuchus lerichei
    • †Eosuchus minor
  • Epitonium
    • †Epitonium angulatum
    • †Epitonium championi
    • †Epitonium humphreysii
    • †Epitonium multistriatum
    • †Epitonium potomacense
    • †Epitonium rupicola
    • †Epitonium virginianum
  • Eptesicus
    • †Eptesicus fuscus
  • Equus
  • Eremophila
    • †Eremophila alpestris
  • Erethizon
    • †Erethizon dorsatum
  • Erolia
    • †Erolia minutilla
  • †Erycinella
    • †Erycinella ovalis
  • Eschrichtius
    • †Eschrichtius leptocentrus – type locality for species
    • A living Eschrichtius robustus, or gray whale
      †Eschrichtius robustus
  • Esox
    • †Esox americanus – or unidentified comparable form
  • †Esthonyx – or unidentified comparable form
  • Eucrassatella
  • Eulima
    • †Eulima dalli
    • †Eulima rectiuscula
  • †Euloxa
    • †Euloxa latisulcata
  • Eumeces
    • †Eumeces laticeps – or unidentified comparable form
  • Eupleura
  • Life restoration of the Miocene whale Eurhinodelphis (above)
    †Eurhinodelphis
    • †Eurhinodelphis longirostris
  • Euspira
  • Eutamias
    • †Eutamias minimus
  • Euvola

F
  • Falco
    • A living Falco sparverius, or American kestrel
      †Falco sparverius
  • Felis
    • †Felis domesticus
  • Ficus
    • †Ficus affinis
  • †Fisherichthys – type locality for genus
    • †Fisherichthys folmeri – type locality for species
  • Flabellum
  • Fossarus
    • †Fossarus lura
    • †Fossarus lyra
  • Fusinus
    • †Fusinus exilis

G

H
  • †Hadrodelphis – or unidentified comparable form
    • †Hadrodelphis calvertense
  • †Haldea
  • †Halicetus – tentative report
    • †Halicetus ignotus
  • Halichoerus
    • A living Halichoerus grypus, or grey seal
      †Halichoerus grypus
  • Hanzawaia
    • †Hanzawaia concentrica
  • Hastula
    • †Hastula simplex
  • Haynesina
    • †Haynesina germanica
  • Helicodiscus
  • Hemimactra
    • †Hemimactra confraga
    • †Hemimactra solidissima
  • A living Hemipristis weasel shark
    Hemipristis
  • Hendersonia
    • †Hendersonia occulia
    • †Hendersonia occulta
  • †Heteraulacacysta
  • Heterodontus
    • †Heterodontus lerichei
  • †Heterotorpedo
    • †Heterotorpedo fowleri
  • Hexanchus
  • Hiatella
  • Hipponix
    • †Hipponix pygmaeus
  • Hippoporidra
    • †Hippoporidra calcarea
  • Hippoporina
    • †Hippoporina porosa
  • Fossilized skull of the Eocene tapir-like mammal Homogalax
    †Homogalax – or unidentified related form
  • Hydrobia
    • †Hydrobia truncata
  • Hydroides
    • †Hydroides dianthus
    • †Hydroides diantthus
  • Hyla
    • †Hyla crucifer – or unidentified comparable form
  • Hylocichla
  • †Hyopsodus – or unidentified comparable form
  • †Hypolophodon
    • †Hypolophodon sylvestris
  • †Hyposaurus – or unidentified comparable form
  • †Hystrichokolpoma

I
  • †Icterus – or unidentified comparable form
    • A living Icterus spurius, or orchard oriole
      †Icterus spurius
  • Ilyanassa
    • †Ilyanassa arata
    • †Ilyanassa granifera
    • †Ilyanassa obsoleta
    • †Ilyanassa procina
    • †Ilyanassa trivittata
  • †Iodes
    • †Iodes multireticulata
  • Ischadium
    • †Ischadium recurvum
  • Isistius
    • †Isistius trituratus
  • †Isognomen
  • †Isognommen
  • Isognomon
    • †Isognomon maxilliata
    • †Isognomon maxilliatus
  • A living Istiophorus , or sailfish
    Istiophorus
  • Isurus

J
  • †Jacquhermania
    • †Jacquhermania duponti
  • Junco
    • A living Junco hyemalis, or dark-eyed junco
      †Junco hyemalis

K

L
  • †Laevihastula
    • †Laevihastula simplex
  • Lagena
  • Living Lagopus muta, or rock ptarmigan
    †Lagopus
    • †Lagopus mutus – or unidentified comparable form
  • Lamna
    • †Lamna obliqua
  • Lampropeltis
    • †Lampropeltis doliata
  • Larus
    • †Larus hyperboreus
  • Lasiurus
    • †Lasiurus borealis
  • Latirus
    • †Latirus marylandicus
  • Lepisosteus
  • †Leptomactra
    • †Leptomactra delumbis
  • †Leptophoca
    • †Leptophoca lenis
    • †Leptophoca proxima – or unidentified comparable form
  • †Leptoxis
  • Lepus
    • A living Lepus americanus, or snowshoe hare
      †Lepus americanus
  • †Levifusus
    • †Levifusus trabeatus
  • Libinia
  • †Limosa – or unidentified comparable form
  • Linga
    • †Linga amiantus
  • †Lingulodinium
    • †Lingulodinium machaerophorum
  • †Lirodiscus
    • †Lirodiscus virginianus
  • †Lirofusus – or unidentified comparable form
  • Lirophora
  • †Lirosoma
    • †Lirosoma sulcata
    • †Lirosoma sulcosa
  • Litiopa
    • †Litiopa marylandica
  • Littoraria
  • Lontra
    • Pair of living Lontra canadensis, or North American river otter
      †Lontra canadensis
  • Lophius
    • †Lophius sagittidens
  • †Lophocysta – tentative report
  • Lophodytes
    • †Lophodytes cucullatus
  • Lopholatilus
  • Loxia
  • Lucina
    • †Lucina aquiana – type locality for species
    • †Lucina divaricata
    • †Lucina pomilia
    • †Lucina squamata
  • Lucinisca
    • †Lucinisca cribarius
  • Lucinoma
    • †Lucinoma contracta
  • Lunatia
    • †Lunatia interna
  • †Lutianus
  • Lydiphnis
    • †Lydiphnis novicastri
  • Lymnaea
    • †Lymnaea catascopium
  • Lynx
    • A living Lynx rufus, or bobcat
      †Lynx rufus – or unidentified comparable form
  • Lyonsia
    • †Lyonsia hyalina

M
  • Macoma
  • Macrocallista
    • †Macrocallista reposta
    • †Macrocallista subimpressa
  • Mactrodesma
    • †Mactrodesma subponderosa
  • †Mactropsis
    • †Mactropsis olssoni
  • Makaira
    • †Makaira nigricans – or unidentified comparable form
  • †Mammut
    • †Mammut americaneum
    • †Mammut americanum
  • †Mammuthus
    • †Mammuthus columbi
    • Life restorations of a Mammut americanum, or American mastodon (right), and a Mammuthus primigenius, or wooly mammoth (left)
      †Mammuthus primigenius
  • Marevalvata
    • †Marevalvata tricarinata
  • †Margaritaria
    • †Margaritaria abrupta
  • Marginella
    • †Marginella bella
    • †Marginella denticulata
  • †Mariacolpus
    • †Mariacolpus plebeia
  • †Mariafusus
    • †Mariafusus marylandica
  • Marmota
    • A living Marmota monax, or groundhog
      †Marmota monax
  • †Marvacrassatella
    • †Marvacrassatella cyclopterus
    • †Marvacrassatella marylandica
    • †Marvacrassatella surryensis
    • †Marvacrassatella turgidula
    • †Marvacrassatella undulata
    • †Marvacrassatella undulatus
    • †Marvacrassatella urbannaensis
    • †Marvacrassatella urbannensis
  • Massilina
  • Masticophis
  • †Mclelannia
    • †Mclelannia aenigma
  • Megaceryle
    • †Megaceryle alcyon
  • Mounted fossilized skeleton of the Miocene-Pleistocene ground sloth Megalonyx
    †Megalonyx
    • †Megalonyx jeffersonii
  • Megalops
  • Megaptera
    • †Megaptera expansa
  • Melanerpes
    • †Melanerpes carolinus
    • †Melanerpes erythrocephalus
  • Meleagris
    • †Meleagris gallopavo
  • Mellita
    • †Mellita aclinensis
    • †Mellita aclinus
  • Melospiza
    • †Melospiza melodia
  • Membranipora
    • †Membranipora tenuis
  • Membraniporella
    • †Membraniporella petasus – or unidentified comparable form
  • Mephitis
    • †Mephitis mephitis
  • Mercenaria
    • †Mercenaria campechiensis
    • †Mercenaria capax
    • †Mercenaria corrugata
    • †Mercenaria cuneata
    • †Mercenaria druidi
    • †Mercenaria inflata
    • Collection of Mercenaria mercenaria, also known as hard clams or quahogs
      †Mercenaria mercenaria
    • †Mercenaria tetrica
  • Mergus
  • †Meridiania
    • †Meridiania conyexa
  • †Merychippus
  • †Mesocetus
    • †Mesocetus pusillus
    • †Mesocetus siphunculus – type locality for species
  • Mesoplodon
    • †Mesoplodon longirostris – or unidentified comparable form
  • †Mesorhytis – tentative report
    • †Mesorhytis pomonkensis
  • Mounted fossilized skeleton of the Miocene-Pleistocene manatee relative Metaxytherium
    †Metaxytherium
    • †Metaxytherium crataegense
    • †Metaxytherium cratagense
  • †Metopocetus – type locality for genus
    • †Metopocetus durinasus – type locality for species
  • Microporella
    • †Microporella ciliata
  • Microtus
    • †Microtus chrotorrhinus
    • †Microtus ochrogaster
    • †Microtus pennsylvanicus
    • A living Microtus pinetorum, or woodland vole
      †Microtus pinetorum
    • †Microtus xanthognathus
    • †Microtus zanthognathus
  • Mictomys
    • †Mictomys borealis
  • Miltha
    • †Miltha aquiana
  • †Miocepphus
    • †Miocepphus blowi – type locality for species
    • †Miocepphus bohaskai
    • †Miocepphus mcclungi
  • Mitrella
    • †Mitrella communius
  • Modiolus
    • †Modiolus ducateli
    • †Modiolus squamosus
  • Mola
  • Molothrus
    • A living Molothrus ater, or brown-headed cowbird
      †Molothrus ater
  • †Monotherium
    • †Monotherium wymani
  • Morus
    • †Morus bassanus
  • †Moxostoma
  • Mulinia
  • †Multiporina
    • †Multiporina cornuta
  • Musculus
  • Mustela
    • †Mustela americana
    • †Mustela erminea
    • †Mustela frenata
    • †Mustela nivalis
    • †Mustela vison
  • †Mya
    • †Mya arenaria
    • †Mya wilsoni – tentative report
  • Myliobatis
    • †Myliobatis dixoni
    • †Myliobatis latidens
    • †Myliobatis striatus
  • Fossilized skeleton of the Pliocene-Holocene peccary Mylohyus
    †Mylohyus
    • †Mylohyus fossilis
  • Myochama
  • Myotis
    • †Myotis grisescens
    • †Myotis keenii
    • †Myotis lucifugus
  • Myriophyllum
  • Myrtea – tentative report
    • †Myrtea curta – or unidentified comparable form
    • †Myrtea uhleri
  • Mytilus
    • †Mytilus edulis

N
  • †Nannaria
  • †Nanogyra
    • †Nanogyra virgula
  • Napaeozapus
    • †Napaeozapus insignis
  • †Napeozapus
    • †Napeozapus insignis
  • A living Nassarius, or nassa mud snail
    Nassarius
    • †Nassarius marylandica
    • †Nassarius peralta
  • Naticarius
  • Natrix
  • Nebrius
    • †Nebrius thielensis
  • Negaprion
  • Nemocardium
  • Neofiber
    • †Neofiber leonardi
  • †Neopanope
    • †Neopanope texana
  • Neotoma
    • Close-up of a Neotoma floridana, or eastern woodrat
      †Neotoma floridana
  • Nerodia
    • †Nerodia sipedon
  • Neverita
    • †Neverita duplicatus
  • †Ninoziphius
    • †Ninoziphius platyrostris – or unidentified comparable form
  • †Nipa – or unidentified comparable form
    • †Nipa burtini
  • Niso
  • †Nocomis
    • A living Nocomis raneyi, or bull chub
      †Nocomis raneyi – or unidentified comparable form
  • Noetia
    • †Noetia incile
  • Nonion
  • Nonionella
    • †Nonionella atlantica
  • Notidanus
    • †Notidanus primigenius
  • Notophthalmus
    • †Notophthalmus viridescens – or unidentified comparable form
  • Notorhynchus
  • Close-up portrait of a living Notorynchus cepedianus, or broadnose sevengill shark
    Notorynchus
    • †Notorynchus cepidianus
  • †Noturus
  • Nucula
  • Nuculana
    • †Nuculana acuta
    • †Nuculana cliftonensis
    • †Nuculana coelatella
    • †Nuculana cultelliformis
    • †Nuculana improcera
  • †Nyssa
    • †Nyssa sylavtica

O
  • Ochotona
  • Ocypode
  • Odobenus
    • †Odobenus rosmarus
  • Odocoileus
    • †Odocoileus virginianus
  • Odontaspis
    • †Odontaspis macrota
    • †Odontaspis winkleri
  • Illustration of a fossilized partial skull of the Paleocene-Eocene pseudo-toothed bird Odontopteryx
    †Odontopteryx – tentative report
  • Odostomia
  • Oliva
    • †Oliva canaliculata
    • †Oliva carolinae
    • †Oliva sayana
  • Olivella
  • Ondatra
    • †Ondatra zibethicus
  • Onthophagus
    • †Onthophagus janus – or unidentified comparable form
  • †Ontocetus – type locality for genus
    • †Ontocetus emmonsi – type locality for species
  • †Operculodinium
  • Opheodrys
  • †Opsanus
  • Orthoyoldia
    • †Orthoyoldia psammotaea
  • Life restoration of the Miocene sperm whale Orycterocetus
    †Orycterocetus
    • †Orycterocetus crocodilinus – type locality for species
  • †Osteopygis
    • †Osteopygis roundsi – type locality for species
  • †Ostracion
    • †Ostracion meretrix
  • Ostrea
  • †Otodus
    • Diagram illustrating the largest (grey) and most conservative (red) size estimates of the Miocene-Pliocene shark Carcharocles megalodon (sometimes Carcharodon or Otodus megalodon) with a whale shark (violet), great white shark (green), and anachronistic human (black) to scale
      †Otodus megalodon
  • Otus
    • †Otus asio
  • †Oxyrhina
    • †Oxyrhina retroflexa
  • †Oxyura
    • †Oxyura jamaicensis

P
  • †Pachecoa
    • †Pachecoa decisa – or unidentified comparable form
    • †Pachecoa ellipsis
  • †Pachygaleus
    • †Pachygaleus lefevrei
  • †Palaeocystodinium
    • †Palaeocystodinium golzowense
  • †Palaeogaleus
    • †Palaeogaleus vincenti
  • †Palaeohypotodus
    • †Palaeohypotodus ratoti
  • Restoration of the Cretaceous-Eocene sea snake Palaeophis
    †Palaeophis
    • †Palaeophis casei
    • †Palaeophis grandis
    • †Palaeophis toliapicus
    • †Palaeophis virginianus – type locality for species
  • †Palaeorhincodon
    • †Palaeorhincodon wardi
  • †Palaeosinopa – or unidentified comparable form
  • Pandora
    • †Pandora arenosa
    • †Pandora gouldiana
    • †Pandora trilineata
  • Panopea
    • †Panopea elongata
    • †Panopea goldfussi
    • †Panopea goldfussii
    • †Panopea reflexa
  • Panopeus
  • Panthera
    • A living Panthera leo, or lion
      †Panthera leo
  • Paraconcavus
    • †Paraconcavus neusensis
    • †Paraconcavus prebrevicalcar
  • †Paralbula
    • †Paralbula marylandica
  • †Paramya
    • †Paramya subovata
  • Parascalops
    • †Parascalops breweri
  • Life restoration of the Miocene baleen whale Parietobalaena and calf
    †Parietobalaena
    • †Parietobalaena palmeri
  • †Parophisaurus
    • †Parophisaurus mccloskeyi – type locality for species
  • Parus
    • †Parus bicolor
  • Parvanachis
  • Parvilucina
    • †Parvilucina crenulata
    • †Parvilucina multilineatus
    • †Parvilucina multistriata
  • Passerella
    • A living Passerella iliaca, or fox sparrow
      †Passerella iliaca
  • Pecten
    • †Pecten humphreysii
    • †Pecten marylandica
    • †Pecten perplanus
    • †Pecten seabeensis
  • †Pedalion
    • †Pedalion maxillatum
  • Pedioecetes
    • †Pedioecetes phasianellus
  • Pekania
    • †Pekania pennanti – or unidentified comparable form
  • Life restoration of the Oligocene-Pleistocene false-toothed bird Pelagornis
    †Pelagornis
  • †Pelocetus
    • †Pelocetus calvertensis
  • †Pentadinium
    • †Pentadinium goniferum
    • †Pentadinium laticinctum
  • †Peradectes
    • †Peradectes guottai – type locality for species
  • †Perimyotis
    • †Perimyotis subflavus
  • Periploma
    • †Periploma leanum
  • Perisoreus
    • A living Perisoreus canadensis, or grey jay
      †Perisoreus canadensis
  • †Perisorus
    • †Perisorus canadensis
  • Peristernia
    • †Peristernia filicata
  • Peromyscus
  • Petaloconchus
    • †Petaloconchus graniferus
    • †Petaloconchus virginica
  • †Petriathyris
  • Petricola
    • †Petricola pholadiformis
  • Petrochelidon
    • †Petrochelidon pyrrhonota
  • †Petrocheliodon
    • †Petrocheliodon pyrrhonota
  • †Phalacrocoras
    • †Phalacrocoras auritus
  • Phalacrocorax
    • A living Phalacrocorax auritus, or double-crested cormorant
      †Phalacrocorax auritus
  • †Phenacomya
    • †Phenacomya petrosa
  • Phenacomys
    • †Phenacomys intermedius
    • †Phenacomys ungava – or unidentified comparable form
  • †Phocageneus – type locality for genus
    • †Phocageneus venustus – type locality for species
  • Pholadomya
    • †Pholadomya marylandica
  • Pholas
    • †Pholas petrosa – tentative report
  • Phyllodus
    • †Phyllodus toliapicus
  • Physa
    • †Physa heterostropha
  • †Physogaleus
    • †Physogaleus contortus
    • †Physogaleus secundas
  • †Phytolacca
    • †Phytolacca decandra
  • Pica
    • †Pica pica
  • Picea
  • †Pinguinus
    • Taxidermied specimen of Pinguinus impennis, or the great auk
      †Pinguinus impennis
  • Pinicola – or unidentified comparable form
    • †Pinicola enucleator
  • †Pinquinus
    • †Pinquinus impennis
  • Pinus
  • †Pipestrellus
    • †Pipestrellus subflavus
  • Pipistrellus
    • †Pipistrellus subflavus
  • Piranga
  • Pisania
    • †Pisania nux
  • Pisidium
    • †Pisidium dubium
  • †Pisodus
    • †Pisodus oweni
  • Pitar
  • Placopecten
    • †Placopecten clintonius
    • †Placopecten princepoides
  • †Plagiarca
    • †Plagiarca rhomboidella
  • Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922).
    †Platygonus
  • Plecotus
    • †Plecotus townsendii – or unidentified comparable form
  • †Pleiorytis
    • †Pleiorytis centenaria
  • Pleuromeris
  • Plicatula
  • Pluvialis
    • †Pluvialis dominica
  • Podiceps
    • A living Podiceps auritus, or horned grebe
      †Podiceps auritus
  • Podilymbus
    • †Podilymbus podiceps
  • Pogonias
    • †Pogonias multidentatus – type locality for species
  • Polinices
    • †Polinices aratus
  • Polydora
  • Polygonum
  • †Pomatiopsis
  • †Pooecetes
    • †Pooecetes gramineus
  • Poroeponides
    • †Poroeponides lateralis
    • †Poroeponides repanda – or unidentified comparable form
  • Porzana
    • †Porzana carolina
  • †Potamogeton
  • †Premontria
    • †Premontria degremonti
  • †Prionodon
    • †Prionodon egertoni
  • Prionotus
  • †Priscoficus
    • †Priscoficus arguta
  • Pristis
    • †Pristis brachyodon – type locality for species
    • †Pristis luthami
  • †Procamelus – or unidentified comparable form
  • †Procolpochelys
    • †Procolpochelys charlestonensis
    • †Procolpochelys grandaeva
  • Procyon
    • †Procyon lotor
  • †Prolates
    • †Prolates dormaalensis
  • †Pronum
    • †Pronum roscidum
  • †Propristis
    • †Propristis schweinfurthi
  • †Prosthennops – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Prosthennops xiphidonticus
  • †Protautoga
    • †Protautoga conidens
  • †Protelphidium
    • †Protelphidium tisburyense
  • Prunum
  • Psammechinus
    • †Psammechinus philanthopus
    • †Psammechinus philanthropus
  • Hypothetical restoration of the Oligocene-Pliocene sea turtle Psephophorus
    †Psephophorus
  • Pseudochama
    • †Pseudochama corticosa
    • †Pseudochama corticosta
  • Pseudoliva
    • †Pseudoliva santander
    • †Pseudoliva vetusta
  • Pseudopolymorphina
    • †Pseudopolymorphina novangliae – or unidentified comparable form
  • Pseudotorinia
    • †Pseudotorinia nupera
    • †Pseudotorinia nuperum
  • Pteria
  • Pteromeris
    • †Pteromeris tridentata
  • Pteromylaeus
  • †Ptychosalpinx
    • †Ptychosalpinx fossulata
    • †Ptychosalpinx laqueata
    • †Ptychosalpinx multirugata
    • †Ptychosalpinx tuomeyi
  • Pulvinites
    • †Pulvinites lawrencei
  • †Puppigerus
    • †Puppigerus camperi
  • Pycnodonte
  • Fossilized skeleton of the Late Cretaceous-Eocene bony fish Pycnodus
    Pycnodus
  • †Pyropsis

Q
  • A living Quercus, or oak tree
    Quercus
  • Quinqueloculina
    • †Quinqueloculina compta
    • †Quinqueloculina jugosa
    • †Quinqueloculina lamarckiana
    • †Quinqueloculina lamarkiana
    • †Quinqueloculina microcosta
    • †Quinqueloculina peyana
    • †Quinqueloculina poeyana
    • †Quinqueloculina seminula

R
  • Raeta
    • †Raeta plicatella
  • Raja
  • Rallus
    • †Rallus limicola
  • †Rana
    • †Rana catesbiana – lapsus calami of Rana catesbeiana
    • †Rana clamitans – or unidentified comparable form
    • †Rana palustris
    • †Rana pipiens
    • †Rana sylvatica – or unidentified comparable form
  • Rangia
  • Rangifer
    • A living Rangifer tarandus, or reindeer
      †Rangifer tarandus
  • Ranzania
    • †Ranzania grahami – type locality for species
    • †Ranzania tenneyorum – type locality for species
  • †Raphoneis
    • †Raphoneis amphiceros
    • †Raphoneis lancettula
    • †Raphoneis scutula
  • †Rebeccapecten
    • †Rebeccapecten berryae
  • Reticulofenestra
  • †Retinella
    • †Retinella electrina
    • †Retinella virginica
  • Retusa
  • †Rhabdosteus
  • †Rhaphoneis
    • †Rhaphoneis gemmifera
    • †Rhaphoneis parilis
  • †Rhegnopsis
    • †Rhegnopsis palaeatlantica – type locality for species
  • Rhinobatos
    • †Rhinobatos bruxelliensis
  • A school of living Rhinoptera, or cownose rays
    Rhinoptera
    • †Rhinoptera sherboni
  • Rosalina
    • †Rosalina columbiensis
    • †Rosalina floridana
  • Rostellaria
  • †Rudiscala

S
  • Saccella
    • †Saccella catasarca – or unidentified comparable form
    • †Saccella concentrica
    • †Saccella parva
  • †Samlandia
  • †Sanganoma
  • †Sarda
    • †Sarda delheidi
  • Sayornis
    • A living Sayornis phoebe, or eastern phoebe
      †Sayornis phoebe
  • †Scala
    • †Scala virginiana – type locality for species
  • †Scalaspira – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Scalaspira strumosa
  • Scalopus
    • †Scalopus aquaticus
  • Scaphella
  • Scaphiopus
    • †Scaphiopus holbrooki
  • Sceloporus
    • †Sceloporus undulatus
  • †Sceptrum
    • †Sceptrum marylandicum
  • Fossilized skull of the Miocene toothed whale Schizodelphis
    †Schizodelphis
    • †Schizodelphis barnesi
    • †Schizodelphis sulcatus
  • Schizoporella
    • †Schizoporella errata
  • Sciaenops
    • †Sciaenops ocellatus
  • †Sciaenurus – or unidentified comparable form
    • †Sciaenurus bowerbanki
  • Sciuropterus
    • †Sciuropterus volans
  • Sciurus
    • A living Sciurus carolinensis, or eastern gray squirrel
      †Sciurus carolinensis
  • Scolopax
    • †Scolopax minor
  • Scomberomorus
    • †Scomberomorus bleekeri
  • †Scombrinus
  • Scyliorhinus
    • †Scyliorhinus gilberti
  • Seila
  • †Seiurus
  • Semele
    • †Semele bellastriata
    • †Semele purpurascens – or unidentified comparable form
    • †Semele subovata
  • †Semotilus
    • †Semotilus corporalis – or unidentified comparable form
  • Serpulorbis
    • †Serpulorbis granifera
    • †Serpulorbis granulifera
  • Fossilized teeth of the Cretaceous-Eocene shark Serratolamna
    †Serratolamna
    • †Serratolamna aschersoni
    • †Serratolamna lerichei
  • †Sialia – or unidentified comparable form
    • †Sialia sialis
  • Sinum
    • †Sinum fragilis
  • †Siphonocetus
    • †Siphonocetus priscus – type locality for species
  • Sitta
    • †Sitta canadensis
  • †Solarium
  • Solemya
  • Solen
  • Solenosteira
  • Sorex
    • †Sorex arcticus
    • †Sorex cinereus
    • †Sorex dispar
    • †Sorex fumeus
    • †Sorex hoyi
    • A living Sorex palustris, or American water shrew
      †Sorex palustris
  • †Spatangus
    • †Spatangus glenni
  • Spermophilus
    • †Spermophilus tridecemlineatus
  • Sphaerium
    • †Sphaerium striatinum
  • †Sphaeroidinellopsis
    • †Sphaeroidinellopsis subdehiscens
  • Sphenia
    • †Sphenia dubia
  • Sphyraena
    • †Sphyraena bognorensis
  • †Sphyrapicus
    • †Sphyrapicus varius
  • A living Sphyrna hammerhead shark
    Sphyrna
  • Spilogale
    • †Spilogale putorius
  • †Spirodon
    • †Spirodon carinata
  • Spisula
    • †Spisula modicella
    • †Spisula parilis
    • †Spisula praetenuis
    • †Spisula rappahannockensis
  • Life restoration of the Oligocene-Miocene shark-toothed dolphin Squalodon
    †Squalodon
    • †Squalodon calvertensis
    • †Squalodon protervus – or unidentified comparable form
    • †Squalodon whitmorei – type locality for species
  • Squalus
    • †Squalus crenatidens
  • Squatina
    • †Squatina prima
  • †Stenotrema
  • †Stephanopyxis
    • †Stephanopyxis grunowii
  • Stewartia
    • †Stewartia anodonta
  • Storeria
  • †Strepsidura
    • †Strepsidura perlatus
  • †Streptochetus – or unidentified comparable form
    • †Streptochetus potomacensis
  • Striarca
    • †Striarca centenaria
    • †Striarca centernaria
  • Fossilized teeth of the Paleocene-Miocene sandshark Striatolamia
    †Striatolamia
    • †Striatolamia macrota
  • Strioterebrum
    • †Strioterebrum carolinensis
    • †Strioterebrum concava
    • †Strioterebrum dislocatum
  • Strobilops
    • †Strobilops labyrinthica
  • Strombiformis
  • Sturnella – or unidentified comparable form
  • †Sullivanichthys – type locality for genus
    • †Sullivanichthys mccloskeyi – type locality for species
  • †Sumbos
    • †Sumbos cavifrons
  • Surculites
  • Sveltia – or unidentified comparable form
  • †Syllomus
    • †Syllomus aegyptiacus – type locality for species
    • †Syllomus crispatus
  • Sylvilagus
    • A living Sylvilagus transitionalis, or New England cottontail
      †Sylvilagus transitionalis
  • Symplocos
    • †Symplocos grimsleyi
  • Synaptomys
    • †Synaptomys cooperi
    • †Synaptomys corealis

T
  • Tagelus
    • †Tagelus plebeius
  • Tamias
    • †Tamias striatus
  • †Tamiasciurius
    • †Tamiasciurius hudsonicus
  • Tamiasciurus
    • †Tamiasciurus hudsonicus
    • †Tamiasciurus tenuidens – or unidentified comparable form
  • A living Tapirus, or tapir
    Tapirus
  • Tautoga
    • †Tautoga onitis
  • †Tectatodinium
    • †Tectatodinium pellitum
  • Tectonatica
  • Teinostoma
    • †Teinostoma harrisi
    • †Teinostoma umbilicatum
  • Shell of a Tellina, or tellin
    Tellina
    • †Tellina declivis
    • †Tellina leana
    • †Tellina propetenella
    • †Tellina virginiana – type locality for species
    • †Tellina williamsi
  • †Teratichthys
    • †Teratichthys antiquitatus
  • Terebra
  • Teredo
    • †Teredo virginiana
  • Terrapene
    • †Terrapene carolina
  • Textularia
  • †Thalassiphora
    • †Thalassiphora pelagica
  • Thamnophis
    • †Thamnophis sirtalis
  • Fossilized skeleton of the Oligocene-Miocene gavial relative Thecachampsa
    †Thecachampsa
    • †Thecachampsa antiqua
    • †Thecachampsa antiquua
  • †Thinocetus – type locality for genus
    • †Thinocetus arthritus – type locality for species
  • †Thoracosaurus
    • †Thoracosaurus neocesariensis
  • Thracia
  • †Thuja
  • A school of living Thunnus, or tunas
    Thunnus
  • Tilia
  • Tinospora
    • †Tinospora folmerii
  • Torcula
    • †Torcula variabilis
  • †Tornatellaea
  • Toxostoma
    • †Toxostoma rufum
  • Transennella
    • †Transennella carolinensis
  • †Tretosphys
  • Triakis
    • †Triakis wardi
  • Trigonostoma
  • Tringa – or unidentified comparable form
    • †Tringa solitaria
  • †Triodopsis
  • Triphora
  • †Triphotrocha
    • †Triphotrocha comprinata – or unidentified comparable form
  • Trochita
  • Trochocyathus
    • †Trochocyathus mitratus
  • Trox
  • †Tsuga
  • Tucetona
    • †Tucetona pectinata
  • Tudicla – or unidentified comparable form
  • †Turbinolia
    • †Turbinolia acuticostata
  • †Turbiosphaera – tentative report
  • Turbonilla
  • †Turborotalia – report made of unidentified related form or using admittedly obsolete nomenclature
    • †Turborotalia acostaensis
  • Turdus
    • †Turdus migratorius
  • Fossilized shells of the Late Jurassic-modern tower snail Turritella
    Turritella
    • †Turritella alticostata
    • †Turritella humerosa
    • †Turritella invariabilis
    • †Turritella nasuta
    • †Turritella pilsbryi
    • †Turritella potomacensis
    • †Turritella praecincta
    • †Turritella subvariabilis

U
  • Uria
    • A pair of living Uria aalge, or common murre
      †Uria aalge
  • Urosalpinx
    • †Urosalpinx cinera
    • †Urosalpinx cinerea
    • †Urosalpinx phrikina
    • †Urosalpinx rusticus
    • †Urosalpinx subrusticus
    • †Urosalpinx trossulus
  • Ursus
    • †Ursus americanus

V

W
  • †Wetherellia
    • †Wetherellia marylandica
  • †Wetzeliella

X
  • Xenophora
  • Fossilized skeleton of the Miocene whale Xiphiacetus
    †Xiphiacetus
    • †Xiphiacetus bossi – type locality for species
    • †Xiphiacetus cristatus – type locality for species

Y

Z
  • Zapus
    • †Zapus hudsonius
  • †Zarhachis
  • Zonotrichia
    • A living Zonotrichia albicollis, or white-throated sparrow
      †Zonotrichia albicollis

Notes
    gollark: Sorry, X crashed.
    gollark: Yes, thanks to cheating.
    gollark: ... why?
    gollark: <@133885827523674112> The only stuff I actually have is all the random junk from kits, stuff looted from buildings, a few ores and stuff from my mines, and a few components of a pulverizer.
    gollark: Wow it is very deadened.

    References
    • Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 7 August 2017.
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