List of the prehistoric life of South Dakota

This list of the prehistoric life of South Dakota contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of South Dakota.

Precambrian

The Paleobiology Database records no known occurrences of Precambrian fossils in Alabama.

Paleozoic

• †Acrotreta
• †Agnostogonus
  • †Agnostogonus incognitus – or unidentified comparable form

• File:Agnostus pisiformis Kinnekulle 1 CRF.jpg

  Assemblage of fossils of the Cambrian trilobite Agnostus

  †Agnostus
• †Amiaspis
  • †Amiaspis erratica
• †Ankoura
  • †Ankoura triangularis
  • †Ankoura triangularus
• †Aphelaspis
  • †Aphelaspis haguei
• †Arapahoia
  • †Arapahoia spathulata
  • †Arapahoia spatulata
• †Arcifimbria
  • †Arcifimbria pahasapaensis
• †Arcifimbrin
  • †Arcifimbrin pahasapaensis
• †Arcuolimbus
  • †Arcuolimbus convexus
• †Billingsella
  • †Billingsella wichitaensis
• †Blountia
  • †Blountia arcuosa
  • †Blountia arion
  • †Blountia bristolensis
  • †Blountia eleanora
  • †Blountia janei
  • †Blountia nixonensis
• †Blountiella
  • †Blountiella alberta
  • †Blountiella cordilleria
• †Briscoia
  • †Briscoia angustilimba – or unidentified comparable form
  • †Briscoia dalyi
• †Bynumia
  • †Bynumia eumus
• †Bynumina
• †Camaraspis

• File:Caseodus cropped.png

  Life restoration of the Carboniferous Chimaera relative Caseodus

  †Caseodus
  • †Caseodus eatoni – or unidentified related form
• †Cedaria
• †Cedarina
  • †Cedarina cordillerae
  • †Cedarina dakotaensis
  • †Cedarina dakotensis
• †Cheilocephalus
  • †Cheilocephalus brevilobus
• †Cladodus – or unidentified comparable form
• †Clelandia
  • †Clelandia typicalis
• †Coosella
  • †Coosella onusta
  • †Coosella perplexa
  • †Coosella prolifica
• †Coosia
  • †Coosia albertensis
  • †Coosia alethes
• †Coosina
  • †Coosina ariston
• †Crepicephalus
  • †Crepicephalus auratus
  • †Crepicephalus buttsimontanaenis
  • †Crepicephalus buttsimontanaensis
  • †Crepicephalus buttsimotanaensis
  • †Crepicephalus deadwoodensis
  • †Crepicephalus rectus
  • †Crepicephalus snowyenis
  • †Crepicephalus snowyensis
• †Cyrtogomphoceras
• †Dartonaspis
  • †Dartonaspis wichitaensis
  • †Dartonaspis witchitaensis
• †Deadwoodia
• †Dicellomus
• †Diestoceras
• †Dikelocephalus
  • †Dikelocephalus minnesotensis
• †Dresbachia
  • †Dresbachia amata

• File:Edestus protopirata1DB.jpg

  Life restoration of the Late Devonian-Carboniferous Chimaera relative Edestus

  †Edestus
• †Ellipsocephaloides
  • †Ellipsocephaloides curtus
  • †Ellipsocephaloides monensis
  • †Ellipsocephaloides monsensis
• †Endoceras
• †Eoorthis
  • †Eoorthis indianola
  • †Eoorthis remnicha
• †Ephippiorthoceras
• †Glaphyraspis
  • †Glaphyraspis newtoni
  • †Glaphyraspis parva
• †Hadragnostus
  • †Hadragnostus modestus
• †Hardyoides
  • †Hardyoides tenerus
• †Holmesella
  • †Holmesella quadrata
• †Homagnostus
  • †Homagnostus obesus

• File:Hyoliths01.JPG

  Fossilized shells of the Cambrian-Permian brachiopod relative Hyolitha

  †Hyolithes
• †Hysteropleura
  • †Hysteropleura schucherti
• †Idahoia
  • †Idahoia serapio
  • †Idahoia wisconsensis
• †Idiomesus
  • †Idiomesus granti
  • †Idiomesus infimus
• †Illaenurus
  • †Illaenurus priscus

• File:Janassa bituminosa.jpg

  Restoration of the Carboniferous-Permian ray-like cartilaginous fish Janassa (top and left)

  †Janassa
• †Kingstonia
  • †Kingstonia bealesoides
  • †Kingstonia scrinium
  • †Kingstonia spicata
  • †Kingstonia spicta
  • †Kingstonia walcotti
  • †Kingstonia walcottia
• †Komaspidella
  • †Komaspidella hata
  • †Komaspidella lata
• †Kormagnostus
  • †Kormagnostus beltensis
  • †Kormagnostus seclusus
• †Lambeoceras – tentative report
• †Lingulella
• †Lingulepis
• †Linnarssonella

• File:Listracanthus hystrix.JPG

  Restoration of the Carboniferous-Early Triassic cartilaginous fish Listracanthus

  †Listracanthus
  • †Listracanthus hystrix
• †Litagnostus
  • †Litagnostus paralis
• †Llanoaspis
  • †Llanoaspis undulata
• †Meniscocorypphe
  • †Meniscocorypphe platycephala
• †Menomonia
  • †Menomonia prooculis
• †Meteoraspis
  • †Meteoraspis keeganensis
  • †Meteoraspis metra
  • †Meteoraspis robusta
• †Modocia
  • †Modocia centralis
  • †Modocia oweni
• †Monocheilus
  • †Monocheilus micros
  • †Monocheilus truncatus
• †Nahannagnostus
  • †Nahannagnostus nganasanicus
  • †Nahannagnostus nganasanious
• †Parabolinoides
  • †Parabolinoides contractus
  • †Parabolinoides granulosus
• †Pemphigaspis
  • †Pemphigaspis bullata
• †Petrodus
  • †Petrodus patelliformis
• †Plethopeltis
• †Prosaukia
  • †Prosaukia misa
• †Pseudagnostus
  • †Pseudagnostus douvillei
  • †Pseudagnostus josephus
• †Ptchaspis
  • †Ptchaspis striata
• †Ptychaspis
  • †Ptychaspis bullasa
  • †Ptychaspis miniscaensis
• †Ptychopleurites
  • †Ptychopleurites spinosa
• †Pugionicauda
  • †Pugionicauda paradoxa
• †Rasettia
  • †Rasettia capax
  • †Rasettia magna
• †Saukiella
  • †Saukiella pyrene
• †Spyroceras
• †Syspacheilus
• †Taenicephalus
  • †Taenicephalus nasutus
  • †Taenicephalus shumardi
• †Terranovella
  • †Terranovella dorsalis

• File:Tricrepicephalus texanus CRF.jpg

  Fossil of the Cambrian trilobite Tricrepicephalus

  †Tricrepicephalus
  • †Tricrepicephalus conia
  • †Tricrepicephalus coria
  • †Tricrepicephalus metra
  • †Tricrepicephalus tripunctatus
• †Tripteroceras
• †Uncaspis
  • †Uncaspis limbata
  • †Uncaspis unca
• †Welleraspis
  • †Welleraspis group#1 – informal
  • †Welleraspis group#2 – informal
• †Westonoceras
• †Wilsonoceras
• †Winnipegoceras

Mesozoic

Main article: List of the Mesozoic life of South Dakota

Selected Mesozoic taxa of South Dakota

• Acipenser – or unidentified comparable form
• †Actinocamax
• †Adocus
• †Agerostrea

• File:Allosaurus Revised.jpg

  Restoration of the Late Jurassic theropod dinosaur Allosaurus

  †Allosaurus
• †Alphadon
  • †Alphadon marshi
• †Anatotitan
  • †Anatotitan copei
• †Anomia
• †Anzu – type locality for genus
  • †Anzu wyliei – type locality for species
• †Apatosaurus
• †Araucarioxylon

• File:Archelon skeleton.jpg

  Mounted fossilized skeleton of the Late Cretaceous sea turtle Archelon

  †Archelon – type locality for genus
  • †Archelon ischyros – type locality for species
• †Artocarpus – report made of unidentified related form or using admittedly obsolete nomenclature
• Aspideretes
• †Asplenium
• †Baculites
  • †Baculites clinolobatus
  • †Baculites compressus
  • †Baculites grandis
  • †Baculites larsoni
  • †Baculites ovatus
  • †Baculites yokoyamai
• †Bananogmius
• †Baptornis
  • †Baptornis varneri – type locality for species

• File:Barosaurus lentus1.jpg

  Restoration of the Late Jurassic sauropod dinosaur Barosaurus rearing to defend itself against a pair of the theropod Allosaurus

  †Barosaurus – type locality for genus
  • †Barosaurus lentus – type locality for species
• †Basilemys
• †Belemnitella
  • †Belemnitella bulbosa
• Beryx – or unidentified related form
• †Bolodon
  • †Bolodon hydei – type locality for species
• †Borealosuchus
  • †Borealosuchus sternbergii
• Brachidontes
• †Brachychampsa
  • †Brachychampsa montana
• †Brodavis
  • †Brodavis baileyi – type locality for species
• †Caenagnathus
• †Calycoceras
  • †Calycoceras boreale – type locality for species
  • †Calycoceras dromense – or unidentified comparable form

• File:Camarasaurs1.jpg

  Life restoration of a herd of the Late Jurassic sauropod dinosaur Camarasaurus

  †Camarasaurus
• Campeloma
• †Caturus
• †Champsosaurus
• †Cimexomys
• †Cimolodon
  • †Cimolodon nitidus
• †Cimolomys
  • †Cimolomys gracilis
• †Claosaurus
  • †Claosaurus affinis – type locality for species
• †Clidastes
  • †Clidastes propython
• †Cocculus

• File:Gasteropods - Ammonites - Collignoniceras woolgari.JPG

  Fossilized shell of the Late Cretaceous ammonoid Collignoniceras

  †Collignoniceras
  • †Collignoniceras collisniger – type locality for species
  • †Collignoniceras jorgenseni – type locality for species
  • †Collignoniceras percarinatum
  • †Collignoniceras praecox
  • †Collignoniceras vermilionense
  • †Collignoniceras woolgari
  • †Collignoniceras woollgari
• †Compsemys
• Corbula
• †Corbulamella
• †Crenella
  • †Crenella elegantula
• †Cretolamna
  • †Cretolamna appendiculata
• †Cteniogenys
• Cucullaea
• †Cuspidaria

• File:Cycadeoidea fossil cropped.png

  Fossil of the Jurassic-Cretaceous cycad relative Cycadeoidea

  †Cycadeoidea
  • †Cycadeoidea aspera – type locality for species
  • †Cycadeoidea cicatricula – type locality for species
  • †Cycadeoidea colei – type locality for species
  • †Cycadeoidea colossalis – type locality for species
  • †Cycadeoidea dacotensis
  • †Cycadeoidea excelsa – type locality for species
  • †Cycadeoidea formosa – type locality for species
  • †Cycadeoidea furcata – type locality for species
  • †Cycadeoidea ingens – type locality for species
  • †Cycadeoidea insolita – type locality for species
  • †Cycadeoidea jenneyana
  • †Cycadeoidea Jenneyana
  • †Cycadeoidea marshiana – type locality for species
  • †Cycadeoidea mcbridei – type locality for species
  • †Cycadeoidea McBridei – type locality for species
  • †Cycadeoidea minnekahtensis – type locality for species
  • †Cycadeoidea nana – type locality for species
  • †Cycadeoidea occidentalis – type locality for species
  • †Cycadeoidea paynei – type locality for species
  • †Cycadeoidea pulcherrima – type locality for species
  • †Cycadeoidea stillwelli – type locality for species
  • †Cycadeoidea turrita – type locality for species
  • †Cycadeoidea Wellsii – type locality for species
• †Dakotadon
  • †Dakotadon lakotaensis
• †Dakotaraptor – type locality for genus
  • †Dakotaraptor steini – type locality for species
• †Desmatochelys
• †Didelphodon
• †Diplodocus
• †Discoscaphites
  • †Discoscaphites conradi
  • †Discoscaphites gulosus
  • †Discoscaphites rossi – type locality for species
• †Dolichorhynchops
  • †Dolichorhynchops osborni
• †Edmontonia
  • †Edmontonia longiceps

• File:Anatotitan BW.jpg

  Life restoration of the Late Cretaceous duck-billed dinosaur Edmontosaurus annectens

  †Edmontosaurus
• †Elasmosaurus
  • †Elasmosaurus intermedius – type locality for species
• †Enchodus
• †Eubostrychoceras
• †Eucalycoceras
• †Eutrephoceras
• †Geosternbergia
  • †Geosternbergia maiseyi – type locality for species
• Gleichenia
• †Globidens
  • †Globidens alabamensis
  • †Globidens dakotensis – type locality for species
  • †Globidens schurmanni – type locality for species
• †Glyptops
• Glyptostrobus
  • †Glyptostrobus europaeus
• †Gorgosaurus
• †Hainosaurus
• †Hamites

• File:Hesperornis BW.jpg

  Life restoration of the Late Cretaceous toothed bird Hesperornis

  †Hesperornis
  • †Hesperornis regalis – or unidentified comparable form
• Hiatella – tentative report
• †Hoplitosaurus
  • †Hoplitosaurus marshi – type locality for species
• †Hoploparia
• †Hoploscaphites
  • †Hoploscaphites comprimus
  • †Hoploscaphites melloi – type locality for species
  • †Hoploscaphites nicolletii
• †Hulettia
• †Hypsilophodon
  • †Hypsilophodon wielandi – type locality for species
• †Ichthyodectes

• File:Inoceramus steenstrup, world's largest fossil mollusk.jpg

  Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size

  †Inoceramus
  • †Inoceramus apicalis
  • †Inoceramus ginterensis
  • †Inoceramus tenuis – or unidentified related form
  • †Inoceramus tenuistriatus – tentative report
• †Ischyodus
  • †Ischyodus rayhaasi
• Isurus
• †Jeletzkytes
  • †Jeletzkytes dorfi
  • †Jeletzkytes nebrascensis
  • †Jeletzkytes spedeni – type locality for species
• Lamna

• File:Leidyosuchus canadensis, Dinosaur Provincial Park, Alberta, Canada, Late Cretaceous - Royal Ontario Museum - DSC00090.JPG

  Fossilized skull of the Late Cretaceous alligator relative Leidyosuchus

  †Leidyosuchus
• †Lemnaceae
• †Lepidotes – tentative report
• Lepisosteus
• †Leptalestes
  • †Leptalestes cooki
  • †Leptalestes krejcii
• †Lucina – tentative report
• †Martinectes
  • †Martinectes bonneri
• †Melvius
• †Meniscoessus
  • †Meniscoessus robustus
• †Mesodma
  • †Mesodma formosa
  • †Mesodma hensleighi
  • †Mesodma thompsoni
• †Modiolus

• File:Mosasaurus BW.jpg

  Life restoration of two of the Late Cretaceous Mosasaurus

  †Mosasaurus
  • †Mosasaurus missouriensis – type locality for species
• †Myledaphus
  • †Myledaphus bipartitus
• †Nelumbo
• †Neocardioceras
  • †Neocardioceras transiens – type locality for species
• Nucula
  • †Nucula percrassa
• †Ophiomorpha
• †Ornithomimus
• †Osmakasaurus
  • †Osmakasaurus depressus – type locality for species
• Ostrea
• †Otoscaphites
• †Oxytoma

• File:Pachycephalosaurus wyomingensis dinosaur (Upper Cretaceous; Montana, USA).jpg

  Fossilized skeleton of the Late Cretaceous dome-headed dinosaur Pachycephalosaurus

  †Pachycephalosaurus – type locality for genus
  • †Pachycephalosaurus wyomingensis – type locality for species
• †Pachyrhizodus
• †Pahasapasaurus – type locality for genus
  • †Pahasapasaurus haasi – type locality for species
• †Palmoxylon
• Panopea
• †Paronychodon
  • †Paronychodon lacustris
• Pholadomya
• †Pistia – report made of unidentified related form or using admittedly obsolete nomenclature
• †Placenticeras
  • †Placenticeras pseudoplacenta
• Platanus

• File:Platecarpus2010.jpg

  Life restoration of the Late Cretaceous mosasaur Platecarpus

  †Platecarpus
  • †Platecarpus somenensis – or unidentified comparable form
  • †Platecarpus tympaniticus
• †Plesiobaena
• †Plioplatecarpus
  • †Plioplatecarpus primaevus – type locality for species
• †Prognathodon
  • †Prognathodon overtoni – type locality for species
• †Proplacenticeras
• †Protocardia
• †Protosphyraena
• †Protostega

• File:Pteranodon longiceps mmartyniuk wiki.png

  Life restoration of the Late Cretaceous pterosaur Pteranodon

  †Pteranodon
  • †Pteranodon longiceps
• †Ptychodus
  • †Ptychodus occidentalis
• Quercus
• †Rhamnus
• †Richardoestesia
  • †Richardoestesia isosceles
• Sassafras
• †Scaphites
• †Sequoia
• Solemya
• Sphaerium
• †Sphenobaiera
• †Sphenodiscus
  • †Sphenodiscus beecheri – tentative report
  • †Sphenodiscus lobatus
  • †Sphenodiscus pleurisepta
• Squalicorax
  • †Squalicorax falcatus
• Squalus

• File:Styxocycle by johnson mortimer-dafh0ce.gif

  Animated life restoration of the Late Cretaceous plesiosaur Styxosaurus

  †Styxosaurus
  • †Styxosaurus browni
  • †Styxosaurus snowii – type locality for species
• †Tatankaceratops – type locality for genus
  • †Tatankaceratops sacrisonorum – type locality for species
• Taxodium
• †Thescelosaurus
  • †Thescelosaurus neglectus
• †Thespesius – type locality for genus
  • †Thespesius occidentalis – type locality for species
• †Torosaurus
  • †Torosaurus latus
• †Toxochelys
  • †Toxochelys latiremis
• †Trachodon
• †Tragodesmoceras
  • †Tragodesmoceras carlilense
  • †Tragodesmoceras carlilensis
• †Triceratops
  • †Triceratops horridus
• †Tylosaurus
  • †Tylosaurus proriger

• File:Tyrannosaurus Rex Holotype.jpg

  Fossilized skeleton of the Late Cretaceous tyrannosaur Tyrannosaurus

  †Tyrannosaurus
  • †Tyrannosaurus rex
• Viviparus
• †Yezoites
• Yoldia
• Ziziphus

Cenozoic

Main article: List of the Cenozoic life of South Dakota

Selected Cenozoic taxa of South Dakota

• †Aelurodon
• †Aepycamelus
• †Agnotocastor
• †Agriochoerus
• Alligator
  • †Alligator prenasalis – type locality for species
• †Ambystoma
  • †Ambystoma tigrinum

• File:Amebelodon fricki.jpg

  Life restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932).

  †Amebelodon
• †Ampelopsis
• †Amphechinus
• †Anchitherium
• Antilocapra
  • †Antilocapra americana
• Apalone
• †Aphelops
• †Archaeocyon
• †Archaeohippus
• †Archaeotherium
• †Arctodus
  • †Arctodus simus
• †Arctonasua
• Azolla
• †Barbourofelis
  • †Barbourofelis whitfordi
• †Bathornis
  • †Bathornis veredus
• Bison

  • File:Bison latifrons fossil buffalo (Pleistocene; North America) 1 (15257877377).jpg

    Mounted fossilized skeleton of the Pleistocene Bison latifrons, or long-horned bison

    †Bison latifrons
• Blarina
  • †Blarina carolinensis – or unidentified comparable form
• †Bothriodon
• †Brachypsalis
• †Brachyrhynchocyon
• †Brontops
• Bufo
  • †Bufo woodhousei
• Buteo
• †Calippus
• †Camelops
• Canis

  • Skeletons look identical

    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 – or unidentified comparable form
  • †Canis latrans
  • †Canis lupus
• †Carpocyon
• Castor
  • †Castor canadensis – or unidentified comparable form
• †Catostomus
• Celtis
• Cercidiphyllum
• Charina
• Chrysemys
• Cnemidophorus
• †Colodon
• †Cormocyon
• †Cormohipparion

• File:Cosoryx fossil cropped.png

  Fossilized skull of the Miocene pronghorn Cosoryx

  †Cosoryx
  • †Cosoryx furcatus
• †Cranioceras
• Crotalus
• †Cynarctoides
  • †Cynarctoides acridens
  • †Cynarctoides lemur
  • †Cynarctoides roii
• †Cynarctus
• †Cynodesmus
• Cynomys
• †Daphoenus
• †Desmatippus
• †Desmatochoerus
• †Desmocyon
• †Diceratherium

• File:ExtmDinictis1921-029-11.jpg

  Life restoration of the Eocene-Miocene false saber-toothed cat Dinictis. Robert Bruce Horsfall (1913).

  †Dinictis
• †Dinohyus
• †Dipoides
• †Domnina
• †Duchesnehippus
• †Duchesneodus
• †Ectopocynus
• †Ekgmowechashala
  • †Ekgmowechashala philotau – type locality for species
• Elaphe
  • †Elaphe vulpina
• †Elomeryx
• †Enhydrocyon
• †Entelodon
• †Eopelobates
• †Epicyon
• Equus
  • †Equus francisci
  • †Equus giganteus – or unidentified comparable form
• †Etheostoma

• File:Eubelodon cropped.jpg

  Life restoration of the Miocene elephant relative Eubelodon

  †Eubelodon
• †Eucastor
• †Eucommia
• Eumeces
  • †Eumeces septentrionalis
• †Eusmilus
• Ficus
• Geomys
• †Gigantocamelus
• Glyptostrobus
• †Gomphotherium
• Graptemys

• File:Fossil maxilla Hemiauchenia Boulle.png

  Fossilized lower jaw of the Miocene-Pleistocene llama relative Hemiauchenia

  †Hemiauchenia
• †Hemicyon
• †Herpetotherium
  • †Herpetotherium fugax
• †Hesperocyon
• †Hesperotestudo
• Heterodon
• †Heteromeryx
• †Hipparion
• †Hippotherium
• †Homotherium – or unidentified comparable form
• †Hoplophoneus

• File:Hyaenodon NT small.jpg

  Life restoration of the Eocene-Miocene creodont mammal Hyaenodon

  †Hyaenodon
  • †Hyaenodon crucians
  • †Hyaenodon horridus
  • †Hyaenodon montanus – or unidentified comparable form
  • †Hyaenodon mustelinus – type locality for species
• Hyla
• †Hypertragulus
• †Hypisodus
• †Hypohippus
• †Hypolagus
• †Hyporhina – type locality for genus
  • †Hyporhina antiqua – type locality for species
• †Hyracodon
• Ictalurus
• †Ischyrocyon
• †Ischyromys
• †Lambdoceras
• Lampropeltis
• Lepisosteus
• Lepomis
• †Leptauchenia
• †Leptictis

• File:Leptocyon gregorii holotype AMNH 12879.jpg

  Illustration of a fossilized skull of the Oligocene-Miocene dog Leptocyon

  †Leptocyon
• †Leptomeryx
• Lepus
  • †Lepus americanus – or unidentified comparable form
• †Longirostromeryx
• †Macrorhineura – type locality for genus
  • †Macrorhineura skinneri – type locality for species
• †Mammacyon
• †Mammuthus

  • Painting of a family of mammoths walking

    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
• Martes
• †Megacerops
• †Megachoerus – tentative report
• †Megaleptictis
  • †Megaleptictis altidens
• †Megalictis
  • †Megalictis ferox – type locality for species
• †Megalonyx
  • †Megalonyx leptostomus
  • †Megalonyx wheatleyi
• †Megapaloelodus – type locality for genus
• †Menoceras
• †Menops
• †Merychippus

• File:Merychyus cropped.png

  Restoration of a herd of the Eocene-Miocene oreodont mammal Merychyus

  †Merychyus
• †Merycochoerus
• †Merycodus
• †Merycoides
• †Merycoidodon
• †Mesocyon
• †Mesohippus
• †Mesoreodon
• †Metamynodon
  • †Metamynodon planifrons
• †Michenia
• Microtus
• †Miniochoerus
• †Miohippus
  • †Miohippus grandis
• †Monosaulax
• †Moropus
• Mustela
• †Mylagaulus
• †Nannippus
• †Nanotragulus
• †Neohipparion – type locality for genus
• Neotoma
• Nerodia
  • †Nerodia sipedon
• †Nexuotapirus
• †Niglarodon
• †Nimravus
• Notophthalmus
• †Nototamias
• †Notropis
• †Noturus – tentative report
• Ondatra
• Onychomys
• †Oreodontoides
• Ortalis
• †Osbornodon
• †Otarocyon
• †Oxetocyon
• †Oxydactylus

• File:Palaeocastor.jpg

  Spiral-shaped fossilized burrow and associated skeleton of the Oligocene-Miocene beaver Palaeocastor

  †Palaeocastor
• †Palaeogale
• †Palaeolagus
• †Paracrax
• †Paradaphoenus
• †Paraenhydrocyon
• †Parahippus
• †Paramys
• †Paratomarctus
• †Paratylopus
• †Parictis
• †Peltosaurus
  • †Peltosaurus granulosus
• †Peraceras
• Perognathus
• Peromyscus
• †Philotrox
  • †Philotrox condoni
• †Phlaocyon
  • †Phlaocyon minor
• Phrynosoma
  • †Phrynosoma douglassi
• †Planera
• †Platygonus
• †Pliauchenia
• †Pliohippus

• File:Poebrotherium.jpg

  Life restoration of the Eocene-Oligocene camel Poebrotherium

  †Poebrotherium
• †Pogonodon
• †Procamelus
• †Procastoroides
• †Promartes
• †Promerycochoerus
• †Proscalops
• †Protapirus
• †Proterix
• †Protoceras
• †Protohippus
• †Protolabis
• Pseudacris

• File:Pseudaelurus cropped.png

  Restoration of the Miocene cat Pseudaelurus

  †Pseudaelurus
• †Pseudhipparion
• †Pseudoprotoceras
• Querquedula
• †Rana
  • †Rana catesbeiana
  • †Rana pipiens
• Reithrodontomys
• Rhineura
• Salvadora
• Scaphiopus
• †Sespia
• Sorex
  • †Sorex cinereus
• Spea
• Spermophilus

• File:Stegomastodon mirificus - Smithsonian.JPG

  Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon

  †Stegomastodon
  • †Stegomastodon mirificus
• †Steneofiber
• Strix
• †Stylemys
• †Subhyracodon
• †Sunkahetanka
  • †Sunkahetanka geringensis
• Sylvilagus
  • †Sylvilagus floridanus
• Tapirus

• File:Teleoceras Horsfall cropped.jpg

  Restoration of the Miocene-Pliocene rhinoceros Teleoceras

  †Teleoceras
  • †Teleoceras major
• Thamnophis
  • †Thamnophis sirtalis
• Thomomys
• †Titanotylopus
• †Trigenicus
• †Trigonias
• Tympanuchus
• †Ursavus
• †Ustatochoerus
• Zapus
• Zelkova

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.