List of the Cenozoic life of South Dakota

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

A

• †Adeloblarina
  • †Adeloblarina berklandi – or unidentified comparable form
• †Adjidaumo
  • †Adjidaumo lophatus
  • †Adjidaumo minutus
• †Aelurodon
  • †Aelurodon ferox
  • †Aelurodon taxoides
• †Aepinacodon
  • †Aepinacodon deflectus – type locality for species

• 

  Life restoration of the Miocene camel Aepycamelus, or the long-necked camel. Heinrich Harder (1920).

  †Aepycamelus
• †Agnotocastor
  • †Agnotocastor coloradensis
  • †Agnotocastor praetereadens – type locality for species
• †Agriochoerus
  • †Agriochoerus antiquus
  • †Agriochoerus gaudryi – type locality for species
• †Alilepus – tentative report
• †Alismaphyllites
  • †Alismaphyllites grandifolius
• †Allantodiopsis
  • †Allantodiopsis erosa
• Alligator

  • 

    Fossilized skeleton of the Oligocene Alligator prenasalis

    †Alligator prenasalis – type locality for species
• †Allomys
  • †Allomys harkseni
  • †Allomys storeri – type locality for species
• †Allophaiomys
  • †Allophaiomys pliocaenicus
• †Alwoodia
• †Ambystoma
  • †Ambystoma minshalli
  • †Ambystoma tigrinum

• 

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

  †Amebelodon
• †Ameiseophis
  • †Ameiseophis robinsoni
• †Ampelopsis
  • †Ampelopsis acerifolia
• †Amphechinus
  • †Amphechinus horncloudi
• †Amphicaenopus
  • †Amphicaenopus platycephalus – type locality for species
• †Amynodontopsis
  • †Amynodontopsis bodei
• †Anchitherium
  • †Anchitherium clarencei
• †Ansomys
  • †Ansomys cyanotephrus – type locality for species
• Antilocapra
  • †Antilocapra americana
• Apalone
  • †Apalone leucopotamica
• †Aphelops
  • †Aphelops megalodus
• †Apternodus
  • †Apternodus mediaevus
• †Archaeocyon
  • †Archaeocyon leptodus
  • †Archaeocyon pavidus
• †Archaeohippus
  • †Archaeohippus blackbergi – or unidentified comparable form
• †Archaeolagus
  • †Archaeolagus macrocephalus – type locality for species
  • †Archaeolagus primigenius – type locality for species

• 

  Life restoration of the Eocene-Oligocene entelodont mammal Archaeotherium

  †Archaeotherium
  • †Archaeotherium lemleyi – type locality for species
  • †Archaeotherium marshi – type locality for species
  • †Archaeotherium mortoni
  • †Archaeotherium trippensis – type locality for species
• †Arctodus
  • †Arctodus simus
• †Arctonasua
• †Arretotherium
  • †Arretotherium fricki
  • †Arretotherium leptodus – type locality for species
• Azolla
  • †Azolla schopfi – type locality for species

B

• 

  Fossilized skull of the Miocene-Pliocene false saber-toothed cat Barbourofelis

  †Barbourofelis
  • †Barbourofelis whitfordi
• †Barbouromeryx
  • †Barbouromeryx trigonocorneus
• †Bathornis
  • †Bathornis celeripes
  • †Bathornis veredus
• Bison
  • †Bison latifrons
• Blarina
  • †Blarina carolinensis – or unidentified comparable form
• †Boochoerus
  • †Boochoerus angustus – type locality for species
• †Bothriodon
  • †Bothriodon americanus – type locality for species
  • †Bothriodon rostratus
• †Brachyerix
  • †Brachyerix incertis – or unidentified comparable form
• †Brachygaulus – or unidentified comparable form
• †Brachypsalis
  • †Brachypsalis modicus

• 

  Skeletal reconstruction of the Eocene-Oligocene bear-dog Brachyrhynchocyon

  †Brachyrhynchocyon
  • †Brachyrhynchocyon dodgei
• †Brontops
  • †Brontops bicornutus
  • †Brontops brachycephalus
  • †Brontops dispar
  • †Brontops robustus – type locality for species
  • †Brontops tyleri – type locality for species
• Bufo
  • †Bufo pliocompactilis
  • †Bufo woodhousei
• Buteo
  • †Buteo grangeri – type locality for species

C

• †Calamagras
  • †Calamagras angulatus
  • †Calamagras weigeli
• †Calippus
  • †Calippus martini
  • †Calippus placidus

• 

  Life restoration of the Pliocene-Holocene camel Camelops

  †Camelops
• Canis
  • †Canis dirus – or unidentified comparable form
  • †Canis latrans
  • †Canis lupus
• †Capacikala
  • †Capacikala parvus
• †Capatanka
  • †Capatanka gaulodon
  • †Capatanka minor
• †Carpocyon
  • †Carpocyon robustus
• Castor
  • †Castor canadensis – or unidentified comparable form
  • †Castor peninsulatus
• †Catostomus
• Celtis
• †Centetodon
  • †Centetodon magnus
  • †Centetodon marginalis
  • †Centetodon wolffi
• Cercidiphyllum
  • †Cercidiphyllum arcticum

• 

  A living Charina boa

  Charina
  • †Charina prebottae
• Chrysemys
  • †Chrysemys antiqua
• †Clinopternodus
  • †Clinopternodus gracilis
• Cnemidophorus
• †Colodon
  • †Colodon cingulatus
  • †Colodon occidentalis
• †Copemys
  • †Copemys longidens
• †Coprophis – type locality for genus
  • †Coprophis dakotaensis – type locality for species
• †Cormocyon
  • †Cormocyon haydeni – type locality for species
• †Cormohipparion
  • †Cormohipparion fricki
  • †Cormohipparion quinni
• †Cosoryx
  • †Cosoryx furcatus

• 

  Restoration of the Miocene palaeomerycid Cranioceras, a relative of modern deer, with anachronistic human to scale

  †Cranioceras
  • †Cranioceras unicornis
• Crotalus
• †Crucimys
  • †Crucimys milleri
• †Cupidinimus
  • †Cupidinimus smaragdinus – type locality for species
• †Cymaprimadon
  • †Cymaprimadon kenni – type locality for species
• †Cynarctoides
  • †Cynarctoides acridens
  • †Cynarctoides lemur
  • †Cynarctoides roii
• †Cynarctus
  • †Cynarctus crucidens
• †Cynodesmus
  • †Cynodesmus thooides
• Cynomys

D

• †Dakotallomys
  • †Dakotallomys lillegraveni
  • †Dakotallomys pelycomyoides
• †Dakotaophis – type locality for genus
  • †Dakotaophis greeni – type locality for species

• 

  Life restoration of the Eocene-Miocene bear dog Daphoenus

  †Daphoenus
  • †Daphoenus hartshornianus
  • †Daphoenus vetus
• †Dendrochen – type locality for genus
  • †Dendrochen robusta – type locality for species
• †Desmathyus
  • †Desmathyus pinensis
• †Desmatippus
  • †Desmatippus texanus
• †Desmatochoerus
  • †Desmatochoerus megalodon
• †Desmocyon
  • †Desmocyon thomsoni
• †Diceratherium
  • †Diceratherium annectens
  • †Diceratherium armatum – type locality for species
  • †Diceratherium radtkei
  • †Diceratherium tridactylum – type locality for species
• †Dikkomys
  • †Dikkomys matthewi
• †Dinictis
  • †Dinictis felina
• †Dinohyus
• †Dipoides
• †Disallomys
  • †Disallomys robustus
• †Domnina
  • †Domnina dakotensis – type locality for species
  • †Domnina gradata
  • †Domnina greeni – type locality for species
• †Domninoides
  • †Domninoides riparensis – type locality for species
• †Douglassciurus
  • †Douglassciurus bjorki – type locality for species
• †Downsimus
  • †Downsimus chadwicki – type locality for species
• †Duchesnehippus
  • †Duchesnehippus intermedius

• 

  Illustration of the fossilized jaws and teeth of the Eocene brontothere mammal Duchesneodus

  †Duchesneodus
  • †Duchesneodus uintensis

E

• †Ectopocynus
  • †Ectopocynus antiquus
• †Ekgmowechashala
  • †Ekgmowechashala philotau – type locality for species
• Elaphe
  • †Elaphe nebraskensis
  • †Elaphe vulpina
• †Elomeryx
  • †Elomeryx armatus – type locality for species
  • †Elomeryx garbanii – type locality for species
• †Enhydrocyon
  • †Enhydrocyon crassidens – type locality for species
  • †Enhydrocyon pahinsintewakpa

• 

  Life restoration of the Eocene-Oligocene mammal Entelodon. Charles R. Knight.

  †Entelodon
  • †Entelodon coarctatus – or unidentified comparable form
• †Entoptychus
  • †Entoptychus leptophrys
• †Eopelobates
  • †Eopelobates grandis – type locality for species
• †Epeiromys
• †Epicyon
  • †Epicyon saevus
• Equus
  • †Equus francisci
  • †Equus giganteus – or unidentified comparable form
• †Etheostoma

• 

  Life restoration of the Miocene elephant relative Eubelodon

  †Eubelodon
  • †Eubelodon morrilli
• †Eucastor
  • †Eucastor tortus
• †Eucommia
  • †Eucommia serrata
• Eumeces
  • †Eumeces septentrionalis
• †Eumys
  • †Eumys brachyodus
  • †Eumys elegans
• †Eusmilus
  • †Eusmilus sicarius
• †Eutypomys
  • †Eutypomys montanensis – or unidentified comparable form
  • †Eutypomys thomsoni – type locality for species
  • †Eutypomys wilsoni – or unidentified comparable form

F

• 

  A living Ficus, or fig tree

  Ficus
  • †Ficus artocarpoides
  • †Ficus subtruncata
• †Florentiamys
  • †Florentiamys agnewi – type locality for species
  • †Florentiamys tiptoni
• †Fossorcastor
  • †Fossorcastor brachyceps

G

• †Galbreathia
  • †Galbreathia novellus
• Geomys
• †Geringia
  • †Geringia gloveri
  • †Geringia mcgregori
• †Gigantocamelus
  • †Gigantocamelus spatulus
• Glyptostrobus
  • †Glyptostrobus nordenskioldi

• 

  Mounted fossilized skeleton of the Miocene-Pleistocene elephant relative Gomphotherium

  †Gomphotherium
  • †Gomphotherium obscurum
• †Grangerimus
  • †Grangerimus dakotensis
• Graptemys
• †Gregorymys
  • †Gregorymys curtus – type locality for species
  • †Gregorymys formosus – type locality for species
• †Gripholagomys – type locality for genus
  • †Gripholagomys lavocati – type locality for species
• †Guildayomys
  • †Guildayomys hibbardi – or unidentified comparable form

H

• †Haplomys
  • †Haplomys galbreathi – type locality for species
• †Heliscomys
  • †Heliscomys senex
• †Hemiauchenia
• †Hemicyon
  • †Hemicyon barbouri
• †Heptacodon
  • †Heptacodon curtus – type locality for species
  • †Heptacodon gibbiceps – type locality for species
  • †Heptacodon occidentale
• †Herpetotherium
  • †Herpetotherium fugax
  • †Herpetotherium youngi

• 

  Life restoration of the Eocene-Oligocene dog Hesperocyon. Robert Bruce Horsfall (1913).

  †Hesperocyon
  • †Hesperocyon gregarius
• †Hesperolagomys – tentative report
• †Hesperopetes
  • †Hesperopetes blacki – type locality for species
  • †Hesperopetes jamesi – type locality for species
• †Hesperotestudo
  • †Hesperotestudo niobrarensis
• Heterodon
• †Heteromeryx
  • †Heteromeryx dispar – type locality for species
• †Hibbarderix
  • †Hibbarderix obfuscatus
• †Hibbardomys
  • †Hibbardomys marthae – or unidentified comparable form
  • †Hibbardomys zakrzewskii

• 

  Life restoration of a herd of the Miocene-Pleistocene horse Hipparion. Heinrich Harder (1920).

  †Hipparion
  • †Hipparion tehonense
• †Hippotherium
  • †Hippotherium dolichops – type locality for species
• †Hitonkala
  • †Hitonkala andersontau – type locality for species
• †Homotherium – or unidentified comparable form
• †Hoplophoneus
  • †Hoplophoneus cerebralis
  • †Hoplophoneus mentalis
  • †Hoplophoneus occidentalis
  • †Hoplophoneus primaevus

• 

  Life restoration of the Eocene-Miocene creodont mammal Hyaenodon

  †Hyaenodon
  • †Hyaenodon brevirostrus – type locality for species
  • †Hyaenodon crucians
  • †Hyaenodon horridus
  • †Hyaenodon montanus – or unidentified comparable form
  • †Hyaenodon mustelinus – type locality for species
• Hyla
• †Hypertragulus
  • †Hypertragulus calcaratus
  • †Hypertragulus dakotensis – type locality for species
• †Hypisodus
  • †Hypisodus minimus

• 

  Life restoration of the Miocene horse Hypohippus. Heinrich Harder (1920).

  †Hypohippus
• †Hypolagus
  • †Hypolagus fontinalis – type locality for species
  • †Hypolagus vetus – or unidentified comparable form
• †Hyporhina – type locality for genus
  • †Hyporhina antiqua – type locality for species
• †Hyracodon
  • †Hyracodon leidyanus – type locality for species
  • †Hyracodon nebraskensis
  • †Hyracodon priscidens – or unidentified comparable form

I

• Ictalurus
• †Ischyrocyon
  • †Ischyrocyon gidleyi

• 

  Mounted fossilized skeleton of the Eocene-Oligocene rodent Ischyromys

  †Ischyromys
  • †Ischyromys typus

J

• †Javazapus
  • †Javazapus weeksi

K

• †Kirkomys
  • †Kirkomys martintau
  • †Kirkomys nebraskensis

L

• †Lambdoceras
  • †Lambdoceras hessei – type locality for species
• Lampropeltis
  • †Lampropeltis similis
• †Leidymys
  • †Leidymys blacki
  • †Leidymys juxtaparvulus
• Lepisosteus
• Lepomis
• †Leptarctus
  • †Leptarctus primus – type locality for species

• 

  Restoration of the Oligocene-Miocene oreodont mammal Leptauchenia

  †Leptauchenia
  • †Leptauchenia decora – type locality for species
  • †Leptauchenia major – type locality for species
• †Leptictis
  • †Leptictis dakotensis
  • †Leptictis haydeni
• †Leptochoerus
  • †Leptochoerus elegans
  • †Leptochoerus supremus – type locality for species
• †Leptocyon
  • †Leptocyon delicatus – type locality for species
  • †Leptocyon douglassi
  • †Leptocyon gregorii
  • †Leptocyon matthewi
  • †Leptocyon vafer – or unidentified comparable form
  • †Leptocyon vulpinus

• 

  Life restoration of the Eocene-Oligocene even-toed ungulate Leptomeryx

  †Leptomeryx
  • †Leptomeryx evansi
• †Leptoromys
  • †Leptoromys wilsoni – type locality for species
• Lepus
  • †Lepus americanus – or unidentified comparable form
  • †Lepus ennisianus – or unidentified comparable form
• †Lignimus
  • †Lignimus austridakotensis – type locality for species
• †Limnoecus
  • †Limnoecus compressus – or unidentified comparable form
  • †Limnoecus niobrarensis
• †Longirostromeryx
  • †Longirostromeryx wellsi – type locality for species

M

• †Macrogenis
  • †Macrogenis crassigenis
• †Macrognathomys
  • †Macrognathomys gemmacolis – type locality for species
• †Macrorhineura – type locality for genus
  • †Macrorhineura skinneri – type locality for species
• †Mammacyon
  • †Mammacyon obtusidens – type locality for species
• †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 primigenius
• †Manitsha – type locality for genus
  • †Manitsha tanka – type locality for species
• Martes
  • †Martes campestris
• †Megacerops
  • †Megacerops coloradensis
  • †Megacerops curtus
• †Megachoerus – tentative report
  • †Megachoerus latidens – type locality for species
• †Megalagus
  • †Megalagus primitivus – or unidentified comparable form
  • †Megalagus turgidus
• †Megaleptictis
  • †Megaleptictis altidens
• †Megalictis
  • †Megalictis ferox – type locality for species
• †Megalonyx
  • †Megalonyx leptostomus
  • †Megalonyx wheatleyi
• †Megapaloelodus – type locality for genus
  • †Megapaloelodus connectens – type locality for species
• †Megasminthus
  • †Megasminthus gladiofex – type locality for species
  • †Megasminthus tiheni
• †Megoreodon
  • †Megoreodon grandis
• †Meniscomys
  • †Meniscomys hippodus

• 

  Life restoration of the Miocene rhinoceros Menoceras

  †Menoceras
  • †Menoceras barbouri
• †Menops
  • †Menops marshi
  • †Menops serotinus
  • †Menops walcotti
• †Merychippus
  • †Merychippus insignis
• †Merychyus
  • †Merychyus arenarum
  • †Merychyus minimus
  • †Merychyus novomexicanus

• 

  Restorative portrait of the Oligocene-Miocene oreodont mammal Merycochoerus

  †Merycochoerus
  • †Merycochoerus chelydra
  • †Merycochoerus matthewi – type locality for species
• †Merycodus
  • †Merycodus major – or unidentified comparable form
  • †Merycodus necatus
• †Merycoides
  • †Merycoides longiceps
  • †Merycoides pariogonus – or unidentified comparable form
• †Merycoidodon
  • †Merycoidodon bullatus – type locality for species
  • †Merycoidodon culbertsoni – type locality for species
  • †Merycoidodon major

• 

  Skull fossils of the Oligocene-Miocene dog Mesocyon

  †Mesocyon
  • †Mesocyon temnodon
• †Mesohippus
  • †Mesohippus bairdi
  • †Mesohippus exoletus
• †Mesoreodon
  • †Mesoreodon chelonyx
  • †Mesoreodon minor
• †Mesoscalops

• 

  Restoration of the Eocene-Miocene swamp rhinoceros Metamynodon. Charles R. Knight (1896).

  †Metamynodon
  • †Metamynodon chadronensis – type locality for species
  • †Metamynodon planifrons
• †Michenia
  • †Michenia exilis
• Microtus
  • †Microtus meadensis
  • †Microtus paroperarius
• Mictomys
  • †Mictomys kansasensis
• †Mimomys
  • †Mimomys dakotaensis
• †Miniochoerus
  • †Miniochoerus affinis
  • †Miniochoerus forsythae
  • †Miniochoerus gracilis
  • †Miniochoerus starkensis – type locality for species
• †Mioheteromys
  • †Mioheteromys arcarius

• 

  Fossilized skull of the Eocene-Oligocene three-toed horse Miohippus

  †Miohippus
  • †Miohippus annectens – type locality for species
  • †Miohippus equiceps
  • †Miohippus equinanus
  • †Miohippus gemmarosae – or unidentified comparable form
  • †Miohippus gidleyi – type locality for species
  • †Miohippus grandis
  • †Miohippus intermedius – type locality for species
  • †Miohippus obliquidens – type locality for species
• †Mionictis
  • †Mionictis pristinus
• †Miortyx – type locality for genus
  • †Miortyx teres – type locality for species
• †Miospermophilus – or unidentified comparable form
• †Monosaulax
  • †Monosaulax curtus – or unidentified comparable form
• †Moropus
• Mustela
• †Mustelavus
  • †Mustelavus priscus – type locality for species
• †Mylagaulus
  • †Mylagaulus sesquipedalis – or unidentified comparable form
• †Mystipterus
  • †Mystipterus martini – or unidentified comparable form

N

• 

  Partial fossilized mandible of the Miocene-Pliocene horse Nannippus

  †Nannippus
• †Nanotragulus
  • †Nanotragulus loomisi
  • †Nanotragulus ordinatus – type locality for species
• †Nelumbago
  • †Nelumbago montanum
• †Neohipparion – type locality for genus
  • †Neohipparion affine – type locality for species
• †Neonatrix
  • †Neonatrix elongata
• Neotoma
  • †Neotoma amplidonta – type locality for species
• Nerodia
  • †Nerodia sipedon
• Nettion
  • †Nettion greeni – type locality for species
• †Nexuotapirus
  • †Nexuotapirus marslandensis
• †Niglarodon
  • †Niglarodon koerneri

• 

  Illustration of the fossilized skull of the Oligocene false saber-toothed cat Nimravus

  †Nimravus
  • †Nimravus sectator – type locality for species
• †Nothodipoides
  • †Nothodipoides planus
• Notophthalmus
  • †Notophthalmus crassus – type locality for species
• †Nototamias
  • †Nototamias quadratus
• †Notropis
• †Noturus – tentative report

O

• †Ocajila
  • †Ocajila makpiyahe – type locality for species
• †Octacodon
  • †Octacodon valens – type locality for species
• †Ogmophis
  • †Ogmophis miocompactus – type locality for species
• †Oligoryctes
  • †Oligoryctes altitalonidus
• †Oligoscalops
  • †Oligoscalops galbreathi
• †Oligospermophilus
• †Oligotheriomys
  • †Oligotheriomys magnus – type locality for species
• Ondatra
  • †Ondatra annectens
• Onychomys
  • †Onychomys pedroensis
• †Oreodontoides
  • †Oreodontoides oregonensis
• Ortalis
  • †Ortalis pollicaris – type locality for species
• †Osbornodon
  • †Osbornodon sesnoni
• †Otarocyon
  • †Otarocyon cooki
  • †Otarocyon macdonaldi – type locality for species
• †Oxetocyon
  • †Oxetocyon cuspidatus – type locality for species

• 

  Mounted fossilized skeleton of the Oligocene-Miocene camel Oxydactylus

  †Oxydactylus
  • †Oxydactylus lacota – type locality for species
  • †Oxydactylus wyomingensis – or unidentified comparable form

P

• †Paciculus
  • †Paciculus cedrus – type locality for species
  • †Paciculus montanus – or unidentified comparable form
  • †Paciculus nebraskensis – or unidentified comparable form
  • †Paciculus woodi
• †Palaeoborus
  • †Palaeoborus rosatus – type locality for species

• 

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

  †Palaeocastor
  • †Palaeocastor peninsulatus
  • †Palaeocastor wahlerti
• †Palaeogale
  • †Palaeogale dorothiae – type locality for species
  • †Palaeogale sectoria
• †Palaeolagus
  • †Palaeolagus burkei
  • †Palaeolagus haydeni
  • †Palaeolagus hypsodus
  • †Palaeolagus intermedius
  • †Palaeolagus philoi – type locality for species
• †Palaeonossax – type locality for genus
  • †Palaeonossax senectus – type locality for species
• †Paleoheterodon
  • †Paleoheterodon tiheni
• †Parablastomeryx
  • †Parablastomeryx gregorii
• †Paracrax
  • †Paracrax gigantea – type locality for species
  • †Paracrax wetmorei – type locality for species
• †Paradaphoenus
  • †Paradaphoenus minimus
  • †Paradaphoenus tooheyi – type locality for species
• †Paradjidaumo
  • †Paradjidaumo trilophus
• †Paraenhydrocyon
  • †Paraenhydrocyon robustus
• †Parahippus
  • †Parahippus cognatus – or unidentified comparable form
  • †Parahippus pawniensis
  • †Parahippus pristinus – type locality for species
• †Paramerychyus
  • †Paramerychyus harrisonensis
  • †Paramerychyus relictus
• †Paramys
  • †Paramys relictus
• †Paranymphaea
  • †Paranymphaea crassifolia
• †Paranyroca – type locality for genus
  • †Paranyroca magna – type locality for species
• †Parapliosaccomys
  • †Parapliosaccomys hibbardi – or unidentified related form
• †Paratomarctus
  • †Paratomarctus euthos
• †Paratylopus
  • †Paratylopus labiatus
• †Parictis
  • †Parictis dakotensis – type locality for species
  • †Parictis gilpini – type locality for species
  • †Parictis major – type locality for species
  • †Parictis parvus – type locality for species
• †Parvericius
  • †Parvericius montanus

• 

  Fossilized skull of the Eocene-Oligocene lizard Peltosaurus

  †Peltosaurus
  • †Peltosaurus granulosus
• †Pelycomys
  • †Pelycomys placidus
• †Penetrigonias
  • †Penetrigonias dakotensis
• †Peraceras
  • †Peraceras superciliosum
• †Perchoerus
  • †Perchoerus minor
  • †Perchoerus nanus
  • †Perchoerus probus – or unidentified comparable form
• Perognathus
  • †Perognathus brevidens
  • †Perognathus coquorum – or unidentified comparable form
  • †Perognathus trojectioansrum
• Peromyscus
• †Philotrox
  • †Philotrox condoni
• †Phlaocyon
  • †Phlaocyon minor
• Phrynosoma
  • †Phrynosoma douglassi
• †Planera
  • †Planera raynoldsi

• 

  Restoration of a herd of alarmed Miocene-Pleistocene peccaries of the genus Platygonus. Charles R. Knight (1922).

  †Platygonus
• †Plesiosorex
  • †Plesiosorex coloradensis
  • †Plesiosorex donroosai – type locality for species
• †Pleurolicus
  • †Pleurolicus clasoni
  • †Pleurolicus dakotensis – type locality for species
  • †Pleurolicus sulcifrons
• †Pliauchenia
  • †Pliauchenia magnifontis
• †Pliogale
  • †Pliogale manka

• 

  Fossilized skull of the Miocene horse Pliohippus

  †Pliohippus
  • †Pliohippus pernix
• †Pliophenacomys
  • †Pliophenacomys osborni – or unidentified comparable form
• †Pliosaccomys
  • †Pliosaccomys dubius – or unidentified comparable form
• †Poebrotherium
  • †Poebrotherium wilsoni
• †Pogonodon
  • †Pogonodon brachyops
  • †Pogonodon cismontanus – type locality for species
  • †Pogonodon eileenae
• †Problastomeryx
  • †Problastomeryx primus
• †Procamelus
  • †Procamelus grandis
• †Procastoroides
  • †Procastoroides sweeti – or unidentified comparable form
• †Procrax – type locality for genus
  • †Procrax brevipes – type locality for species
• †Prodipodomys
  • †Prodipodomys idahoensis
• †Prodipoides
  • †Prodipoides dividerus
• †Proharrymys
  • †Proharrymys fedti – type locality for species
  • †Proharrymys schlaikjeri
  • †Proharrymys wahlerti
• †Proheteromys
  • †Proheteromys gremmelsi – type locality for species
  • †Proheteromys ironcloudi – type locality for species
  • †Proheteromys matthewi – type locality for species
• †Promartes
  • †Promartes gemmarosae
  • †Promartes lepidus – type locality for species
  • †Promartes olcotti

• 

  Restoration of the Miocene hippopotamus-like oreodont Promerycochoerus both onshore and in the water. Robert Bruce Horsfall (1913).

  †Promerycochoerus
  • †Promerycochoerus carrikeri
  • †Promerycochoerus superbus
• †Promylagaulus
  • †Promylagaulus riggsi – type locality for species
• †Proscalops
  • †Proscalops evelynae – type locality for species
  • †Proscalops secundus
  • †Proscalops tertius
• †Prosciurus
  • †Prosciurus dawsonae
• †Prosthennops
  • †Prosthennops niobrarensis – or unidentified comparable form
• †Protapirus
  • †Protapirus obliquidens – type locality for species
  • †Protapirus simplex – type locality for species
• †Proterix
  • †Proterix bicuspis
  • †Proterix loomisi

• 

  Life restoration of a female (left) and male of the Oligocene-Miocene even-toed ungulate Protoceras. Charles R. Knight (1896).

  †Protoceras
  • †Protoceras celer
  • †Protoceras skinneri – type locality for species
• †Protohippus
  • †Protohippus supremus – type locality for species
• †Protolabis
  • †Protolabis heterodontus
• †Protospermophilus
• Pseudacris
  • †Pseudacris clarki – or unidentified comparable form
• †Pseudaelurus
• †Pseudhipparion
  • †Pseudhipparion gratum
  • †Pseudhipparion retrusum
• †Pseudoblastomeryx
  • †Pseudoblastomeryx advena
• †Pseudograptemys
  • †Pseudograptemys inornata – type locality for species

• 

  Fossilized skeleton of the Eocene protoceratid mammal Pseudoprotoceras

  †Pseudoprotoceras
  • †Pseudoprotoceras longinaris
  • †Pseudoprotoceras minor
• †Pseudotheridomys
• †Pseudotrimylus
  • †Pseudotrimylus dakotensis
• †Pterogaulus
• †Pterygoboa – type locality for genus
  • †Pterygoboa miocenica – type locality for species

Q

• †Quadrodens
  • †Quadrodens wilsoni – type locality for species
• Querquedula
  • †Querquedula integra – type locality for species

R

• †Rana

  • 

    A living Rana catesbeiana (sometimes Lithobates catesbeianus), or American bullfrog

    †Rana catesbeiana
  • †Rana pipiens
• Reithrodontomys
  • †Reithrodontomys moorei
• Rhineura
  • †Rhineura hatcherii – type locality for species
  • †Rhineura sepultura – type locality for species
• †Russellagus
  • †Russellagus vonhofi – or unidentified comparable form

S

• Salvadora
  • †Salvadora paleolineata
• †Sanctimus
  • †Sanctimus stuartae – type locality for species
• †Scalopoides
  • †Scalopoides isodens – or unidentified comparable form
• Scaphiopus
• †Scaptohyus
  • †Scaptohyus altidens – type locality for species
• †Schaubeumys
  • †Schaubeumys clivosus
  • †Schaubeumys galbreathi
  • †Schaubeumys grangeri – type locality for species
• †Schizodontomys
  • †Schizodontomys harkseni
• †Scottimus
  • †Scottimus exiguus
  • †Scottimus lophatus
• †Semotelus – tentative report
• †Sespia
  • †Sespia nitida – type locality for species
• †Sinclairella
  • †Sinclairella dakotensis
• Sorex
  • †Sorex cinereus
• Spea
  • †Spea neuter – type locality for species
• Spermophilus

• 

  Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon

  †Stegomastodon
  • †Stegomastodon mirificus
• †Steneofiber
  • †Steneofiber fossor
  • †Steneofiber gradatus
• †Stibarus
  • †Stibarus obtusilobus
  • †Stibarus quadricuspis
• Strix
  • †Strix dakota – type locality for species

• 

  Mounted fossilized skeleton of the Eocene-Oligocene tortoise Stylemys

  †Stylemys
  • †Stylemys nebrascensis
• †Subhyracodon
  • †Subhyracodon mitis
  • †Subhyracodon occidentalis
• †Sunkahetanka
  • †Sunkahetanka geringensis
• Sylvilagus
  • †Sylvilagus floridanus

T

• Tapirus

• 

  Restoration of the Miocene-Pliocene rhinoceros Teleoceras

  †Teleoceras
  • †Teleoceras major
• †Teleodus – type locality for genus
  • †Teleodus avus – type locality for species
• †Temperocastor
  • †Temperocastor valentinensis
• †Tenudomys
  • †Tenudomys macdonaldi – type locality for species
• Thamnophis
  • †Thamnophis sirtalis
• †Thinohyus
• Thomomys
• †Tisisthenes
  • †Tisisthenes parvus

• 

  Mounted fossilized skeleton of the Miocene-Pleistocene camel Titanotylopus

  †Titanotylopus
• †Trigenicus
  • †Trigenicus profectus
• †Trigonias
  • †Trigonias osborni
  • †Trigonias wellsi – type locality for species
• †Trilaccogaulus
  • †Trilaccogaulus ovatus
• †Triletes
  • †Triletes velus – type locality for species
• †Tylionomys
  • †Tylionomys woodi
• Tympanuchus
  • †Tympanuchus stirtoni – type locality for species
• †Tyrannomys
  • †Tyrannomys harkseni

U

• †Ursavus
• †Ustatochoerus
  • †Ustatochoerus medius

W

• †Wilsoneumys – tentative report
  • †Wilsoneumys planidens
• †Wilsonosorex
  • †Wilsonosorex bateslandensis
• †Woodoceras – type locality for genus
  • †Woodoceras brachyops – type locality for species

X

• †Xenochelys
  • †Xenochelys formosa – type locality for species

Z

• 

  A living Zapus jumping mouse

  Zapus
  • †Zapus sykesae
• Zelkova
  • †Zelkova planeroides

References

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