List of the prehistoric life of Kansas facts for kids

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

Precambrian

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

Paleozoic

Selected Paleozoic taxa of Kansas

• 

  Life restoration of the Early Devonian-Permian "spiny shark" Acanthodes
  †Acanthodes
• †Achistrum
• †Acitheca
• †Acrodus – tentative report
• †Acroplous
• †Actiobates – type locality for genus
  • †Actiobates peabodyi – type locality for species
• †Agassizodus
  • †Agassizodus variabilis
• †Aglaocrinus
• †Alethopteris
  • †Alethopteris grandini
  • †Alethopteris serlii
• Ammodiscus – tentative report
• †Amphiscapha
• † Ananias – tentative report
• †Annularia
  • †Annularia asteris
  • †Annularia mucronata
• †Aphlebia
• Archaeolithophyllum
• 

  Life restoration of the Carboniferous synapsid (mammal precursor) Archaeovenator
  †Archaeovenator – type locality for genus
  • †Archaeovenator hamiltonensis – type locality for species
• †Archimylacris
• †Aristoceras
• †Artisia
• †Asterotheca
  • †Asterotheca miltoni – or unidentified comparable form
• †Aviculopecten
  • †Aviculopecten arctisulcatus
  • †Aviculopecten mccoyi – type locality for species
  • †Aviculopecten nodocosta
  • †Aviculopecten occidentalis
  • †Aviculopecten peculiaris – type locality for species
  • †Aviculopecten sumnerensis – type locality for species
• 

  Restoration of the Carboniferous Chimaera relative Belantsea
  †Belantsea – or unidentified comparable form
• †Bellerophon
  • †Bellerophon graphicus – type locality for species
• †Blattoidea
• †Botryococcus
  • †Botryococcus braunii
• †Calamites
  • †Calamites cistii
• †Callipteris
  • †Callipteris conferta
  • †Callipteris lyratifolia – tentative report
• †Carbonita – tentative report
• 

  Life restoration of the Carboniferous Chimaera relative Caseodus
  †Caseodus
  • †Caseodus eatoni
• †Chomatodus
• †Chonetes
  • †Chonetes mesoloba
• †Cladodus
• Cladophlebis
• †Cleiothyridina
  • †Cleiothyridina orbicularis
• †Composita
  • †Composita elongata
  • †Composita ovata
  • †Composita subtilita
• †Cordaicarpus
• †Cordaites
  • †Cordaites principalis
• 

  Fossil of the Carboniferous shark Ctenacanthus
  †Ctenacanthus
  • †Ctenacanthus amblyxiphias
• †Cyathus
• †Cyclopteris
• †Cystodictya
• †Dentalium
• †Diplichnites
  • †Diplichnites gouldi
• †Ductilodon – type locality for genus
• †Dunbaria – type locality for genus
• †Echinaria
• †Edestus
  • †Edestus heinrichi – or unidentified comparable form
• †Edmondia
• 

  Life restoration of the Carboniferous synapsid (mammal precursor) Eocasea
  †Eocasea – type locality for genus
  • †Eocasea martini – type locality for species
• †Eoscopus – type locality for genus
  • †Eoscopus lockardi – type locality for species
• †Euconcordia – type locality for genus
• †Fenestella
• †Fusulina
• †Geinitzina
• †Gervillia
• †Glenopteris
• †Glikmanius
  • †Glikmanius occidentalis
• †Glyptopleura
• †Gordia
• †Helminthopsis
• †Hybodus
• 

  Restoration of the Carboniferous synapsid (mammal precursor) Ianthasaurus
  †Ianthasaurus – type locality for genus
  • †Ianthasaurus hardestiorum – type locality for species
• †Ianthodon – type locality for genus
  • †Ianthodon schultzei – type locality for species
• †Isogramma
• †Janassa
• †Kawichthys – type locality for genus
  • †Kawichthys moodiei – type locality for species
• †Kennedya – type locality for genus
• †Kirkella
• †Kouphichnium
• †Lepidodendron
• †Lingula
• †Lisca – type locality for genus
• †Lissodus
• 

  Restoration of the Carboniferous-Early Triassic cartilaginous fish Listracanthus
  †Listracanthus
• Lithophaga
• †Lysorophus
• †Meganeuropsis – type locality for genus
  • †Meganeuropsis permiana – type locality for species
• †Megatypus – type locality for genus
• †Metacoceras
• †Minilya
• †Misthodotes – type locality for genus
• †Modiolus
• †Naticopsis
• †Neoaganides
• †Neospirifer
  • †Neospirifer cameratus
  • †Neospirifer dunbari
  • †Neospirifer kansasensis
• †Neuropteris
  • †Neuropteris auriculata – tentative report
  • †Neuropteris odontopteroides
  • †Neuropteris ovata
  • †Neuropteris scheuchzeri
• †Noeggerathia
• †Norwoodia
• Nucula
• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
  †Ophiacodon – type locality for genus
  • †Ophiacodon hilli – type locality for species
• †Orodus
• †Orthacanthus
• †Palaeoniscus
• †Paleolimulus – type locality for genus
• †Pecopteris
  • †Pecopteris hemitelioides
  • †Pecopteris unita
• †Petalodus
• †Petrolacosaurus – type locality for genus
  • †Petrolacosaurus kansensis – type locality for species
• †Phillipsia – tentative report
• 

  Fossilized shell of the Silurian-Early Triassic sea snail Platyceras
  †Platyceras
• †Platysomus
• Pleurotomaria
• †Samaropsis
• †Sandalodus – or unidentified comparable form
• †Sigillaria
  • †Sigillaria brardii
• †Sphenophyllum
  • †Sphenophyllum oblongifolium
  • †Sphenophyllum stoukenbergi – or unidentified comparable form
  • †Sphenophyllum thonii – or unidentified comparable form
• †Sphenopteris
• 

  Restoration of the Carboniferous reptile Spinoaequalis
  †Spinoaequalis – type locality for genus
• †Spirifer
  • †Spirifer rockymontanus – tentative report
• Spirorbis
• †Stemmatodus
• †Streptognathodus
  • †Streptognathodus zethus
• †Syringopora
• †Tetrataxis
• †Therates – type locality for genus
• †Treptichnus
• †Undichna
  • †Undichna britannica
  • †Undichna simplicitas
• †Urba – type locality for genus
• 

  Fossilized foliage of the Carboniferous-Permian conifer Walchia
  †Walchia
• †Wilkingia
• †Worthenia
• †Xyrospondylus
• Yoldia

Mesozoic

Selected Mesozoic taxa of Kansas

• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Acanthoscaphites
  †Acanthoscaphites – tentative report
  • †Acanthoscaphites reesidei
• †Alzadasaurus – type locality for genus
• †Ampullina
• †Anomia
• †Apateodus
• †Apatornis
  • †Apatornis celer – type locality for species
• †Apsopelix
  • †Apsopelix anglicus
• Aralia
• Arundo
• †Asplenium
• †Aviculopecten
  • †Aviculopecten occidentalis
• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites
  †Baculites
  • †Baculites clinolobatus
  • †Baculites compressus
  • †Baculites grandis
  • †Baculites ovatus
  • †Baculites pseudovatus – type locality for species
• †Bananogmius
• †Baptornis – type locality for genus
  • †Baptornis advenus – type locality for species
• Botula
  • †Botula carolinensis
• 

  Life restoration of the Late Cretaceous plesiosaur Brachauchenius hunting a hesperornithiform bird
  †Brachauchenius – type locality for genus
  • †Brachauchenius lucasi – type locality for species
• Brachidontes
• Cadulus
• †Calycoceras
• Carcharias
• Cardita
• †Cassiope
• †Ceratophyllum
• Chiloscyllium
• †Chondrites
• †Cimolichthys
  • †Cimolichthys nepaholica
• Cladophlebis
• †Claosaurus
  • †Claosaurus agilis – type locality for species
• 

  Life restoration of the Late Cretaceous mosasaurid Clidastes
  †Clidastes
  • †Clidastes liodontus
  • †Clidastes velox
• Cliona
• †Collignoniceras
  • †Collignoniceras woollgari
• †Coniasaurus
• Corbula
• Crassostrea
• †Cretolamna
  • †Cretolamna appendiculata
• 

  Restoration of the Late Cretaceous shark Cretoxyrhina, or the Ginsu shark
  †Cretoxyrhina
  • †Cretoxyrhina mantelli
• Ctenochelys
• Cucullaea
• †Cycadeoidea
• †Dakotasuchus – type locality for genus
  • †Dakotasuchus kingi – type locality for species
• †Dawndraco – type locality for genus
  • †Dawndraco kanzai – type locality for species
• †Desmatochelys
• †Discoscaphites
• †Dolichorhynchops – type locality for genus
  • †Dolichorhynchops osborni – type locality for species
• †Durania
• †Ectenosaurus
  • †Ectenosaurus clidastoides
• 

  Life restoration of the Late Cretaceous plesiosaur Elasmosaurus with an anachronistic human to scale
  †Elasmosaurus – type locality for genus
  • †Elasmosaurus nobilis – type locality for species
  • †Elasmosaurus platyurus – type locality for species
  • †Elasmosaurus sternbergi – type locality for species
• †Enchodus
  • †Enchodus gladiolus
  • †Enchodus petrosus
• †Euspira
• †Fagus
• †Gegania
• †Gervillia
  • †Gervillia mudgeana
  • †Gervillia mudgenana
• 

  Restoration of the Late Cretaceous bony fish Gillicus
  †Gillicus
  • †Gillicus arcuatus
• Gleichenia
• †Globidens
• †Gryphaea
  • †Gryphaea corrugata
  • †Gryphaea hilli
  • †Gryphaea mucronata
  • †Gryphaea navia
• †Halisaurus
  • †Halisaurus sternbergi – type locality for species
• 

  Life restoration of the Late Cretaceous toothed bird Hesperornis
  †Hesperornis – type locality for genus
  • †Hesperornis crassipes – type locality for species
  • †Hesperornis gracilis – type locality for species
  • †Hesperornis regalis – type locality for species
• †Heteroceras
• †Hierosaurus – type locality for genus
• †Hoploscaphites
  • †Hoploscaphites nicolletii
• †Iaceornis
  • †Iaceornis marshi – type locality for species
• †Ichthyornis – type locality for genus
  • †Ichthyornis dispar – type locality for species
• 

  Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size
  †Inoceramus
  • †Inoceramus cuvieri
  • †Inoceramus ginterensis
  • †Inoceramus tenuistriatus – tentative report
• †Ischyrhiza
  • †Ischyrhiza mira
• †Jeletzkytes
  • †Jeletzkytes nodosus
• †Leiosphaeridia
• †Leptostyrax
• †Linearis
• †Lingula
• Linuparus
• Lopha
• †Magnoavipes
• Marsilea
• †Mathilda
• 

  Fossilized skull of the Late Cretaceous plesiosaur Megacephalosaurus
  †Megacephalosaurus – type locality for genus
  • †Megacephalosaurus eulerti – type locality for species
• Membranipora
• †Modiolus
• †Niobrarasaurus
  • †Niobrarasaurus coleii – type locality for species
• †Niobrarateuthis
  • †Niobrarateuthis bonneri – type locality for species
  • †Niobrarateuthis walkeri – type locality for species
• Nucula
• 

  Restoration of the Late Cretaceous pterosaur Nyctosaurus
  †Nyctosaurus
  • †Nyctosaurus bonneri – type locality for species
  • †Nyctosaurus gracilis – type locality for species
  • †Nyctosaurus nanus – type locality for species
• †Ogmodirus – type locality for genus
• Ostrea
• †Pachyrhizodus
  • †Pachyrhizodus caninus – or unidentified comparable form
  • †Pachyrhizodus minimus
• †Parahesperornis – type locality for genus
  • †Parahesperornis alexi – type locality for species
• †Pecten
• Pholadomya
• Pinus
• †Placenticeras
  • †Placenticeras meeki
• Platanus
• 

  Restoration of the Late Cretaceous mosasaur Platecarpus
  †Platecarpus
  • †Platecarpus planifrons – type locality for species
  • †Platecarpus tympaniticus
• †Platyceramus
  • †Platyceramus platinus
• †Platypterygius – or unidentified comparable form
• †Plesiochelys
• †Plesiosaurus
• Plicatula
• 

  Life restoration of the Late Cretaceous polycotylid plesiosaur Polycotylus giving birth
  †Polycotylus – type locality for genus
  • †Polycotylus latipinnis – type locality for species
• †Prisca – tentative report
• †Protocardia
• †Protosphyraena
  • †Protosphyraena tenuis
• †Protostega
• †Pseudoperna
  • †Pseudoperna congesta
• 

  Life restoration of the Late Cretaceous pterosaur Pteranodon
  †Pteranodon – type locality for genus
  • †Pteranodon comptus – type locality for species
  • †Pteranodon longiceps – type locality for species
  • †Pteranodon sternbergi – type locality for species
• †Pteria
• †Pterotrigonia
• †Ptychodus
  • †Ptychodus anonymus – or unidentified comparable form
  • †Ptychodus decurrens
  • †Ptychodus mortoni
  • †Ptychodus occidentalis
  • †Ptychodus whipplei
• †Ptychotrygon
  • †Ptychotrygon triangularis
• Quercus
• †Repichnia
• Rhinobatos
  • †Rhinobatos incertus
• †Rhizocorallium
• Sassafras
• 

  Restoration of several of the Early Cretaceous-Miocene shark Scapanorhynchus
  †Scapanorhynchus
  • †Scapanorhynchus rhaphiodon
• †Scaphites
• †Scolicia
• Scyliorhinus
• †Selmasaurus
  • †Selmasaurus johnsoni – type locality for species
• †Sequoia
• Serpula
• †Silvisaurus – type locality for genus
  • †Silvisaurus condrayi – type locality for species
• Squalicorax
  • †Squalicorax curvatus
  • †Squalicorax falcatus
  • †Squalicorax kaupi
  • †Squalicorax pristodontus – or unidentified comparable form
  • †Squalicorax volgensis
• Sterculia
• 

  Animated life restoration of the Late Cretaceous plesiosaur Styxosaurus
  †Styxosaurus – type locality for genus
  • †Styxosaurus snowii – type locality for species
• Tellina
• †Terminonaris
• †Toxochelys
  • †Toxochelys latiremis
• Trachycardium
• †Tragodesmoceras
• †Trinacromerum – type locality for genus
  • †Trinacromerum bentonianum – type locality for species
• Turritella
• 

  Restoration of the Late Cretaceous mosasaur Tylosaurus
  †Tylosaurus
  • †Tylosaurus dyspelor
  • †Tylosaurus kansasensis – type locality for species
  • †Tylosaurus proriger
• †Uintacrinus
  • †Uintacrinus socialis
• †Urenchelys
• 

  Fish in a fish specimen
  †Xiphactinus
  • †Xiphactinus audax
• Yoldia

Cenozoic

Selected Cenozoic taxa of Kansas

• Acris
  • †Acris crepitans
• †Adelphailurus
• 

  Fossilized skull of the Miocene bone-crushing dog Aelurodon
  †Aelurodon
• Agkistrodon
• †Agriocharis
• †Agriotherium
• †Alforjas
• †Allogona
  • †Allogona profunda
• †Ambystoma
  • †Ambystoma maculatum
  • †Ambystoma tigrinum
• 

  Life restoration of the Miocene elephant relative Amebelodon. Margret Flinsch (1932).
  †Amebelodon
• Amia
  • †Amia calva
• †Amphimachairodus
• Anas
  • †Anas crecca
• †Aphelops
• Aplodinotus
  • †Aplodinotus grunniens – or unidentified comparable form
• †Arctodus
  • †Arctodus pristinus – or unidentified comparable form
  • †Arctodus simus
• †Astrohippus
• Baiomys
• †Barbourofelis
• Bassariscus
• Bison
  • †Bison antiquus – type locality for species
  • †Bison bison
  • 

    Mounted fossilized skeleton of the Pleistocene Bison latifrons, also known as the giant bison or long-horned bison
    †Bison latifrons
• Blarina
  • †Blarina brevicauda
  • †Blarina carolinensis
• †Borophagus
  • †Borophagus diversidens
  • †Borophagus hilli
  • †Borophagus pugnator
  • †Borophagus secundus – type locality for species
• Botaurus
• Bufo
  • †Bufo cognatus
  • †Bufo hemiophrys
  • †Bufo marinus
  • †Bufo woodhousei
• †Calippus
• 

  Life restoration of the Pliocene-Holocene camel Camelops
  †Camelops
• Candona
• Canis
  • †Canis armbrusteri
  • †Canis dirus
  • †Canis edwardii
  • †Canis ferox
  • †Canis latrans
  • †Canis lepophagus
• †Capromeryx
• †Carpocyon
• Carychium
  • †Carychium exiguum
• Castor
  • †Castor canadensis
• †Castoroides
  • †Castoroides ohioensis – or unidentified comparable form
• †Catostomus
  • †Catostomus commersoni
• Celtis
• 

  Life restoration of the Miocene-Pleistocene horned gopher Ceratogaulus. Robert Bruce Horsfall (1913).
  †Ceratogaulus
  • †Ceratogaulus hatcheri
  • †Ceratogaulus minor
• †Cervalces
  • †Cervalces scotti
• Cervus
  • †Cervus elaphus
• Chaetodipus
  • †Chaetodipus hispidus
• Chara
• †Chasmaporthetes
• Chelydra
  • 

    A living Chelydra serpentina, or common snapping turtle
    †Chelydra serpentina
• Chrysemys
  • †Chrysemys picta
• †Cionella
  • †Cionella lubrica
• Clethrionomys
  • †Clethrionomys gapperi
• Cnemidophorus
  • †Cnemidophorus sexlineatus
• Coluber
  • †Coluber constrictor
• 

  Fossilized skull of the Miocene pronghorn Cosoryx
  †Cosoryx
  • †Cosoryx furcatus
• Crotalus
  • †Crotalus viridis
• †Cryptantha
• Cryptotis
  • †Cryptotis parva
• Cynomys
  • †Cynomys gunnisoni – or unidentified comparable form
  • †Cynomys ludovicianus
• Deroceras
• Diadophis
  • †Diadophis punctatus
• 

  Mounted fossilized skeleton of the Miocene-Pliocene horse Dinohippus
  †Dinohippus
• Dipodomys
  • †Dipodomys ordii – or unidentified comparable form
• †Dipoides
• Discus
• Egretta
• Elaphe – type locality for genus
  • †Elaphe obsoleta
  • †Elaphe vulpina
• Emydoidea
• †Epicyon
  • †Epicyon haydeni
• Equus
  • †Equus conversidens
  • †Equus francisci
  • †Equus giganteus – or unidentified comparable form
  • †Equus niobrarensis
  • †Equus scotti
  • 

    Fossilized skeleton of the Pliocene-Pleistocene horse Equus simplicidens, also known as the Hagerman horse or American zebra
    †Equus simplicidens
• †Eucastor
• †Euconulus
  • †Euconulus fulvus
• †Eucyon
  • †Eucyon davisi
• Eumeces
  • †Eumeces fasciatus
  • †Eumeces obsoletus
  • †Eumeces septentrionalis
• Felis
• Ferrissia
• †Fundulus
• Gastrocopta
  • †Gastrocopta armifera
• Geochelone
• Geomys
  • †Geomys bursarius
• Gerrhonotus
• †Gigantocamelus
• †Gnathabelodon
• 

  Mounted fossilized skeleton of the Miocene-Pleistocene elephant relative Gomphotherium
  †Gomphotherium
• Gopherus
• Graptemys
  • †Graptemys geographica
• Grus
  • †Grus americana
• Gyraulus
  • †Gyraulus parvus
• Hawaiia
  • †Hawaiia minuscula
• Helicodiscus
  • †Helicodiscus parallelus
• Helisoma
  • †Helisoma anceps
  • †Helisoma trivolvis
• 

  Fossilized lower jaw of the Miocene-Pleistocene llama relative Hemiauchenia
  †Hemiauchenia
  • †Hemiauchenia macrocephala
• †Hesperotestudo
• Heterodon
  • †Heterodon nasicus
  • †Heterodon platyrhinos
• †Hipparion
• †Hippotherium
• Holbrookia
  • †Holbrookia maculata
• 

  Life restoration of the Pleistocene armadillo relative Holmesina with a human to scale
  †Holmesina
• Homo
  • †Homo sapiens
• †Homotherium
  • †Homotherium serum
• Hyla
  • †Hyla cinerea – or unidentified comparable form
  • †Hyla gratiosa – or unidentified comparable form
  • †Hyla squirella – or unidentified comparable form
  • †Hyla versicolor
• 

  Life restoration of the Miocene horse Hypohippus. Heinrich Harder (1920).
  †Hypohippus
• †Hypolagus
• Ictalurus
  • †Ictalurus melas
  • †Ictalurus punctatus
• †Ictiobus
• †Ischyrocyon – tentative report
• Kinosternon
  • †Kinosternon flavescens
  • †Kinosternon subrubrum
• 

  A living Lampropeltis getula, or eastern kingsnake
  Lampropeltis
  • †Lampropeltis calligaster
  • †Lampropeltis getulus
• Lasiurus
  • †Lasiurus cinereus
• Lepisosteus
  • †Lepisosteus osseus
  • †Lepisosteus platostomus – tentative report
• Lepomis
  • †Lepomis cyanellus
  • †Lepomis humilis – or unidentified comparable form
• 

  Illustration of a fossilized skull of the Oligocene-Miocene dog Leptocyon
  †Leptocyon
• Lepus
  • †Lepus californicus – or unidentified comparable form
• †Longirostromeryx
• Lontra
  • †Lontra canadensis
• Lymnaea
• Lynx
• †Machairodus
• Macrochelys
  • †Macrochelys temminckii
• †Mammut
  • †Mammut americanum
• †Mammuthus
  • 

    Life restoration of a herd of Mammuthus columbi, or Columbian mammoths. The extent of the fur depicted is hypothetical. Charles R. Knight (1909).
    †Mammuthus columbi
• Martes
• †Megalonyx
  • †Megalonyx jeffersonii
  • †Megalonyx leptostomus
• †Megantereon
• †Megatylopus
• †Menetus
• Mephitis
  • †Mephitis mephitis – tentative report
• †Merychyus
• Micropterus
  • †Micropterus punctulatus – or unidentified comparable form
• Microtus
  • †Microtus ochrogaster
  • †Microtus pennsylvanicus
• †Minytrema – tentative report
• Musculium
  • †Musculium transversum
• Mustela
  • †Mustela richardsonii – or unidentified comparable form
• †Mylagaulus
• 

  Fossilized skeleton of the Pliocene-Holocene peccary Mylohyus
  †Mylohyus
  • †Mylohyus fossilis
• Myotis
• †Nannippus
• †Nassella
• Neofiber
• Neogale
  • †Neogale frenata – or unidentified comparable form
  • †Neogale vison
• †Neohipparion
• Neotoma
  • †Neotoma floridana – or unidentified comparable form
  • †Neotoma micropus
• Nerodia
  • †Nerodia sipedon
• Nesovitrea
• †Nimravides
• 

  Life restoration of the Pleistocene ground sloth Nothrotheriops
  †Nothrotheriops
• Notiosorex
  • †Notiosorex crawfordi
• †Notropis – tentative report
• Odocoileus
• Ondatra
  • †Ondatra zibethicus
• Onychomys
  • †Onychomys leucogaster – or unidentified comparable form
• Ophisaurus
  • †Ophisaurus attenuatus
• Ortalis
• Oryzomys
  • †Oryzomys palustris
• †Panicum
  • †Panicum elegans
• Panthera
  • †Panthera leo
• 

  Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
  †Paramylodon
  • †Paramylodon harlani
• †Pediomeryx
• †Peraceras
• Perca
  • †Perca flavescens
• Perognathus
• Peromyscus
• Phenacomys
  • †Phenacomys intermedius – or unidentified comparable form
• Phrynosoma
  • †Phrynosoma cornutum
• Physa
• Pisidium
• Pituophis
  • †Pituophis catenifer
  • †Pituophis melanoleucus
• 

  Mounted fossilized skeleton of the Miocene elephant relative Platybelodon
  †Platybelodon
• †Platygonus
  • †Platygonus compressus – or unidentified comparable form
• Plegadis – or unidentified comparable form
• †Pleiolama
• †Plesiogulo
• †Pliohippus
• †Pomoxis
• †Potamocypris
• †Pratifelis
  • †Pratifelis martini – type locality for species
• †Procamelus
• †Procastoroides
• Procyon
  • †Procyon lotor
• 

  Fossilized skeleton of the Miocene horse Protohippus
  †Protohippus
• †Protolabis
• Pseudacris
  • †Pseudacris triseriata
• Pseudemys
• †Pseudhipparion
• Puma
  • †Puma concolor
• Pupilla
• Pupoides
• 

  Life restoration of the Miocene-Pliocene pronghorn Ramoceros and Cosoryx. Robert Bruce Horsfall (1913).
  †Ramoceros
• †Rana
  • †Rana areolata – or unidentified comparable form
  • †Rana catesbeiana
  • †Rana pipiens
• †Rana areolata – or unidentified comparable form
  • †Rana catesbeiana
  • †Rana pipiens
• †Regina
• Reithrodontomys
  • †Reithrodontomys humulis
  • †Reithrodontomys megalotis
  • †Reithrodontomys montanus – or unidentified comparable form
• Rhinocheilus – tentative report
  • †Rhinocheilus lecontei
• 

  Restoration of the Miocene-Pliocene elephant relative Rhynchotherium
  †Rhynchotherium
• †Satherium
  • †Satherium piscinarium
• Scalopus
  • †Scalopus aquaticus
• Scaphiopus
• Sceloporus
  • †Sceloporus undulatus
• †Semotilus
  • †Semotilus atromaculatus – or unidentified comparable form
• Sigmodon
• Sistrurus
  • †Sistrurus catenatus
• 

  Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
  †Smilodon
• †Soergelia
  • †Soergelia mayfieldi – or unidentified comparable form
• Sorex
  • †Sorex arcticus
  • †Sorex cinereus
  • †Sorex palustris
• Spea
  • †Spea bombifrons
• Spermophilus
  • †Spermophilus franklinii – or unidentified comparable form
  • †Spermophilus richardsonii
  • †Spermophilus tridecemlineatus
• Sphaerium
• Spilogale
  • †Spilogale putorius
• Stagnicola
• 

  Mounted fossilized skeleton of the Pliocene-Pleistocene elephant relative Stegomastodon
  †Stegomastodon
  • †Stegomastodon mirificus
• †Stenotrema
• Sternotherus
  • †Sternotherus odoratus
• Storeria
  • †Storeria dekayi – or unidentified comparable form
• Succinea
  • †Succinea ovalis
• Sylvilagus
  • †Sylvilagus floridanus
• Synaptomys
• Tapirus
  • †Tapirus veroensis
• Taxidea
  • †Taxidea taxus
• 

  Mounted fossilized skeleton of the Miocene-Pliocene rhinoceros Teleoceras
  †Teleoceras
• Terrapene
  • †Terrapene carolina
• Thamnophis
  • †Thamnophis proximus
  • †Thamnophis radix
  • †Thamnophis saurita – or unidentified comparable form
  • †Thamnophis sirtalis
• Thomomys
  • †Thomomys talpoides
• Trachemys
  • 

    A living Trachemys scripta, or pond slider
    †Trachemys scripta
• †Trigonictis
  • †Trigonictis macrodon
• Trionyx
• Tropidoclonion
  • †Tropidoclonion lineatum
• Tympanuchus – or unidentified comparable form
• Urocyon
  • †Urocyon cinereoargenteus
  • †Urocyon progressus
• †Ustatochoerus
• Vallonia
  • †Vallonia gracilicosta
  • †Vallonia pulchella
• Valvata
  • †Valvata tricarinata
• Vertigo
  • †Vertigo ovata
• Vulpes
  • 

    A living Vulpes velox, or swift fox
    †Vulpes velox
• Zapus
  • †Zapus hudsonius
• Zonitoides
  • †Zonitoides arboreus
  • †Zonitoides nitidus