List of the prehistoric life of Nebraska

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

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

Paleozoic

 * †Achistrum
 * †Acroplous
 * †Acroplous vorax
 * †Adacrinus
 * †Adacrinus edema – type locality for species
 * †Aesiocrinus
 * †Aesiocrinus detrusus
 * †Agassizodus
 * †Agassizodus variabilis
 * †Aglaocrinus
 * †Aglaocrinus compactus
 * †Allosocrinus
 * †Allosocrinus bronaughi
 * †Ameura
 * †Ameura missouriensis
 * Ammodiscus
 * †Amphiscapha
 * †Amphiscapha muricata
 * †Amphissites
 * † Ananias
 * †Ananias marcouiana – type locality for species
 * †Anthracospirifer
 * †Apographiocrinus
 * †Apographiocrinus platybasis
 * †Apographiocrinus typicalis
 * †Atrypa
 * †Aviculopinna
 * †Barbclabornia
 * †Barbclabornia luedersensis
 * †Bathronocrinus
 * †Bathronocrinus wolfriverensis
 * Belantsea montana.JPG †[[Belantsea]]
 * †Belantsea occidentalis
 * †Bobbodus – type locality for genus
 * †Bobbodus schaefferi – type locality for species
 * †Chonetes
 * †Chonetinella
 * †Cibolocrinus
 * †Cladodus – type locality for genus
 * †Cladodus knightianus – type locality for species
 * †Composita
 * †Composita subtilita
 * †Concavicaris
 * †Concavicaris sinuata – or unidentified comparable form
 * †Contocrinus
 * †Contocrinus stantonensis
 * †Cooleyella
 * †Coryellites
 * †Costistricklandia
 * †Costistricklandia castellana
 * †Crurithyris
 * †Crurithyris expansa
 * Ctenacanthus major Agassiz.png †[[Ctenacanthus]]
 * †Ctenacanthus amblyxiphias
 * †Cymatospira
 * †Cymatospira montfortianus
 * †Delocrinus
 * †Delocrinus admirensis
 * †Delocrinus vastus
 * †Delocrinus vulgatus
 * †Deltodus
 * †Derbyia
 * †Derbyia crassa
 * †Dibunophyllum
 * †Ditomopyge
 * †Ditomopyge scitula
 * †Ditomopyge whitei
 * †Elibatocrinus
 * †Endothyra
 * †Enteletes
 * †Enteletes hemiplicata – or unidentified comparable form
 * Eocaudina
 * †Erisocrinus
 * †Erisocrinus longwelli
 * †Erisocrinus typus
 * †Euphemites
 * †Euphemites vittatus
 * †Exocrinus
 * †Exocrinus multirami
 * †Exoriocrinus
 * Tabcoral.jpg †[[Favosites]]
 * †Fissodus
 * †Fissodus inaequalis
 * †Gilliodus
 * †Gilliodus peyeri
 * †Glabrocingulum
 * †Glabrocingulum grayvillense
 * †Glaukosocrinus
 * †Glaukosocrinus berryi – type locality for species
 * Glikmanius1DB.jpg †[[Glikmanius]]
 * †Glikmanius myachkovensis
 * †Glikmanius occidentalis
 * †Gorgonophontes
 * †Gorgonophontes peleron – type locality for species
 * †Graffhamicrinus
 * †Graffhamicrinus boellstorffi – type locality for species
 * †Graffhamicrinus magnijkus
 * †Graffhamicrinus subcoronatus
 * †Graphiocrinus
 * †Graphiocrinus scopulus – or unidentified comparable form
 * †Halogetocrinus
 * †Halogetocrinus boellstorffae – type locality for species
 * HalysitesSilurian.jpg †[[Halysites]]
 * †Helodus
 * †Helodus rugosus
 * †Heslerodus
 * †Heslerodus divergens
 * †Hollinella
 * †Holmsella
 * †Hustedia
 * †Hustedia mormoni
 * †Hypselentoma
 * †Hypselentoma inornata – type locality for species
 * †Hypselentoma perhumerosa
 * †Hystriculina
 * †Hystriculina wabashensis
 * †Ianthinopsis
 * †Ianthinopsis pulchellus
 * †Iniopera
 * †Iniopera richardsoni
 * Iniopteryxrushlaui.JPG †[[Iniopteryx]] – type locality for genus
 * †Iniopteryx rushlau – type locality for species
 * †Iniopteryx rushlaui
 * †Iniopteryx tedwhitei – type locality for species
 * †Inioxyele – type locality for genus
 * †Inioxyele whitei – type locality for species
 * †Isorthis
 * †Janassa
 * †Janassa maxima – type locality for species
 * †Janassa unguicula – type locality for species
 * †Juresania
 * †Kallimorphocrinus
 * †Linoproductus
 * †Lissochonetes
 * †Lissochonetes geronticus
 * †Lophophyllidium
 * Macrocypris
 * Metacoceras discoideum 01.jpg †[[Metacoceras]]
 * †Microcaracrinus
 * †Microcaracrinus twenhofeli
 * †Monongahela
 * †Moreyella
 * †Mycterops
 * †Mycterops whitei
 * †Nebraskacrinus
 * †Nebraskacrinus tourteloti
 * †Neochonetes
 * †Neochonetes granulifer
 * †Neospirifer
 * †Neospirifer dunbari
 * †Nodosinella – tentative report
 * Orthacanthus BW.jpg †[[Orthacanthus]]
 * †Orthacanthus compressus
 * †Orthonema
 * †Orthonema nebrascense – type locality for species
 * †Orthonema subtaeniatum – type locality for species
 * †Ozarkodina
 * †Paleochiridota
 * †Paramphicrinus
 * †Parethelocrinus
 * †Parethelocrinus variabilis
 * †Parulocrinus
 * †Parulocrinus blairi
 * Peachocaris strongi.jpg †[[Peachocaris]]
 * †Peachocaris acanthouraea
 * †Pentameroides
 * †Pentameroides corrugatus
 * †Peripristis
 * †Peripristis semicircularis
 * †Persephonichthys – type locality for genus
 * †Persephonichthys chthonica – type locality for species
 * †Petalocrinus
 * †Petalodus
 * †Petalodus alleghaniensis
 * †Petalodus arcuatus – type locality for species
 * †Petalodus destructor
 * †Pharkidonotus
 * †Pharkidonotus percarinatus – type locality for species
 * †Phoebodus
 * †Phoebodus knightianus – type locality for species
 * †Plagioglypta
 * †Plagioglypta meekiana – type locality for species
 * PlatycerasLoganOhio.jpg †[[Platyceras]]
 * †Platyxystrodus – tentative report
 * †Platyxystrodus occidentalis – type locality for species
 * †Plaxocrinus
 * †Plaxocrinus crassidiscus
 * Pleurotomaria
 * †Pleurotomaria haydeniana
 * †Plummericrinus
 * †Polusocrinus
 * †Polusocrinus rosa
 * †Polypora
 * †Porpites
 * †Promexyele
 * †Promexyele bairdi – type locality for species
 * †Protocaudina
 * Psammosphaera
 * †Ptylopora
 * †Punctospirifer
 * †Punctospirifer kentuckensis
 * †Reticulatia
 * †Reticulatia huecoensis
 * †Retispira
 * †Retispira marcouianus – type locality for species
 * †Rhipidomella
 * †Rhipidomella carbonaria
 * †Rhombopora
 * †Romerodus – type locality for genus
 * †Romerodus orodontus – type locality for species
 * †Royalella
 * †Royalella swallowiana – type locality for species
 * †Sciadiocrinus
 * †Sciadiocrinus humilis
 * †Shumardella
 * †Sibyrhynchus
 * †Sibyrhynchus denisoni
 * †Stearoceras
 * †Stearoceras sublaeve – type locality for species
 * †Stellarocrinus
 * †Stellarocrinus stillativus
 * Steth pair1 cropped.jpg †[[Stethacanthus]]
 * †Stethacanthus altonensis
 * †Streblodus
 * †Streblodus angustus – type locality for species
 * †Streptognathodus
 * †Synarmocrinus
 * †Synarmocrinus iatani
 * †Syringopora
 * †Tainoceras
 * †Tainoceras nebrascense
 * †Terpnocrinus
 * †Tetravirga
 * †Triceracrinus
 * †Ulocrinus
 * †Vertigocrinus
 * †Vertigocrinus parilis
 * †Wellerella
 * †Wellerella cooperi – or unidentified comparable form
 * †Wellerella delicatula – or unidentified comparable form
 * †Wellergyi
 * †Wellergyi subdecussatus – type locality for species

Mesozoic

 * †Acanthichthys – type locality for genus
 * †Acanthichthys major – type locality for species
 * †Acritodromum – type locality for genus
 * †Acritodromum ellipticum – type locality for species
 * †Anisodromum – type locality for genus
 * †Anisodromum wolfei – type locality for species
 * †Arcellites
 * †Arcellites disciformis
 * †Citrophyllum
 * †Citrophyllum doylei – type locality for species
 * Gasteropods - Ammonites - Collignoniceras woolgari.JPG †[[Collignoniceras]]
 * †Collignoniceras percarinatum
 * †Collignoniceras praecox
 * †Collignoniceras vermilionense
 * †Crassidenticulum
 * †Crassidenticulum decurrens
 * †Densinervum – type locality for genus
 * †Densinervum kaulii – type locality for species
 * Dicotylophyllum
 * †Dicotylophyllum aliquantuliserratum – type locality for species
 * †Dicotylophyllum angularis – type locality for species
 * †Dicotylophyllum expansolobum – type locality for species
 * †Dicotylophyllum myrtophylloides – type locality for species
 * †Dicotylophyllum rosafluviatilis – type locality for species
 * †Didromophyllum – type locality for genus
 * †Didromophyllum basingerii – type locality for species
 * †Didymoceras
 * †Didymoceras cheyennense
 * †Inoceramus
 * †Inoceramus apicalis
 * †Inoceramus cuvieri
 * †Inoceramus fragilis
 * †Landonia – type locality for genus
 * †Landonia calophylla – type locality for species
 * †Longstrethia – type locality for genus
 * †Longstrethia varidentata – type locality for species
 * †Minerisporites
 * †Minerisporites dissimilis – type locality for species
 * Mosasaurus BW.jpg †[[Mosasaurus]]
 * †Mytiloides
 * †Mytiloides labiatus
 * †Mytiloides mytiloides
 * †Pabiania – type locality for genus
 * †Pabiania variloba – type locality for species
 * †Pandemophyllum – type locality for genus
 * †Pandemophyllum attenuatum – type locality for species
 * †Pandemophyllum kvacekii – type locality for species
 * †Perotriletes
 * †Perotriletes striatus
 * †Pseudoperna
 * †Pseudoperna congesta
 * †Reynoldsiophyllum
 * †Reynoldsiophyllum nebrascense – type locality for species
 * †Rhaeboceras
 * †Rosselia – or unidentified comparable form
 * †Scaphites
 * †Scaphites patulus
 * †Skolithos – or unidentified comparable form
 * Styxocycle by johnson mortimer-dafh0ce.gif †[[Styxosaurus]] – type locality for genus
 * †Volviceramus
 * †Volviceramus involutus

Selected Cenozoic taxa of Nebraska

 * Acer
 * Acipenser
 * Acris
 * †Acris crepitans – or unidentified comparable form
 * †Acritohippus
 * †Acritohippus isonesus
 * †Aelurodon
 * Aepycamelus Alticamelus hharder.jpg †[[Aepycamelus]]
 * †Aepycamelus major
 * †Aepycamelus robustus
 * Agkistrodon
 * †Agnotocastor
 * †Agriochoerus
 * †Agriotherium
 * †Aletomeryx
 * †Alforjas
 * Alligator
 * Alnus
 * †Ambrosia
 * †Ambystoma
 * †Ambystoma maculatum
 * †Ambystoma tigrinum
 * Amebelodon fricki.jpg †[[Amebelodon]]
 * Amia
 * †Amia calva
 * Ammospermophilus
 * †Amphechinus
 * †Amphicyon
 * †Amphicyon frendens – type locality for species
 * †Amphicyon galushai – type locality for species
 * †Amphicyon ingens
 * †Amphimachairodus
 * †Anchitheriomys
 * Anchitherium - mandibles - Somosaguas cropped.jpg †[[Anchitherium]]
 * †Andrias
 * Antrozous – or unidentified comparable form
 * Apalone
 * †Apalone spinifera
 * †Aphelops
 * Aplodinotus
 * †Aplodinotus grunniens
 * Aramus
 * †Archaeocyon
 * †Archaeohippus
 * Archaeotherium.jpg †[[Archaeotherium]]
 * †Arctodus
 * †Arctodus simus
 * †Arctonasua
 * Ardea
 * Arizona
 * †Artemisia
 * †Astrohippus
 * Atractosteus
 * †Atractosteus spatula
 * Baiomys
 * Balearica
 * †Barbourofelis
 * †Barbourofelis fricki
 * †Barbourofelis morrisi – type locality for species
 * †Barbourofelis whitfordi – type locality for species
 * Bassariscus
 * †Bathornis
 * †Bathornis veredus
 * †Bathygenys
 * Betula – or unidentified comparable form
 * Bison
 * Bison latifrons fossil buffalo (Pleistocene; North America) 1 (15257877377).jpg †[[Bison latifrons]]
 * Blarina
 * †Blarina brevicauda
 * †Blastomeryx
 * †Blastomeryx gemmifer – type locality for species
 * †Bootherium
 * †Bootherium bombifrons – type locality for species
 * †Borophagus
 * †Borophagus diversidens
 * †Borophagus pugnator
 * †Borophagus secundus
 * †Bothriodon
 * †Brachycrus
 * †Brachypsalis
 * †Brachyrhynchocyon
 * †Brontops
 * Bufo
 * †Bufo cognatus
 * Burhinus
 * Buteo
 * †Calippus
 * Camelops hesternus Sergiodlarosa.jpg †[[Camelops]]
 * †Camelops hesternus
 * Canis
 * †Canis dirus
 * †Canis edwardii
 * †Canis ferox
 * †Canis latrans
 * †Canis lepophagus
 * †Capromeryx
 * †Carpocyon
 * Carya
 * Castor
 * †Castor californicus – or unidentified comparable form
 * †Castoroides
 * Cedrela
 * Celtis
 * †Cephalogale
 * Nsthornedgopher-hlmwh-rbh13.jpg †[[Ceratogaulus]]
 * †Ceratogaulus anecdotus
 * †Ceratogaulus hatcheri
 * †Ceratogaulus rhinocerus
 * †Cervalces
 * Chaetodipus
 * †Chaetodipus hispidus
 * †Chamaecyparis
 * Charina
 * Chelydra
 * †Chelydra serpentina
 * †Chelydrops
 * †Chelydrops stricta – type locality for species
 * Chrysemys
 * †Chrysemys picta
 * Cladrastis-kentukea-00.JPG [[Cladrastis]]
 * Clethrionomys
 * †Clethrionomys gapperi – or unidentified comparable form
 * Cnemidophorus
 * †Cnemidophorus sexlineatus
 * Cocculus
 * †Colodon
 * Coluber
 * †Coluber constrictor
 * †Conuropsis
 * †Cordia
 * †Cormocyon
 * †Cormohipparion
 * †Cosoryx
 * †Cosoryx furcatus
 * Cranioceras unicornis life restoration.jpg Cranioceras, a relative of modern deer, with anachronistic human to scale]] †Cranioceras
 * Crataegus
 * Crotalus
 * †Crotalus horridus
 * Cryptotis
 * †Cynarctoides
 * †Cynarctoides acridens
 * †Cynarctoides emryi – type locality for species
 * †Cynarctoides roii
 * †Cynarctus
 * †Cynelos
 * †Cynodesmus
 * Cynomys
 * †Daphoenictis
 * †Daphoenodon
 * Daphoenus vetus restoration.jpg †[[Daphoenus]] – type locality for genus
 * Dasypus
 * †Dasypus bellus
 * †Desmatippus
 * †Desmatochoerus
 * †Desmocyon
 * †Diceratherium
 * Dicrostonyx
 * †Dicrostonyx torquatus
 * ExtmDinictis1921-029-11.jpg †[[Dinictis]]
 * †Dinohippus
 * †Dinohyus
 * †Dinohyus hollandi – type locality for species
 * †Diospyros
 * Dipodomys
 * †Dipoides
 * †Diprionomys
 * †Domnina
 * †Dromomeryx
 * †Dromomeryx borealis – type locality for species
 * †Ectopocynus
 * †Ekgmowechashala
 * †Ekgmowechashala philotau
 * Elaphe
 * †Elaphe guttata
 * †Elaphe obsoleta
 * †Elaphe vulpina
 * Bothriodon brachyrhynchus.jpg †[[Elomeryx]] – tentative report
 * Emydoidea
 * †Emydoidea blandingii
 * †Enhydrocyon
 * †Epicyon
 * †Epicyon haydeni
 * Equus
 * †Equus conversidens – or unidentified comparable form
 * †Equus francisci
 * †Equus simplicidens
 * Erethizon
 * †Erethizon dorsatum
 * Esox
 * Eubelodon cropped.jpg †[[Eubelodon]]
 * †Eucastor
 * †Eucyon
 * †Eucyon davisi
 * Eumeces
 * †Euoplocyon
 * Felis
 * †Floridatragulus
 * †Fraxinus
 * †Gaillardia
 * Geochelone
 * Geomys
 * †Geomys bursarius
 * Geranoaetus
 * Gerrhonotus
 * †Gigantocamelus
 * Glyptemys
 * Gomphotherium productum.jpg †[[Gomphotherium]]
 * Gopherus
 * Graptemys
 * Grus
 * †Hayoceros
 * †Helodermoides
 * †Helodermoides tuberculatus
 * †Hemiauchenia
 * †Hemiauchenia macrocephala
 * †Herpetotherium
 * †Herpetotherium fugax
 * Cynodictis.jpg †[[Hesperocyon]]
 * †Hesperotestudo
 * Heterodon
 * †Heterodon nasicus
 * †Heterodon platyrhinos
 * †Heteromeryx
 * †Hipparion
 * †Hipparion forcei
 * †Hippotherium
 * Holbrookia – tentative report
 * Homotherium serum.jpg †[[Homotherium]]
 * †Homotherium crusafonti
 * †Hoplophoneus
 * †Hyaenodon
 * †Hyaenodon crucians
 * Hyla
 * †Hyla gratiosa – or unidentified comparable form
 * †Hyla squirella – or unidentified comparable form
 * †Hyla versicolor – or unidentified comparable form
 * †Hypertragulus
 * †Hypisodus
 * †Hypohippus
 * †Hypolagus
 * †Hypsiops
 * †Hyracodon
 * Ictalurus
 * †Ictalurus punctatus – or unidentified comparable form
 * Ilex
 * Indarctos atticus.jpg †[[Indarctos]]
 * †Ischyrocyon
 * †Ischyromys
 * Juglans
 * †Kalobatippus
 * Kinosternon
 * †Kinosternon flavescens
 * †Lambdoceras
 * Lampropeltis
 * †Lampropeltis calligaster
 * †Lampropeltis getulus
 * †Lampropeltis triangulum
 * Lasiurus
 * Leiocephalus
 * Lepisosteus
 * Lepomis
 * †Lepomis microlophus
 * Leptauchenia by Apokryltaros cropped.png †[[Leptauchenia]]
 * †Leptocyon
 * †Leptomeryx
 * Lepus
 * †Lepus californicus – or unidentified comparable form
 * Lichanura
 * Liquidambar
 * †Longirostromeryx
 * Lontra
 * Lycopodium
 * †Machairodus
 * Macrochelys
 * †Macrochelys temminckii
 * Mahonia
 * †Mammacyon
 * †Mammut
 * †Mammut matthewi
 * †Mammuthus
 * Columbian mammoth cropped.png †[[Mammuthus columbi]]
 * Martes
 * Masticophis
 * †Masticophis flagellum
 * †Mediochoerus
 * †Megacamelus
 * †Megahippus
 * †Megalictis
 * †Megalictis ferox
 * †Megalonyx
 * †Megalonyx leptostomus
 * †Megantereon – tentative report
 * †Megatylopus
 * †Meliosma
 * †Menoceras
 * Mephitis
 * Striped Skunk (Mephitis mephitis) DSC 0030 cropped.jpg †[[Mephitis mephitis]]
 * †Merychippus
 * †Merychyus
 * †Merycochoerus
 * †Merycodus
 * †Merycoides
 * †Merycoidodon
 * †Mesocyon – report made of unidentified related form or using admittedly obsolete nomenclature
 * †Mesohippus
 * †Mesoreodon
 * Metailurus (Metailurus sp) Asenovgrad2.jpg †[[Metailurus]]
 * †Metalopex
 * †Metatomarctus
 * †Michenia
 * Micropterus
 * †Microtomarctus
 * Microtus
 * †Microtus ochrogaster
 * †Microtus pennsylvanicus
 * Micrurus
 * †Migmacastor – type locality for genus
 * †Migmacastor procumbodens – type locality for species
 * †Miniochoerus
 * †Miohippus
 * †Miotapirus
 * †Miotapirus harrisonensis
 * †Miotylopus
 * †Monosaulax
 * †Moropus
 * Mustela
 * †Mustela frenata
 * †Mustela nigripes
 * †Mustela vison
 * Mycteria
 * †Mylagaulus
 * †Mylohyus
 * Myotis
 * †Nannippus
 * †Nanotragulus
 * Natrix – or unidentified comparable form
 * †Neohipparion
 * Neophrontops americanus fossil cropped.jpg [[Neophrontops]]
 * Neotamias
 * Neotoma
 * Nerodia
 * †Nerodia rhombifera
 * †Nerodia sipedon
 * †Nexuotapirus
 * †Nimravides
 * †Nimravides pedionomus – type locality for species
 * †Nordenosaurus
 * †Nototamias
 * †Nyssa
 * Ochotona
 * †Ochotona spanglei – or unidentified comparable form
 * White-tailed deer.jpg [[Odocoileus]]
 * †Odocoileus virginianus
 * †Oligobunis
 * Ondatra
 * †Ondatra zibethicus
 * Onychomys
 * †Onychomys leucogaster – or unidentified comparable form
 * Opheodrys – or unidentified comparable form
 * Ophisaurus
 * †Ophisaurus ventralis
 * Ortalis
 * †Osbornodon
 * †Osbornodon iamonensis
 * †Oxetocyon
 * †Oxydactylus
 * Palaeocastor.jpg †[[Palaeocastor]]
 * †Palaeogale
 * †Palaeolagus
 * Panthera
 * †Panthera leo
 * †Paracynarctus
 * †Paradaphoenus
 * †Paraenhydrocyon
 * †Parahippus
 * †Paramylodon
 * †Paramylodon harlani
 * †Paramys
 * Parascalops – or unidentified comparable form
 * †Paratomarctus
 * †Paratylopus
 * †Parictis
 * †Paronychomys
 * †Parvitragulus – tentative report
 * †Pediolophodon
 * †Pediomeryx
 * Peltosaurus.JPG †[[Peltosaurus]]
 * †Peltosaurus granulosus
 * †Peraceras
 * Perognathus
 * Peromyscus
 * †Phasianus
 * †Phenacocoelus
 * Phenacomys
 * †Phenacomys intermedius – or unidentified comparable form
 * †Phlaocyon
 * †Phlaocyon annectens
 * †Phlaocyon mariae – type locality for species
 * †Phlaocyon minor
 * †Phlaocyon yatkolai – type locality for species
 * Phrynosoma
 * †Phrynosoma cornutum
 * Picea
 * Pinus
 * Pituophis
 * †Pituophis catenifer
 * †Pituophis melanoleucus
 * Platanus
 * WPHubeiPlatybeladon.jpg †[[Platybelodon]]
 * †Platygonus
 * †Platygonus compressus
 * †Pleiolama
 * †Plesiogulo
 * †Pliauchenia
 * †Pliocyon
 * †Pliohippus
 * †Pliometanastes
 * †Plionarctos
 * †Plithocyon
 * †Poebrotherium
 * Pogonodon platycopis.jpg †[[Pogonodon]]
 * Populus
 * †Proantilocapra
 * †Procamelus
 * †Procamelus occidentalis
 * †Procastoroides
 * †Procranioceras
 * †Promartes
 * †Promerycochoerus
 * †Proscalops
 * †Prosynthetoceras
 * †Proterix
 * Knight Protoceras.jpg †[[Protoceras]]
 * †Protohippus
 * †Protolabis
 * †Protomarctus
 * Prunus
 * †Prunus acuminata – type locality for species
 * †Psalidocyon
 * Pseudacris
 * †Pseudaelurus
 * †Pseudhipparion
 * †Pseudocyon
 * †Pseudolabis
 * †Pseudoprotoceras
 * Pterocarya
 * †Pylodictis
 * †Pylodictis olivaris
 * Quercus
 * †Quercus parvula – type locality for species
 * Merycodus osborni cropped.png †[[Ramoceros]]
 * †Ramoceros
 * †Rana
 * †Rana catesbeiana
 * †Rana clamitans
 * †Rana pipiens
 * †Rana sylvatica
 * †Regina – or unidentified comparable form
 * Reithrodontomys
 * †Repomys
 * Rhineura
 * Rhinocheilus
 * †Rhinocheilus lecontei
 * †Ribes
 * Robina9146.JPG †[[Robinia]]
 * Salix
 * Salvadora
 * †Sarcobatus – or unidentified comparable form
 * †Satherium
 * †Satherium piscinarium
 * Scalopus
 * †Scalopus aquaticus
 * Scaphiopus
 * †Scaphohippus
 * Sceloporus
 * †Sceloporus undulatus
 * Sequoia – or unidentified comparable form
 * †Serbelodon
 * †Sespia
 * Sigmodon
 * Siren
 * Sistrurus
 * †Sistrurus catenatus
 * †Skinnerhyus – type locality for genus
 * Smilodon fatalis.jpg †[[Smilodon]]
 * †Smilodon fatalis – or unidentified comparable form
 * Sorex
 * †Sorex arcticus
 * †Sorex cinereus
 * †Sorex palustris
 * Spea
 * †Spea bombifrons
 * Spermophilus
 * †Spermophilus elegans
 * †Spermophilus franklinii – or unidentified comparable form
 * †Spermophilus richardsonii
 * †Spermophilus tridecemlineatus
 * Spizaetus
 * Stegomastodon mirificus - Smithsonian.JPG †[[Stegomastodon]]
 * †Steneofiber
 * †Stenomylus
 * †Stenomylus gracilis
 * †Stenomylus hitchcocki – type locality for species
 * Sthenictis
 * †Stylemys
 * †Subdromomeryx
 * †Subdromomeryx antilopinus
 * †Subhyracodon
 * †Sunkahetanka
 * †Sunkahetanka geringensis
 * Sylvilagus
 * †Sylvilagus floridanus
 * Synaptomys
 * †Synaptomys cooperi
 * Syndyoceras BW.jpg †[[Syndyoceras]]
 * †Syndyoceras cooki – type locality for species
 * †Synthetoceras
 * †Synthetoceras tricornatus
 * Tamias
 * †Tanymykter
 * Tapirus
 * †Tapirus johnsoni – type locality for species
 * †Tapirus polkensis – or unidentified comparable form
 * Taxidea
 * †Taxidea taxus
 * Teleoceras Horsfall cropped.jpg †[[Teleoceras]]
 * †Teleoceras major – type locality for species
 * †Temnocyon
 * †Tephrocyon
 * Terrapene
 * †Terrapene ornata – type locality for species
 * †Tetrabelodon
 * Thamnophis
 * †Thamnophis proximus
 * †Thamnophis radix
 * †Thamnophis sirtalis
 * Thinobadistes cropped.jpg †[[Thinobadistes]]
 * Thomomys
 * †Ticholeptus
 * Tilia
 * †Titanotylopus
 * †Tomarctus
 * †Tomarctus brevirostris
 * †Tomarctus hippophaga – type locality for species
 * Trachemys
 * †Trigenicus
 * †Trigonias
 * †Trigonictis macrodon
 * Trionyx
 * Tropidoclonion – or unidentified comparable form
 * †Tylocephalonyx
 * Ulmus
 * Urocyon
 * †Ursavus
 * †Ustatochoerus
 * Vitis
 * Vulpes
 * †Vulpes velox
 * †Ysengrinia
 * †Yumaceras
 * Zapus
 * †Zapus hudsonius
 * †Zodiolestes
 * Mammut borsoni from Milia.jpg †[[Zygolophodon]]