This list of the Cenozoic life of Wyoming contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Wyoming and are between 66 million and 10,000 years of age.
Fagus
†Fagus antipofii
†Fagus undulata
Falco
†Ficarasites – type locality for genus
†Ficarasites stigmaticum – type locality for species
Ficus
†Ficus affinis
†Ficus artocarpoides
†Ficus asiminaefolia
†Ficus deformata
†Ficus densifolia
†Ficus haguei
†Ficus planicostata
†Ficus shastensis – tentative report
†Ficus subtruncata
†Ficus tiliaefolia – tentative report
†Ficus ungeri
†Firmianites – type locality for genus
†Firmianites aterrimus – type locality for species
†Florentiamys
†Florentiamys kinseyi – type locality for species
†Florentiamys loomisi – type locality for species
Fossilized skeleton of the Eocene bird Fluvioviridavis †Fluvioviridavis – type locality for genus
†Fluvioviridavis platyrhamphus – type locality for species
†Foekenia
†Fortuna
†Fortuna marsilioides – or unidentified comparable form
†Franimys
†Franimys ambos
†Franimys amherstensis – type locality for species
†Franimys buccatus
†Fraxinoipollenis
†Fraxinoipollenis variabilis
†Fraxinoipollenites
†Fraxinoipollenites pachyexinous
†Fraxinoipollenites variabilis
†Fraxinopollenites
†Fraxinopollenites variabilis
Illustrations of the flowers and foliage of a living Fraxinus , or ash tree, with insets further detailing its anatomy †Fraxinus
†Fraxinus eocenica
†Fraxinus eocinica
†Fraxinus wrightii
†Fulgora
†Fulgora granulosa – type locality for species
†Fulgora populata – type locality for species
†Gagadon
†Galbreathia
†Galecyon
Galerita
†Galerita marshii – type locality for species
Fossilized skeleton of the Eocene bird Gallinuloides †Gallinuloides – type locality for genus
†Gallinuloides wyomingensis – type locality for species
Gastrocopta
Gastrodonta
†Gaultia – type locality for genus
†Gaultia silvaticus – type locality for species
†Gazinius
†Gazinius amplus
†Gazinius bowni – type locality for species
†Gazinocyon
†Gelastops
†Gelastops joni – type locality for species
†Gelastops parcus
†Geranoides – type locality for genus
†Geranoides jepseni – type locality for species
†Geringophis
Gerrhonotus – or unidentified comparable form
Ginkgo
†Gleditsia – or unidentified related form
†Gleicheniidites
†Glypta
†Glypta transversalis – type locality for species
†Glyptosaurus – type locality for genus
†Glyptosaurus agmodon – type locality for species
†Glyptosaurus obtusidens – type locality for species
†Glyptosaurus rhodinos – type locality for species
†Glyptosaurus sphenodon – type locality for species
†Glyptosaurus sylvestris – type locality for species
Glyptostrobus
†Goinophis – tentative report
†Gomphochelys – type locality for genus
†Gomphochelys nanus – type locality for species
†Goniacodon
†Goniacodon levisanus – type locality for species
†Goniodontomys
†Goniodontomys disjunctus
Gopherus
†Gracilocyon
†Gracilocyon rosei
†Gracilocyon winkleri
†Grangerella
†Gregorymys
†Gregorymys formosus
†Gregorymys riggsi – type locality for species
†Grewiopsis – tentative report
†Griphomys
Grus
Gulo
†Gymnetron
†Gymnetron lecontei – type locality for species
†Gymnocladus
Gyraulus – or unidentified comparable form
Fossilized skeleton of the Eocene bat Icaronycteris †Icaronycteris – type locality for genus
†Ignacius
†Ignacius clarkforkensis – type locality for species
†Ignacius fremontensis
†Ignacius frugivorus
†Ignacius graybullianus
†Iguanavus – type locality for genus
†Iguanavus exilis – type locality for species
†Indusia
†Indusia calculosa – type locality for species
†Insulapollenites
†Insulapollenites leboensis
†Insulapollenites rugulatus
†Intyrictis
†Iridodon – type locality for genus
†Iridodon datzae – type locality for species
Mounted fossilized skeleton of the Eocene-Oligocene rodent Ischyromys †Ischyromys
†Isectolophus
†Isectolophus latidens
†Isectolophus radinskyi – type locality for species
†Isoetites
†Iulus
†Iulus telluster – type locality for species
†Jepsenella
†Jepsibaena
†Jepsibaena minor – type locality for species
†Joffrea
†Joffrea BB20 informal
†Joffrea FW50 informal
†Judithemys
†Judithemys backmani – or unidentified comparable form
†Juglandicarya
†Juglandiphyllites
†Juglandiphyllites glabra
Juglans
†Juglans crescentia
†Juglans laurifolia
†Juglans rugosa
†Juglans schimperi
Fossilized skeleton of the Eocene wading bird Juncitarsus †Juncitarsus – type locality for genus
†Juncitarsus gracillimus – type locality for species
Junco – or unidentified comparable form
†Junglandaceae
†Kalmia
†Kalobatippus
†Kalobatippus agatensis
†Kalobatippus avus
Fossilized skeleton of the Eocene bony fish Knightia †Knightia
†Knightomys
†Knightomys cremneus
†Knightomys cuspidatus
†Knightomys depressus
†Knightomys huerfanensis
†Knightomys minor
†Knightomys senior
Koelreuteria
†Koelreuteria viridifluminis
†Koniaryctes
†Koniaryctes paulus – type locality for species
†Kydia – or unidentified related form
†Namatomys
†Namatomys erythrus – type locality for species
†Namatomys lloydi
†Nannodectes
†Nannodectes gazini – type locality for species
†Nannodectes gidleyi
†Nannodectes intermedius – type locality for species
†Nannodectes simpsoni – type locality for species
†Nanodelphys
†Nanomomys
†Nanotragulus
†Nanotragulus loomisi – type locality for species
†Nanotragulus ordinatus
†Naocephalus – type locality for genus
†Naocephalus porrectus – type locality for species
†Navajovius
†Neanis
†Necrocydnus
†Necrocydnus gosiutensis – type locality for species
†Necygonus – type locality for genus
†Necygonus rotundatus – type locality for species
†Nelumbago
A living Nelumbo lotus †Nelumbo
†Neocathartes
†Neodiacodexis
†Neoliotomus
Mounted fossilized skeleton of the Miocene Neophrontops Neophrontops
†Neoplagiaulax
†Neothanes
†Neothanes testeus – type locality for species
Neotoma
†Neovulpavus
†Nexuotapirus
†Nexuotapirus marslandensis
†Niglarodon
†Niptomomys
†Niptomomys doreenae
†Niptomomys favorum – type locality for species
†Niptomomys thelmae
†Nonomys
†Nordenskioldia
†Nosodendron
†Nosodendron tritavum – type locality for species
†Notharctus
†Notogoneus
†Notomorpha – type locality for genus
†Notomorpha garmanii – type locality for species
†Notomorpha gravis – type locality for species
†Notomorpha testudinea – type locality for species
†Notoparamys – tentative report
†Notoparamys blochi – type locality for species
†Nototamias – or unidentified comparable form
†Nucifraga
Numenius
†Nyctea
†Nyctitherium
†Nyctitherium christopheri
†Nyctitherium gunnelli – type locality for species
†Nyctitherium serotinum – type locality for species
†Nyctitherium velox
†Nyssa
†Nyssa alata
†Nyssa borealis
Ochotona
Ocotea
†Ocotea coloradensis
†Ocotea FW03 informal
†Odaxosaurus
†Ogmophis
†Ogmophis microcompactus – or unidentified comparable form
†Ogmophis voorhiesi
†Oligodontosaurus – type locality for genus
†Oligodontosaurus wyomingensis – type locality for species
†Oligoryctes
†Oligoryctes altitalonidus
†Oligoryctes cameronensis
†Oligoscalops – tentative report
†Oligospermophilus
†Oligotheriomys
†Oliveremys
†Oliveremys uintaensis – type locality for species
†Omalodiscus
†Omomys
†Omomys carteri
†Omomys lloydi
Ondatra
†Onoclea
Restoration of the Eocene bat Onychonycteris †Onychonycteris – type locality for genus
†Oodectes
†Oodectes herpestoides – type locality for species
†Oodectes jepseni
Ophryastes
†Ophryastes compactus – type locality for species
†Opisthotriton
A living Oreamnos , or mountain goat Oreamnos
†Oreoconus
†Oreodontoides
†Oreodontoides oregonensis
Oreohelix
†Oreolagus
†Oreolagus colteri
†Oreolagus nebrascensis
†Oreopanax
†Ormiscus
†Ormiscus partitus – type locality for species
Mounted fossilized skeleton of the Eocene horse Orohippus †Orohippus
†Orohippus major – type locality for species
†Orohippus proteros
†Orohippus pumilus – type locality for species
†Orohippus sylvaticus
†Orthogenysuchus – type locality for genus
†Osbornodon
†Osbornodon brachypus – type locality for species
†Osmanthus
Living Osmunda ferns †Osmunda
†Osmundacidites
†Otarocyon
†Otiorhynchites
†Otiorhynchites fossilis – type locality for species
†Otiorhynchites tysoni
†Otiorhynchus
†Otiorhynchus dubius – type locality for species
†Otiorhynchus perditus – type locality for species
†Ototriton – type locality for genus
†Ourayia
†Ourayia hopsoni
†Ourayia uintensis
Ovis
†Oxyacodon
†Oxyacodon agapetillus
†Oxyacodon apiculatus
†Oxyacodon priscilla
†Oxyaena
†Oxyaena forcipata
†Oxyaena gulo
†Oxyaena intermedia
†Oxyaena lupina
†Oxyclaenus
Life restoration of a pair of the Oligocene-Miocene camel Oxydactylus . Robert Bruce Horsfall (1913). †Oxydactylus
†Oxydactylus longipes – or unidentified comparable form
†Oxydactylus lulli – type locality for species
†Oxydactylus wyomingensis
†Oxyprimus
†Oxyprimus galadrielae – type locality for species
†Oxyprimus putorius
†Quadratomus
†Quadratomus grandis
†Quadratomus grossus
†Quadratomus sundelli
†Quercinium
†Quercinium knowltoni
†Quercinium lamarense
A living Quercus , or oak tree Quercus
†Quercus consimilis – tentative report
†Quercus culveri
†Quercus cuneatus – type locality for species
†Quercus drymeja
†Quercus furcinervis
†Quercus GR522 informal
†Quercus GR575 informal
†Quercus greenlandica
†Quercus grosidentata
†Quercus hesperia
†Quercus magnifolia
†Quercus olafseni
†Quercus petros – type locality for species
†Quercus sullyi
†Quercus weedii
†Quercus yanceyi
†Quereuxia
A living Quiscalus , or grackle Quiscalus – or unidentified comparable form
Life restoration of the Miocene-Pliocene pronghorn Ramoceros and Cosoryx . Robert Bruce Horsfall (1913). †Ramoceros
†Rapamys
†Raphictis
†Reithroparamyine
†Reithroparamys
†Reithroparamys delicatissimus – type locality for species
†Reithroparamys huerfanensis
†Restes – type locality for genus
†Restes rugosus – type locality for species
†Reticuloidosporites
†Reticuloidosporites pseudomurii
†Rhamnacinium
†Rhamnus
†Rhamnus cleburni
†Rhamnus hirsuta
†Rhamnus rectinervis
Rhineura – type locality for genus
†Rhineura hatcherii – type locality for species
Rhinoclemmys – report made of unidentified related form or using admittedly obsolete nomenclature
Rhus
†Rhus mixta – tentative report
A Rhus nigricans leaf †Rhus nigricans
†Rhyssa
†Rhyssa juvenis – type locality for species
Flowers of a living Robinia †Robinia
Rosa
†Rymosia
†Rymosia strangulata – type locality for species
†Uintaceras
†Uintacyon
†Uintacyon asodes
†Uintacyon gingerichi
†Uintacyon jugulans – type locality for species
†Uintacyon massetericus
†Uintacyon rudis
†Uintanius
†Uintanius ameghini
†Uintanius rutherfurdi
†Uintasorex
Life restoration of the Eocene mammal Uintatherium †Uintatherium – type locality for genus
†Uintornis – type locality for genus
†Uintornis lucaris – type locality for species
†Uintornis marionae – type locality for species
Ulmus
†Ulmus microphylla
†Ulmus minima – tentative report
†Ulmus rhamnifolia
Unio
†Unuchinia
†Unuchinia diaphanes – type locality for species
†Unuchinia dysmathes
Ursus
†Ustatochoerus
†Utahia
†Utahia carina – type locality for species
†Utemylus
†Utemylus serior – type locality for species
†Valenia
†Valenopsalis
†Vassacyon
†Vassacyon bowni – type locality for species
†Vassacyon promicrodon
†Vauquelinia
†Vauquelinia comptonifolia
†Viburnum
†Viburnum antiquorum
†Viburnum antiquum
†Viburnum asperum
†Vinea – or unidentified comparable form
Leaves and fruit of a living Vitis , or grapevine Vitis
†Vitis olriki
†"Vitis" stantoni [5]
†Viverravus
†Viverravus acutus
†Viverravus acutus/gracilis informal
†Viverravus browni
†Viverravus gracilis – type locality for species
†Viverravus laytoni
†Viverravus lutosus
†Viverravus minutus – type locality for species
†Viverravus politus
†Viverravus rosei – type locality for species
†Viverravus sicarius
Viviparus
Mounted fossilized skeleton of the Eocene mammal Vulpavus †Vulpavus
†Vulpavus australis
†Vulpavus canavus
†Vulpavus farsonensis – type locality for species
†Vulpavus hargeri
†Vulpavus ovatus – type locality for species
†Vulpavus palustris – type locality for species
†Vulpavus profectus – type locality for species
†Vulpavus simplex
Vulpes
†Washakius
†Washakius insignis
†Washakius izetti
†Wickia
†Wickia brevirhinus – or unidentified comparable form
†Wilsoneumys
Living Woodwardia ferns †Woodwardia
†Woodwardia arctica
†Woodwardia gravida
†Woodwardia preareolata
†Worlandia
†Worlandia inusitata – type locality for species
†Wrightohyus
†Wyolestes
†Wyolestes apheles
†Wyolestes dioctes – type locality for species
†Wyomomys
†Wyomomys bridgeri – type locality for species
†Wyomylus – type locality for genus
†Wyomylus whitei – type locality for species
†Wyonycteris – type locality for genus
†Wyonycteris chalix – type locality for species
†Xanclomys
†Xenicohippus
†Xenicohippus craspedotum
†Xenicohippus grangeri
†Xenochelys
†Xenochelys bridgerensis – type locality for species
†Xenochelys formosa
†Xenochelys lostcabinensis – type locality for species
†Xenocranium
†Xestops
†Xestops gracilis – type locality for species
†Xestops lentus – type locality for species
†Xestops microdus – type locality for species
†Xestops minutus – type locality for species
†Xestops piercei – type locality for species
†Xestops savagei – type locality for species
†Xestops vagans – type locality for species
†Xestops vagrans
†Xyronomys
†Xyronomys swainae – type locality for species
†Yoderimys – type locality for genus
†Yoderimys bumpi – type locality for species
†Yoderimys stewarti
Life restoration of the Miocene bear dog Ysengrinia †Ysengrinia
†Zamia
†Zamia coloradensis
†Zamia colorodensis
†Zamia wyomingensis
†Zangerlichelys
†Zanycteris
Zelkova
†Zemiodontomys
Zenaida
†Ziamys – or unidentified comparable form
†Zingiberopsis
†Zingiberopsis isonervosa
Zizyphus
†Zodiolestes
Zonotrichia
Patrick S. Herendeen; Fabiany Herrera (2019). "Eocene fossil legume leaves referable to the extant genus Arcoa (Caesalpinioideae, Leguminosae)". International Journal of Plant Sciences . 180 (3): 220–231. doi :10.1086/701468 . S2CID 92041312 .
Paul E. Morse; Stephen G.B. Chester; Doug M. Boyer; Thierry Smith; Richard Smith; Paul Gigase; Jonathan I. Bloch (2019). "New fossils, systematics, and biogeography of the oldest known crown primate Teilhardina from the earliest Eocene of Asia, Europe, and North America". Journal of Human Evolution . 128 : 103–131. doi :10.1016/j.jhevol.2018.08.005 . PMID 30497682 . S2CID 54167483 .
Bin Bai; Yuan-Qing Wang; Jin Meng (2019). "A new late Paleocene phenacodontid 'condylarth' Lophocion from the Clark's Fork Basin of Wyoming". Historical Biology: An International Journal of Paleobiology . 33 (5): 1–8. doi :10.1080/08912963.2019.1652283 . S2CID 202017719 .
Johnson, Kirk. (2002). Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression. 10.1130/0-8137-2361-2.329.