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

Precambrian

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

Paleozoic

Selected Paleozoic taxa of Wyoming

• †Actinoceras
• †Agassizodus
  • †Agassizodus variabilis
• †Agnostogonus
• †Amphiscapha
• †Amplexus
  • †Anarthraspis chamberlini
• †Archaeocidaris

• 

  †Astraspis
  • †Astraspis desiderata
• †Aviculopecten
  • †Aviculopecten basilicus – or unidentified comparable form
  • †Aviculopecten girtyi
  • †Aviculopecten gryphus
  • †Aviculopecten kaibabensis – or unidentified comparable form
• †Bellerophon
• †Blountiella
• †Bowmania
• †Bucheria – type locality for genus

• 

  †Burnetia
• †Campodus
• †Caninia
• †Cardipeltis
  • †Cardipeltis wallacii
• †Catenipora
• †Cavusgnathus
• †Cedaria
• †Cephalaspis
• †Charactoceras – tentative report
• †Chirognathus
• †Chonetes
• †Cleiothyridina
  • †Cleiothyridina atrypoides
  • †Cleiothyridina elegans – or unidentified related form
  • †Cleiothyridina hirsuta
  • †Cleiothyridina sublamellosa – or unidentified related form
• †Coleodus

• 

  †Composita
  • †Composita elongata
  • †Composita laevis – or unidentified related form
  • †Composita mira
  • †Composita ovata
  • †Composita sigma
  • †Composita subquadrata
  • †Composita subtilita
  • †Composita sulcata
• †Conocardium
• †Coosella
• †Coosia
• †Coosina
• †Cordylodus
• †Crepicephalus
• †Ctenacanthus
  • †Ctenacanthus amblyxiphias
• †Cyrtogomphoceras
• †Deckera
• †Dentalium
• †Distichophytum
• †Drepanophycus
• †Earlandia
• †Edmondia

• 

  †Endoceras
• †Euomphalus
• †Favosites
• †Gastrioceras – report made of unidentified related form or using admittedly obsolete nomenclature
• †Genevievella
• †Geragnostus
• †Girvanella
• †Glikmanius
  • †Glikmanius occidentalis
• †Glyptopleura
• †Goniatites – tentative report
• †Gosslingia

• 

  †Helicoprion
  • †Helicoprion davisii
• †Homagnostus
• †Hyolithes
• †Hypseloconus
• †Idiognathoides
• †Ithyektyphus
• †Janassa
• †Kendallina
• †Kingstonia
• †Kionoceras
• †Kochoceras
• †Lambeoceras
• † Leclercqia
• †Lingula
• †Lingulella
• †Liroceras
• †Lonchocephalus
• †Maryvillia
• †Metacoceras

• 

  †Meteoraspis
• †Micromitra
• †Minicephalus – type locality for genus
• †Naticopsis
  • †Naticopsis judithae
  • †Naticopsis kaibabensis
  • †Naticopsis marthaae – or unidentified comparable form
• †Neospirifer
  • †Neospirifer bakeri
• Nucula – tentative report
• †Olenoides
• †Ozarkodina
• †Paladin
• †Paractinoceras
• †Peripetoceras

• 

  †Plaesiomys
• †Platyceras
• †Platystrophia
• †Posidonia
• †Prodentalium
• †Protaspis
• †Pseudomelania – tentative report
• †Psilophyton
• †Rawlinsella
• †Renalia
• †Sallya

• 

  †Saukiella
• †Sawdonia
• Solemya
• †Solenochilus
• †Spiriferina
• †Spyroceras
• †Stearoceras
• †Streptognathodus
• †Strophomena
• †Syspacheilus
• †Tainoceras
• †Tetrataxis

• 

  †Tricrepicephalus
• †Uncaspis
• †Uranolophus
• †Westonoceras
• †Wilkingia
• †Winnipegoceras
• †Worthenia
• †Zellerina

Mesozoic

Selected Mesozoic taxa of Wyoming

• 

  Acipenser
• †Adocus
• †Agathaumas – type locality for genus
  • †Agathaumas sylvestris – type locality for species
• †Agerostrea
• †Albanerpeton
  • †Albanerpeton galaktion
  • †Albanerpeton nexuosus – type locality for species
• †Albertosaurus – or unidentified comparable form
• †Allognathosuchus

• 

  †Allosaurus – type locality for genus
  • †Allosaurus fragilis – type locality for species
• †Alphadon
  • †Alphadon attaragos – type locality for species
  • †Alphadon halleyi
  • †Alphadon marshi
  • †Alphadon sahnii
• †Amblotherium – type locality for genus
• Amia
• †Amphicoelias
  • †Amphicoelias brontodiplodocus – type locality for species
• †Amphidon – type locality for genus
  • †Amphidon superstes – type locality for species
• †Anaklinoceras
• †Anaschisma – type locality for genus
• †Ancorichnus
• †Andromeda
• †Anemia
• †Angistorhinus – type locality for genus
  • †Angistorhinus aeolamnis – type locality for species
  • †Angistorhinus gracilis – type locality for species
  • †Angistorhinus grandis – type locality for species
  • †Angistorhinus maximus – type locality for species
• †Anisoceras

• 

  †Ankylosaurus
  • †Ankylosaurus magniventris
• Anomia
• Anona
• Antrimpos
• †Apatosaurinae
• †Apatosaurus
  • †Apatosaurus louisae
  • †Apatosaurus minimus
• †Aploconodon – type locality for genus
  • †Aploconodon comoensis – type locality for species
• Aporrhais
• †Aquilina – type locality for genus
• Aralia

• 

  Araucaria
• Arca – report made of unidentified related form or using admittedly obsolete nomenclature
• †Archaeotrigon – type locality for genus
• †Arcticoceras
• †Arenicolites
• Aspideretes
• †Asplenium
• †Astarta
• Astarte
• † Atira – tentative report
• †Atokatheridium – or unidentified comparable form
• †Aublysodon
  • †Aublysodon mirandus

• 

  †Baculites
  • †Baculites asper
  • †Baculites asperiformis
  • †Baculites baculus
  • †Baculites clinolobatus
  • †Baculites cobbani
  • †Baculites codyensis
  • †Baculites crickmayi
  • †Baculites elaisi
  • †Baculites eliasi
  • †Baculites gilberti
  • †Baculites grandis
  • †Baculites gregoryensis
  • †Baculites haresi
  • †Baculites jenseni – or unidentified comparable form
  • †Baculites mariasensis
  • †Baculites mclearni
  • †Baculites obtusus
  • †Baculites perplexus
  • †Baculites reesidei
  • †Baculites rugosus
  • †Baculites scotti
• †Baena
• †Baptanodon
• Barbatia – tentative report

• 

  †Barosaurus
  • †Barosaurus lentus
• †Basilemys
• †Belonostomus
  • †Belonostomus longirostris
• Bombur
• †Borealosuchus
  • †Borealosuchus sternbergii – type locality for species
• Botula
  • †Botula ripleyana
• Brachaelurus
• †Brachiosaurus
• †Brachybrachium – type locality for genus
  • †Brachybrachium brevipes – type locality for species
• †Brachychampsa
  • †Brachychampsa montana
• †Brachyphyllum
• †Brontopodus – or unidentified comparable form

• 

  †Brontosaurus – type locality for genus
  • †Brontosaurus excelsus – type locality for species
  • †Brontosaurus parvus – type locality for species
  • †Brontosaurus yahnahpin – type locality for species
• †Bryceomys
• †Cadoceras
• Callista
• †Calycoceras
• †Camarasaurus – type locality for genus
  • †Camarasaurus grandis – type locality for species
  • †Camarasaurus lentus – type locality for species
• Campeloma
• †Camptosaurus
  • †Camptosaurus dispar – type locality for species
• † Canna
• †Cedrobaena
• †Celastrus – tentative report
• †Ceramornis – type locality for genus
  • †Ceramornis major – type locality for species
• †Ceratodus

• 

  †Ceratosaurus
• Cercidiphyllum
• Cerithium – tentative report
• †Chamops – type locality for genus
• †Champsosaurus
• †Chelonipus – or unidentified comparable form
• Chiloscyllium
• †Chirotherium
  • †Chirotherium barthii
• Chlamys
• †Chondroceras
• †Cimexomys
  • †Cimexomys minor
• †Cimolestes
  • †Cimolestes incisus – type locality for species
  • †Cimolestes stirtoni – type locality for species
• †Cimolodon
  • †Cimolodon nitidus – type locality for species

• 

  †Cimolomys
  • †Cimolomys clarki
  • †Cimolomys gracilis – type locality for species
  • †Cimolomys parvus – type locality for species
• †Cimolopteryx
  • †Cimolopteryx maxima – type locality for species
  • †Cimolopteryx rara
• Cinnamomum
• Cissus
• Cladophlebis
  • †Cladophlebis parva
  • †Cladophlebis readi – type locality for species
  • †Cladophlebis wyomingensis – type locality for species
• †Claraia
  • †Claraia clarai
  • †Claraia mulleri
  • †Claraia stachei
• †Clemensodon – type locality for genus
  • †Clemensodon megaloba – type locality for species
• †Coelosuchus – type locality for genus

• 

  †Coelurus – type locality for genus
  • †Coelurus fragilis – type locality for species
• †Collignoniceras
  • †Collignoniceras woollgari
• †Comobatrachus – type locality for genus
• †Comodactylus – type locality for genus
  • †Comodactylus ostromi – type locality for species
• †Comodon – type locality for genus
  • †Comodon gidleyi – type locality for species
• †Comonecturoides – type locality for genus
• †Comotherium – type locality for genus
• †Compsemys

• 

  †Coniophis – type locality for genus
• †Corax
• Corbula
• †Coriops
• †Corosaurus
  • †Corosaurus alcovensis
• Crenella
• †Cretorectolobus
  • †Cretorectolobus olsoni
• †Ctenacodon – type locality for genus
  • †Ctenacodon laticeps – type locality for species
  • †Ctenacodon scindens – type locality for species
  • †Ctenacodon serratus – type locality for species
• †Cteniogenys – type locality for genus
• Cucullaea
• †Cunningtoniceras
• Cuspidaria
• †Dakotasaurus – type locality for genus
• †Daspletosaurus

• 

  †Deinonychus
  • †Deinonychus antirrhopus
• †Deltatheroides – or unidentified comparable form
• †Dennstaedtia
• Dentalium
  • †Dentalium pauperculum
• †Derrisemys
• †Desmatosuchus
• †Dicotyledon

• 

  †Didelphodon
• †Didymoceras
  • †Didymoceras nebrascense
  • †Didymoceras stevensoni
• †Dinochelys
• †Diospyros
• †Diplocraterion
• †Diplodocinae

• 

  †Diplodocus
  • †Diplodocus carnegii – type locality for species
  • †Diplodocus hallorum
  • †Diplodocus longus
• †Discoscaphites
• †Docodon – type locality for genus
  • †Docodon affinis – type locality for species
  • †Docodon crassus – type locality for species
  • †Docodon striatus – type locality for species
  • †Docodon superus – type locality for species
  • †Docodon victor – type locality for species
• †Dolichobrachium – type locality for genus

• 

  †Dolichorhynchops
  • †Dolichorhynchops osborni
• †Doratodon – tentative report
• †Dorsetisaurus
• †Drinker – type locality for genus
  • †Drinker nisti – type locality for species
• †Dromaeosaurus
• †Dryolestes – type locality for genus
• Dryopteris
• †Dryosaurus
  • †Dryosaurus altus – type locality for species
• †Dryptosaurus – or unidentified comparable form
• †Dyslocosaurus – type locality for genus
  • †Dyslocosaurus polyonychius – type locality for species
• †Echidnocephalus – tentative report
• †Edmontonia
  • †Edmontonia rugosidens – or unidentified comparable form
• †Edmontosaurus

  • 

    †Edmontosaurus annectens – type locality for species
• †Elaphrosaurus – tentative report
• †Elasmosaurus
• †Emarginachelys
• †Empo
• †Enneabatrachus – type locality for genus
  • †Enneabatrachus hechti – type locality for species
• †Eobatrachus – type locality for genus
• †Eocephalites
• †Eopelobates
• †Equisetum
• †Essonodon
  • †Essonodon browni

• 

  †Eubostrychoceras
• †Eubrachiosaurus – type locality for genus
  • †Eubrachiosaurus browni – type locality for species
• †Eucalycoceras
• †Eucrossorhinus
• †Euomphaloceras
• †Euspira
• †Euthlastus – type locality for genus
• †Eutrephoceras
• †Eutretauranosuchus
  • †Eutretauranosuchus delfsi
• †Exiteloceras
• †Exogyra
  • †Exogyra costata
• Fasciolaria
• Ficus
• †Forresteria
• †Fosterovenator – type locality for genus
• †Foxraptor – type locality for genus
• †Fraxinus
• †Galeamopus
  • †Galeamopus hayi
  • †Galeamopus pabsti – type locality for species

• 

  †Gargoyleosaurus
  • †Gargoyleosaurus parkpinorum
• Gerrhonotus – or unidentified comparable form
• †Gervillaria
• †Gervillia
• †Gilmoremys
  • †Gilmoremys lancensis – type locality for species
• Ginglymostoma
• Ginkgo
  • †Ginkgo adiantoides – tentative report
• †Glyptops – type locality for genus
• Glyptostrobus

• 

  †Gobiconodon
• †Goniopholis
• †Gryphaea
• †Habrosaurus – type locality for genus
  • †Habrosaurus dilatus – type locality for species
• †Hamites
• †Haplocanthosaurus
• †Harpactognathus – type locality for genus
  • †Harpactognathus gentryii – type locality for species
• †Heptasuchus – type locality for genus
  • †Heptasuchus clarki – type locality for species

• 

  †Hesperosaurus – type locality for genus
  • †Hesperosaurus mjosi – type locality for species
• †Heteroceras
• †Hoploscaphites
  • †Hoploscaphites birkelundae – type locality for species
  • †Hoploscaphites gilli
  • †Hoploscaphites nodosus
  • †Hoploscaphites plenus
  • †Hoploscaphites quadrangularis
• †Hybodus
  • †Hybodus montanensis
  • †Hybodus wyomingensis – type locality for species
• †Hyperodapedon
  • †Hyperodapedon sanjuanensis – or unidentified comparable form
• †Ichthyodectes

• 

  †Inoceramus
  • †Inoceramus agdjakendensis – or unidentified comparable form
  • †Inoceramus americanus – type locality for species
  • †Inoceramus anglicus
  • †Inoceramus balchii
  • †Inoceramus barabini
  • †Inoceramus crispii
  • †Inoceramus deformis
  • †Inoceramus dimidius
  • †Inoceramus erectus – or unidentified related form
  • †Inoceramus fibrosus
  • †Inoceramus fragilis – or unidentified related form
  • †Inoceramus gibbosus
  • †Inoceramus glacierensis
  • †Inoceramus grandis
  • †Inoceramus incurvus
  • †Inoceramus lundbreckensis
  • †Inoceramus perplexus
  • †Inoceramus prefragilis
  • †Inoceramus proximus – or unidentified related form
  • †Inoceramus sagensis
  • †Inoceramus subcircularis
  • †Inoceramus subcompressus
  • †Inoceramus sublaevis
  • †Inoceramus tenuirostratus
  • †Inoceramus tenuiumbonatus – or unidentified comparable form
  • †Inoceramus turgidus – or unidentified related form
  • †Inoceramus typicus
  • †Inoceramus umbonatus
  • †Inoceramus undabundus
• †Ischyrhiza
  • †Ischyrhiza avonicola – type locality for species
  • †Ischyrhiza basinensis – type locality for species
  • †Ischyrhiza mira
• Isognomon
• Isurus – tentative report
• †Janumys
• †Jeletzkytes
  • †Jeletzkytes dorfi – type locality for species
• †Kaatedocus – type locality for genus
  • †Kaatedocus siberi – type locality for species

• 

  †Koskinonodon – type locality for genus
• †Laolestes – type locality for genus
  • †Laolestes eminens – type locality for species
  • †Laolestes goodrichi – type locality for species
  • †Laolestes oweni – type locality for species
• †Laopteryx – type locality for genus
• †Laosaurus – type locality for genus
  • †Laosaurus celer – type locality for species
• Laurus
• †Lepidotes – or unidentified related form
• Lepisosteus
• †Leptalestes
  • †Leptalestes cooki – type locality for species
  • †Leptalestes krejcii

• 

  †Leptoceratops
  • †Leptoceratops gracilis
• Lima
• Lingula
• Liquidambar
• †Lisserpeton
  • †Lisserpeton bairdi
• †Lissodus
• †Lonchidion – type locality for genus
• †Lonchodytes – type locality for genus
  • †Lonchodytes estesi – type locality for species
• Lucina
• Lunatia – tentative report
• Lygodium
• †Macelognathus – type locality for genus
• Mactra
• †Martinectes
  • †Martinectes bonneri – type locality for species
• †Mecochirus

• 

  †Megalneusaurus
  • †Megalneusaurus rex – type locality for species
• †Megasphaeroceras
• †Melvius
• †Meniscoessus
  • †Meniscoessus intermedius
  • †Meniscoessus robustus – type locality for species
  • †Meniscoessus seminoensis – type locality for species
• †Menuites
• †Mesodma
  • †Mesodma formosa
  • †Mesodma hensleighi
  • †Mesodma primaeva
  • †Mesodma thompsoni – type locality for species
• †Metoicoceras
  • †Metoicoceras geslinianum
  • †Metoicoceras mosbyense – or unidentified comparable form

• 

  †Microvenator
  • †Microvenator celer
• Modiolus
• †Morosaurus
• †Myledaphus
  • †Myledaphus bipartitus
• †Myophorella
  • †Myophorella yellowstonensis
• Myrica
• †Mytilus
• †Nanocuris
• †Nanosaurus
  • †Nanosaurus rex
• †Nanotyrannus – tentative report
• †Naomichelys
• †Nelumbo
• †Neocardioceras
  • †Neocardioceras laevigatum – type locality for species
  • †Neocardioceras minutum – type locality for species
  • †Neocardioceras transiens
  • †Neocardioceras uptonense – type locality for species
• †Neoplagiaulax
• †Nerinea – tentative report

• 

  †Nodosaurus – type locality for genus
  • †Nodosaurus textilis – type locality for species
• †Normannites – tentative report
• Nucula
• †Obamadon
  • †Obamadon gracilis
• †Odaxosaurus – type locality for genus
  • †Odaxosaurus piger – type locality for species
• Odontaspis
• †Oklatheridium
• †Onoclea
• †Ophiopsis

• 

  †Ophthalmosaurus
  • †Ophthalmosaurus natans
• †Opisthias
• †Opisthotriton
• †Ornitholestes – type locality for genus
  • †Ornitholestes hermanni – type locality for species
• †Ornithomimus
  • †Ornithomimus minutus
  • †Ornithomimus sedens – type locality for species
  • †Ornithomimus velox – or unidentified comparable form
• †Osmakasaurus – tentative report
  • †Osmakasaurus depressus
• Ostrea
• †Othnielia
• †Othnielosaurus
  • †Othnielosaurus consors – type locality for species
• †Oxytoma

• 

  †Pachycephalosaurus
  • †Pachycephalosaurus wyomingensis – type locality for species
• †Pachyrhizodus
• †Pachyteuthis
• †Palaeobatrachus
• †Palaeosaniwa – type locality for genus
  • †Palaeosaniwa canadensis – type locality for species
• †Paleopsephurus
  • †Paleopsephurus wilsoni
• †Paleorhinus
  • †Paleorhinus parvus – type locality for species
• †Paliurus
• †Pantosaurus – type locality for genus
  • †Pantosaurus striatus – type locality for species
• †Paracimexomys
  • †Paracimexomys priscus
• †Paradiscoglossus – type locality for genus
• †Paralbula
• †Paramacellodus

• 

  †Parasuchus
• †Paressonodon
• †Pariguana – type locality for genus
• †Parikimys
• †Paronychodon
  • †Paronychodon lacustris – type locality for species
• †Paurodon – type locality for genus
• †Pecopteris
• Pecten
• †Pectinodon – type locality for genus
  • †Pectinodon bakkeri – type locality for species
• Persea – report made of unidentified related form or using admittedly obsolete nomenclature

• 

  †Phoenicites – or unidentified comparable form
• Pholadomya
  • †Pholadomya inaequiplicata
  • †Pholadomya kingi
• †Phragmites
• Phyllodus
• Physa – or unidentified comparable form
• †Piceoerpeton
• Pinna
• Pinus
• Pistacia
• †Pistia
• †Placenticeras
  • †Placenticeras intercalare
  • †Placenticeras meeki
  • †Placenticeras pseudoplacenta
• †Plagiostoma
• Planorbis
• Platanus

• 

  †Platecarpus
  • †Platecarpus tympaniticus
• †Platymya
• †Platypterygius
• †Plesiobaena
• †Plesiopleurodon – type locality for genus
  • †Plesiopleurodon wellesi – type locality for species
• †Plesiosaurus
• Plicatula
• Polinices
• †Polycotylus

• 

  †Poposaurus – type locality for genus
  • †Poposaurus gracilis – type locality for species
• Populus
• †Potamoceratodus
• †Potamornis – type locality for genus
  • †Potamornis skutchi – type locality for species
• †Priacodon
  • †Priacodon ferox – type locality for species
  • †Priacodon grandaevus – type locality for species
  • †Priacodon lulli – type locality for species
  • †Priacodon robustus – type locality for species
• †Prodesmodon – type locality for genus
• †Prodiplocynodon – type locality for genus
  • †Prodiplocynodon langi – type locality for species
• †Protocardia

• 

  †Protungulatum – tentative report
• Prunus
• †Psalodon
  • †Psalodon fortis – type locality for species
  • †Psalodon marshi – type locality for species
  • †Psalodon potens – type locality for species
• †Pseudoperna
  • †Pseudoperna congesta
• †Pteraichnus
  • †Pteraichnus stokesi – type locality for species

• 

  †Pteranodon
  • †Pteranodon longiceps
• †Pteria
• †Pterodactylus
  • †Pterodactylus montanus – type locality for species
• †Ptilotodon
• †Ptychotrygon
  • †Ptychotrygon boothi – type locality for species
• Quercus
• †Rhamnus
• Rhinobatos
• †Rhizocorallium
• †Richardoestesia
  • †Richardoestesia isosceles
• Rostellaria – tentative report
• †Saccoloma – report made of unidentified related form or using admittedly obsolete nomenclature
• Salix
• †Salpichlaena
• Sassafras
• †Saurexallopus – type locality for genus
• †Saurocephalus
• †Saurolophus
• †Sauropelta
  • †Sauropelta edwardsorum

• 

  †Sauroposeidon
  • †Sauroposeidon proteles
• †Saurornithoides – or unidentified comparable form
• †Saurornitholestes
• †Sauvagesia
• †Scapanorhynchus
  • †Scapanorhynchus texanus
• †Scapherpeton
• †Scaphites
  • †Scaphites aquilaensis
  • †Scaphites binneyi
  • †Scaphites hippocrepis
  • †Scaphites stantoni
  • †Scaphites ventricosus
  • †Scaphites whitfieldi
• †Scotiophryne
• Scyliorhinus

• 

  †Selaginella
• Sequoia
• †Skolithos
• †Smilax
• †Socognathus
• Solemya
• †Sparganium
• Sphaerium – or unidentified comparable form
• †Sphenodiscus
  • †Sphenodiscus lobatus – or unidentified comparable form
  • †Sphenodiscus pleurisepta
• †Sphenopteris

• 

  Squalicorax
  • †Squalicorax kaupi
  • †Squalicorax pristodontus
• †Squatirhina
  • †Squatirhina americana – type locality for species
• †Staphylea
• †Stegopelta – type locality for genus
  • †Stegopelta landerensis – type locality for species

• 

  †Stegosaurus – type locality for genus
  • †Stegosaurus armatus – type locality for species
  • †Stegosaurus longispinus – type locality for species
  • †Stegosaurus stenops
  • †Stegosaurus sulcatus – type locality for species
  • †Stegosaurus ungulatus – type locality for species
• Sterculia
• †Stokesosaurus – tentative report
  • †Stokesosaurus clevelandi
• †Struthiomimus – or unidentified comparable form
• †Styxosaurus
  • †Styxosaurus browni – type locality for species

• 

  †Supersaurus
  • †Supersaurus vivianae
• †Tanycolagreus – type locality for genus
  • †Tanycolagreus topwilsoni – type locality for species
• †Tatenectes
  • †Tatenectes laramiensis – type locality for species
• †Tathiodon – type locality for genus
• †Tenea
• †Tenontosaurus
  • †Tenontosaurus tilletti
• Teredo
• †Thalassinoides
• †Theatonius – type locality for genus
• †Theretairus – type locality for genus

• 

  †Thescelosaurus – type locality for genus
  • †Thescelosaurus neglectus – type locality for species
• †Thoracosaurus – or unidentified comparable form
• Thracia
• Thyasira
• †Thyrsopteris
• †Tinodon – type locality for genus
• †Torosaurus – type locality for genus
  • †Torosaurus latus – type locality for species
• †Torotix – type locality for genus
  • †Torotix clemensi – type locality for species
• †Torvosaurus – type locality for genus
  • †Torvosaurus tanneri – type locality for species
• †Trachodon
• †Tragodesmoceras
  • †Tragodesmoceras carlilense
• †Trapa

• 

  †Triceratops – type locality for genus
  • †Triceratops horridus – type locality for species
  • †Triceratops ingens – type locality for species
  • †Triceratops prorsus – type locality for species
  • †Triceratops sulcatus – type locality for species
• †Trigonia
  • †Trigonia americana
  • †Trigonia elegantissima
  • †Trigonia montanaensis
  • †Trigonia quadrangularis
• †Trioracodon
  • †Trioracodon bisulcus – type locality for species
• †Troodon
  • †Troodon formosus
• Typha

• 

  †Tyrannosaurus – type locality for genus
  • †Tyrannosaurus rex – type locality for species
• †Uluops – type locality for genus
  • †Uluops uluops – type locality for species
• Unio
• Vanikoro
• †Viburnum
• Vitis
• Viviparus – or unidentified comparable form
• †Weichselia
• †Williamsonia – tentative report
• †Woodwardia
• †Xenocephalites
• †Xiphactinus
• Yoldia

• 

  †Zamites
  • †Zamites arcticus
  • †Zamites borealis
  • †Zamites brevipennis
• †Zapsalis – or unidentified comparable form
• †Zephyrosaurus – or unidentified comparable form
• †Zofiabaatar – type locality for genus
  • †Zofiabaatar pulcher – type locality for species

Cenozoic

Selected Cenozoic taxa of Wyoming

• †Abuta – or unidentified related form
• †Acacia
• Accipiter
  • †Accipiter gentilis

  • 

    †Accipiter striatus
• Acer
• †Acidomomys – type locality for genus
• †Acrostichum
• †Adilophontes – type locality for genus
• †Adocus
• Aegialia
• Aegolius
  • †Aegolius acadicus
  • †Aegolius funereus

• 

  †Aepycamelus
• †Aesculus
• †Afairiguana – type locality for genus
  • †Afairiguana avius – type locality for species
• Agelaius
  • †Agelaius phoeniceus
• †Agnotocastor
  • †Agnotocastor galushai – type locality for species
• †Agriochoerus
• †Ailanthus
• †Alastor
• Alces
  • †Alces alces
• †Alchornea – or unidentified related form
• †Aletodon

• 

  †Aletomeryx
• Aleurites
• †Allognathosuchus
• †Allophylus
• Alnus
• †Amentotaxus
• Amia
• †Amitabha – type locality for genus
  • †Amitabha urbsinterdictensis – type locality for species
• †Ampelopsis
• †Amphechinus
• Amphiuma
• Amyda
• †Anamirta – or unidentified comparable form
• Anas
  • †Anas acuta

  • 

    †Anas clypeata
  • †Anas crecca
  • †Anas platyrhynchos
• †Anconodon
• †Anemia
• †Anniealexandria – type locality for genus
• †Anobium
• †Anolbanolis – type locality for genus
  • †Anolbanolis banalis – type locality for species
  • †Anolbanolis geminus – type locality for species
• †Anosteira
• †Antherophagus
• Anthonomus
• Antilocapra
  • †Antilocapra americana
• Apalone
• †Aphelops
• Aquila
  • †Aquila chrysaetos
• Aralia
• Araneus
• †Araucaria
• †Archaeocyon
• †Archaeotherium
• †Archaerhineura – type locality for genus
• †Arctocyon

• 

  †Arctodus
  • †Arctodus simus
• †Arctostaphylos
• †Arenahippus
• †Aristolochia
• †Armintomys
  • †Armintomys tullbergi
• †Artocarpus – tentative report
• †Asarkina
• Asio
  • †Asio flammeus

  • 

    †Asio otus
• †Asplenium
• †Astronium
• †Athyana
• †Avunculus
• Aythya
  • †Aythya collaris
• Azolla
• †Babibasiliscus – type locality for genus
• †Baena
• †Bahndwivici – type locality for genus
  • †Bahndwivici ammoskius – type locality for species
• †Baiotomeus
  • †Baiotomeus douglassi
  • †Baiotomeus lamberti

• 

  †Barylambda
• †Bathornis
• †Bathygenys
• †Bathyopsis
• †Batodonoides
  • †Batodonoides vanhouteni – type locality for species
• †Batrachosauroides – tentative report
• Bauhinia
• †Beilschmiedia
• †Berosus
• Betula
• Biomphalaria
• Bison
  • †Bison bison
• †Bisonalveus – type locality for genus
  • †Bisonalveus browni – type locality for species
• †Blechnum
• Bledius

• 

  †Boavus – type locality for genus
• Boletina
• †Bootherium
  • †Bootherium bombifrons
• †Borealosuchus
  • †Borealosuchus formidabilis
  • †Borealosuchus wilsoni – type locality for species
• †Boverisuchus
  • †Boverisuchus vorax

• 

  †Brachycrus
• †Brachyhyops
• †Brachyrhynchocyon
• †Brachyuranochampsa – type locality for genus
  • †Brachyuranochampsa eversolei – type locality for species
• Bracon
• Branta
  • †Branta canadensis
• †Brontops
• †Bryophyte – or unidentified related form
• Bubo
  • †Bubo virginianus
• Buteo

  • 

    †Buteo jamaicensis
  • †Buteo lagopus
  • †Buteo regalis – or unidentified comparable form
• Buteogallus
• †Caedocyon
  • †Caedocyon tedfordi – type locality for species
• †Caenopus
• †Caesalpinia
• †Calamospiza
  • †Calamospiza melanocorys
• Calidris
  • †Calidris melanotos
• †Callomyia
• †Camelops
  • †Camelops hesternus – or unidentified comparable form
• †Canarium
• †Canavalia
• Canis

  • 

    †Canis dirus
  • †Canis latrans
  • †Canis lupus
• †Cantius
  • †Cantius abditus – type locality for species
  • †Cantius frugivorus
  • †Cantius mckennai
  • †Cantius ralstoni
  • †Cantius torresi
  • †Cantius trigonodus – type locality for species
• Capella
  • †Capella gallinago
• Caracara
  • †Caracara plancus
• †Cardiospermum
• Carduelis
• †Carpolestes

  • 

    †Carpolestes simpsoni – type locality for species
• Carya
• Castanea
• Castor
• †Catopsalis
  • †Catopsalis alexanderi
  • †Catopsalis calgariensis
• Cedrela
• †Cedrobaena – type locality for genus
• †Celastrus
• Celtis
• †Centrocercus
  • †Centrocercus urophasianus
• †Cephalogale
• †Ceratophyllum
  • †Ceratophyllum muricatum

• 

  †Ceratosuchus
  • †Ceratosuchus burdoshi
• Cercidiphyllum
• †Cercopis
• †Champsosaurus
• Chara
• Charadrius
  • †Charadrius montanus
  • †Charadrius vociferus
• Charina
• Cheilosia
• †Chelomophrynus – type locality for genus
• †Chilostigma – tentative report
• Chironomus

• 

  †Chisternon
• †Cholula
• †Choragus
• †Chordeiles
  • †Chordeiles minor
• †Chriacus
  • †Chriacus oconostotae
• †Cimolestes
• Cinnamomum
• Circus
  • †Circus cyaneus
• Cissus
• †Cixius – tentative report

• 

  Cladrastis
• †Cnemidaria
• †Coccothraustes
  • †Coccothraustes vespertinus
• Cocculus
• Colaptes
  • †Colaptes auratus
• †Colodon
• †Compsemys
• †Coniophis
• †Copecion
• †Copelemur
• †Corizus – tentative report

• 

  †Cormocyon
• Cornus
• Corvus
  • †Corvus brachyrhynchos
  • †Corvus corax
• †Corylus
• †Coryphodon
• Crataegus
• †Credneria
• Crocodylus

  • 

    †Crocodylus affinis – type locality for species
• †Cryptocephalus
• Cryptorhynchus
• Cryptotis
• Culex
• Cyclocarya
• †Cynarctoides
  • †Cynarctoides acridens
  • †Cynarctoides harlowi
  • †Cynarctoides luskensis – type locality for species
• †Dalbergia
• †Daphoenictis

• 

  †Daphoenodon
• †Daphoenus
  • †Daphoenus lambei
• Dasyatis
• †Davidia
• †Dawsonicyon – type locality for genus
• Dendragapus
  • †Dendragapus obscurus
• †Dendropanax
• †Dennstaedtia
• †Desmatippus
• †Desmatochoerus
• †Desmocyon
• †Diacodexis
• †Diatryma – type locality for genus
• †Diceratherium
• Dicranomyia
• Dicrostonyx
• †Didymictis
• †Dilophodon
• †Dinictis
• †Dinohyus
• †Diospyros
• †Diplocynodon

• 

  †Diplomystus
  • †Diplomystus dentatus
• †Dipoides
• Dipteronia
• Discus
• †Dissacus
• †Distylium
• Dolichopus
• †Dombeya
• †Domnina
• †Drimys
• Dryopteris

• 

  †Echmatemys
• †Ectocion
• †Ectoconus
• †Ectopistes
  • †Ectopistes migratorius
• †Ectopocynus
• †Elaeodendron
• †Enhydrocyon
  • †Enhydrocyon basilatus
• Enochrus
• †Entelodon

• 

  †Eobasileus
  • †Eobasileus cornutus
• †Eoconodon
  • †Eoconodon copanus
• †Eohippus
• †Eorhinophrynus
• †Eostrix
• †Eotitanops
• †Epicaerus
• †Epihippus
• †Equisetum
• Equus

  • 

    †Equus conversidens
• Eremophila
  • †Eremophila alpestris
• Erythrina
• Esox
• †Eucastor
• †Eucommia
• Eugenia
• †Euparius
• Euphagus
  • †Euphagus cyanocephalus
• †Eusmilus
• Eutamias
• Fagus
• Falco
  • †Falco columbarius
  • †Falco mexicanus
  • †Falco rusticolus
  • †Falco sparverius
• Ficus

• 

  †Fluvioviridavis – type locality for genus
• †Fortuna
• †Fraxinus
• †Fulgora
• †Gagadon
  • †Gagadon minimonstrum
• †Galecyon
• Galerita
• †Gallinuloides – type locality for genus
• Gastrocopta
• Gerrhonotus – or unidentified comparable form
• Ginkgo
  • †Ginkgo adiantoides
• †Gleditsia – or unidentified related form

• 

  Glyptostrobus
  • †Glyptostrobus europaeus
• †Goniacodon
• Gopherus
• †Gracilocyon
• Grus
  • †Grus canadensis
• Gulo
  • †Gulo gulo
• †Gymnocladus
• Gyraulus – or unidentified comparable form
• †Habrosaurus
  • †Habrosaurus dilatus
• †Hadrianus
• †Hapalodectes
• †Hapalorestes
• †Haplolambda
• †Harpagolestes
• †Helaletes – type locality for genus
• †Helix

• 

  †Helodermoides
  • †Helodermoides tuberculatus
• †Hemiauchenia
• Hemitelia
• †Heptodon
• †Herpetotherium
  • †Herpetotherium knighti
• †Hesperocyon
• †Heteraletes
• Hirundo – or unidentified comparable form
  • †Hirundo pyrrhonota
• †Holospira
• †Homogalax
• †Hoplophoneus
• †Hovenia
• †Hutchemys

• 

  †Hyaenodon
  • †Hyaenodon crucians
  • †Hyaenodon horridus
  • †Hyaenodon megaloides
  • †Hyaenodon montanus
  • †Hyaenodon mustelinus
  • †Hyaenodon venturae
  • †Hyaenodon vetus
• Hydrangea
• Hydrobia – report made of unidentified related form or using admittedly obsolete nomenclature
• Hydrobius
• †Hydrochus
• †Hydromystria
• †Hylobius
• †Hyopsodus
  • †Hyopsodus lepidus – type locality for species
• †Hypertragulus
• †Hypisodus

• 

  †Hypohippus
• †Hypolagus
• †Hyporhina
• †Hypsiops
• †Hyrachyus
• †Hyracodon
• †Hyracotherium
  • †Hyracotherium vasacciense
• †Icaronycteris – type locality for genus
  • †Icaronycteris index – type locality for species
• †Indusia
• †Intyrictis
• †Ischyromys
• †Iulus
• Juglans
• †Juncitarsus – type locality for genus
• Junco – or unidentified comparable form
  • †Junco hyemalis
• †Kalmia
• †Kalobatippus

• 

  †Knightia
  • †Knightia eocaena
• Koelreuteria
• †Lagopus
  • †Lagopus leucurus – or unidentified comparable form
• †Lambdotherium
• †Lambertocyon
  • †Lambertocyon eximius
• Lanius
  • †Lanius ludovicianus
• Larus – or unidentified comparable form
• Lathrobium
• †Laurinoxylon
• Laurus
• Leiocephalus
• Lepisosteus

• 

  †Leptauchenia
• †Leptictis
• †Leptocyon
• †Leptolambda
• †Leptomeryx
• †Leptoreodon
• †Leptotragulus
• Lepus
• †Leucosticte
  • †Leucosticte arctoa
• †Limnocyon
  • †Limnocyon verus – type locality for species
• †Limnofregata – type locality for genus
  • †Limnofregata azygosternon – type locality for species
• Lindera
• †Lisserpeton
  • †Lisserpeton bairdi
• †Listronotus
• †Lithophysa – type locality for genus

• 

  †Lithornis
  • †Lithornis plebius – type locality for species
  • †Lithornis promiscuus – type locality for species
• Lygodium
• Lynx
  • †Lynx lynx – tentative report
• †Lystra – tentative report
• †Macginitiea
• †Machaeroides
• Macrocranion
• Magnolia
• †Maiorana
• †Mammacyon
• †Mammuthus

  • 

    †Mammuthus columbi
• Marmota
• †Megacerops
• †Megalictis
  • †Megalictis ferox
• †Meliosma
• †Meniscotherium
• †Menoceras
• †Menops
• †Mentoclaenodon
• Mergus
  • †Mergus merganser

• 

  †Merychippus
• †Merychyus
• †Merycochoerus
• †Merycodus
• †Merycoides
• †Merycoidodon
• †Mesatirhinus
• †Mesocyon – report made of unidentified related form or using admittedly obsolete nomenclature
• †Mesodma
  • †Mesodma formosa
  • †Mesodma garfieldensis – or unidentified comparable form
  • †Mesodma hensleighi
  • †Mesodma pygmaea
• †Mesohippus
• †Mesonyx
  • †Mesonyx obtusidens – type locality for species
• †Mesoreodon

• 

  †Metacheiromys
• †Metamynodon
  • †Metamynodon planifrons – or unidentified comparable form
• †Metarhinus
• Metasequoia
  • †Metasequoia occidentalis
• †Metatomarctus
• †Miacis
• †Michenia
• †Microcosmodon
  • †Microcosmodon conus – type locality for species
  • †Microcosmodon rosei – type locality for species
• Microphysula – or unidentified comparable form
• †Microsyops
• Microtus
  • †Microtus pennsylvanicus
• †Mimetodon
  • †Mimetodon churchilli – type locality for species
• †Mimoperadectes
  • †Mimoperadectes houdei – type locality for species
• †Miniochoerus
• †Miocyon
• †Miohippus

• 

  †Mioplosus
• †Miotapirus
  • †Miotapirus harrisonensis – type locality for species
• †Miotylopus
• †Miracinonyx
  • †Miracinonyx studeri
• †Mithrandir
• Mnemosyne
• †Monosaulax
• †Moropus
• Morus
• Mustela
  • †Mustela nigripes
• Myrica
• Myrmica
• †Nanotragulus
• †Neanis
• †Nelumbo
• †Neocathartes
  • †Neocathartes grallator
• †Neoliotomus
  • †Neoliotomus conventus
  • †Neoliotomus ultimus

• 

  Neophrontops
  • †Neophrontops americanus
• †Neoplagiaulax
  • †Neoplagiaulax grangeri – tentative report
  • †Neoplagiaulax hunteri
  • †Neoplagiaulax jepi – type locality for species
  • †Neoplagiaulax mckennai – type locality for species
  • †Neoplagiaulax nelsoni
• Neotoma
• †Nexuotapirus
• †Niglarodon
• †Notharctus
  • †Notharctus robustior
  • †Notharctus tenebrosus – type locality for species
  • †Notharctus venticolus

• 

  †Notogoneus
• †Nototamias – or unidentified comparable form
• †Nucifraga
  • †Nucifraga columbiana
• Numenius
  • †Numenius americanus
  • †Numenius borealis
• †Nyctea
  • †Nyctea scandiaca
• †Nyssa
• Ochotona
  • †Ochotona princeps
• Ocotea
• †Odaxosaurus
  • †Odaxosaurus piger
• Ondatra
• †Onoclea

• 

  †Onychonycteris – type locality for genus
  • †Onychonycteris finneyi – type locality for species
• †Oodectes
• Ophryastes
• †Opisthotriton
• Oreamnos
• †Oreodontoides
• Oreohelix
• †Oreopanax
• †Ormiscus

• 

  †Orohippus
• †Orthogenysuchus – type locality for genus
  • †Orthogenysuchus olseni – type locality for species
• †Osbornodon
• †Osmanthus
• †Osmunda
• †Otarocyon
• †Otiorhynchus
• †Ototriton – type locality for genus
  • †Ototriton solidus – type locality for species
• Ovis
  • †Ovis canadensis
• †Oxyacodon
• †Oxyaena

• 

  †Oxydactylus
• †Pachyaena
• Pachycondyla
• †Palaearctonyx
• †Palaeogale
• †Palaeolagus
• †Palaeonictis
• †Palaeoryctes
• †Palaeosinopa
• †Palaeosyops
• †Palatobaena – type locality for genus
• †Paleoamphiuma – type locality for genus
• Paliurus
• Panthera

  • 

    †Panthera leo
• †Pantolambda
• †Paracathartes
  • †Paracathartes howardae
• †Paracynarctus
• †Paraenhydrocyon
  • †Paraenhydrocyon josephi
• †Parahippus
• †Paramys
• †Parandrita
• †Paratomarctus
• †Paratylopus
• †Parectypodus
  • †Parectypodus lunatus
  • †Parectypodus sinclairi
  • †Parectypodus sylviae
• †Parictis
• †Parvitragulus

• 

  †Patriofelis
  • †Patriofelis ferox – type locality for species
• †Patriomanis
• †Peltosaurus
• †Pelycodus
• †Pentacosmodon
  • †Pentacosmodon pronus – type locality for species
• †Peratherium
• Perognathus
• Peromyscus
• Persea
• †Phalaenoptilus
  • †Phalaenoptilus nuttallii

• 

  †Phareodus
  • †Phareodus encaustus
  • †Phareodus testis
• †Phenacocoelus
• †Phenacodontid
• †Phenacodus
• Phenacomys
• †Philodendron – or unidentified related form
• †Philotrox
  • †Philotrox condoni

• 

  †Phlaocyon
  • †Phlaocyon annectens
  • †Phlaocyon minor
• †Phoebe
• Phragmites – tentative report
• Phyllobius
• Physa
• Pica
  • †Pica pica
• †Piceoerpeton – type locality for genus
• Pinus
• Pipilo
  • †Pipilo chlorurus
• †Plagiomene
• †Planera
• †Planetetherium
  • †Planetetherium mirabile
• †Plastomenoides
• Platanus
• Platycarya
• Platynus
• Plecia

• 

  †Plesiadapis
  • †Plesiadapis cookei
• †Poabromylus
• †Poebrodon
• †Poebrotherium
• Polygyra
• Populus
• Porzana
  • †Porzana carolina
• †Potamogeton

• 

  †Presbyornis
• †Primobucco
• †Princetonia
• †Priscacara
• †Pristichampsus
• †Probathyopsis
• †Procaimanoidea
• †Procamelus
• †Prochetodon
  • †Prochetodon cavus – type locality for species
  • †Prochetodon foxi
  • †Prochetodon taxus – type locality for species
• †Procynodictis
• †Prolimnocyon
• †Promartes
• †Promerycochoerus
• †Proscalops

• 

  †Protoceras
• †Protochelydra
  • †Protochelydra zangerli – or unidentified comparable form
• †Protohippus
• †Protolabis
• †Protomarctus
• †Protorohippus
• †Protostrix
• †Protungulatum
  • †Protungulatum donnae
• †Protylopus
• Prunus
• †Pseudaelurus
• †Pseudhipparion
• †Pseudocrypturus – type locality for genus
  • †Pseudocrypturus cercanaxius – type locality for species
• †Pseudolabis
• †Pseudoprotoceras
• †Psilota
• †Psittacotherium
• Ptelea
• Pteris – or unidentified related form
• Pterocarya

• 

  †Ptilodus
  • †Ptilodus fractus
  • †Ptilodus gnomus
  • †Ptilodus kummae
  • †Ptilodus mediaevus
  • †Ptilodus montanus – or unidentified comparable form
  • †Ptilodus tsosiensis – or unidentified comparable form
  • †Ptilodus wyomingensis – type locality for species
• Puma
  • †Puma concolor
• Pupilla – or unidentified comparable form
• †Pyramidula
• †Pyrocyon
• Quercus
• Quiscalus – or unidentified comparable form

• 

  †Ramoceros
• †Raphictis
• †Rhamnus
• Rhineura – type locality for genus
• Rhinoclemmys – report made of unidentified related form or using admittedly obsolete nomenclature
• Rhus
• †Rhyssa
• †Robinia
• Rosa
• Sabal
• †Saccoloma
• Salix
• †Salpinctes – or unidentified comparable form
  • †Salpinctes obsoletus
• †Salvinia

• 

  †Saniwa – type locality for genus
  • †Saniwa ensidens – type locality for species
• †Sapindus
• Sassafras
• †Scapherpeton
• †Schoepfia
• Sciara
• †Sciophila
• Sequoia
• †Sespia
• †Shoshonius
  • †Shoshonius bowni
  • †Shoshonius cooperi
• †Sialia
• †Sifrhippus
• †Simoedosaurus
• †Sinomenium – or unidentified related form

• 

  †Sinopa
• Siren
  • †Siren dunni – type locality for species
• Sitona
• Sloanea – or unidentified related form
• †Smilax
• †Smilodectes
  • †Smilodectes gracilis – type locality for species
  • †Smilodectes mcgrewi – type locality for species
• Sorex
  • †Sorex hoyi
• †Sparganium
• †Spathorhynchus – type locality for genus
  • †Spathorhynchus fossorium – type locality for species
  • †Spathorhynchus natronicus
• Spermophilus
  • †Spermophilus variegatus
• †Sphenocoelus
• Spirodela
• †Spiza
  • †Spiza americana
• Stagnicola
• †Stegobium
• †Steneofiber

• 

  †Stenomylus
  • †Stenomylus gracilis
  • †Stenomylus hitchcocki
  • †Stenomylus keelinensis
• Sterculia
• †Stillingia
• Sturnella
  • †Sturnella neglecta
• †Stygimys
  • †Stygimys kuszmauli
• †Stylemys
• †Stylinodon
• †Styrax
• †Subhyracodon
• Surnia
  • †Surnia ulula
• †Suzanniwana – type locality for genus
  • †Suzanniwana patriciana – type locality for species
  • †Suzanniwana revenanta – type locality for species
• †Swartzia
• Sylvilagus
• Symplocos
• Synaptomys

• 

  †Syndyoceras
  • †Syndyoceras cooki
• Syrphus
• Tachycineta – or unidentified comparable form
  • †Tachycineta bicolor
• †Taeniolabis
  • †Taeniolabis taoensis
• Tamias
• †Tanymykter
• †Tapocyon
• †Tarka
• Taxidea
  • †Taxidea taxus
• Taxodium
• †Taxonus
• †Teilhardina

• 

  †Teleoceras
• †Telmatherium
• †Temnocyon
• †Tetraclaenodon
• Thelypteris
• †Thouinia
• †Thuja
• Tilia
• Tipula

• 

  †Titanoides
  • †Titanoides gidleyi – type locality for species
  • †Titanoides major
  • †Titanoides nanus – type locality for species
  • †Titanoides primaevus
• †Titanomyrma
  • †Titanomyrma lubei – type locality for species
• †Trapa
• †Trigenicus
• †Trigonias
• Trionyx
• †Tritemnodon
• †Tritoma
• †Triumfetta
• †Trogosus
• †Tropisternus
• †Trypodendron
• †Tsoabichi – type locality for genus
  • †Tsoabichi greenriverensis – type locality for species
• Turdus – or unidentified comparable form
  • †Turdus migratorius
• †Tylocephalonyx
• Tympanuchus
  • †Tympanuchus phasianellus
• Typha – or unidentified related form
• †Tytthaena
• †Uintacyon

• 

  †Uintatherium – type locality for genus
  • †Uintatherium anceps – type locality for species
• Ulmus
• Unio
• Ursus
  • †Ursus arctos
• †Ustatochoerus
• †Valenia
• †Valenopsalis
• †Vassacyon
• †Vauquelinia

• 

  †Viburnum
• †Vinea – or unidentified comparable form
• Vitis
• †Viverravus
• Viviparus
• †Vulpavus
• Vulpes
  • †Vulpes vulpes
• †Woodwardia
• †Xanclomys
  • †Xanclomys mcgrewi – type locality for species
• †Xyronomys

• 

  †Ysengrinia
• †Zamia
• Zelkova
• Zenaida
• Zizyphus
• †Zodiolestes
• Zonotrichia
  • †Zonotrichia albicollis

References

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

• Paleontology in Wyoming
• Lists of prehistoric life in the United States
• Wyoming history-related lists