List of the prehistoric life of Wyoming

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.

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

Life restoration of the Middle-Late Ordovician jawless fish Astraspis
Restorative portrait of the Permian synapsid (mammal prescursor) Burnetia
Fossilized shell of the Late Devonian-Permian brachiopod Composita
Fossilized shells and restored appearances of the Middle-Late Ordovician nautiloid cephalopod Endoceras
Life restoration of the Permian Chimaera relative Helicoprion
Restoration of the Cambrian trilobite Meteoraspis
Fossilized shell of the Ordovician brachiopod Plaesiomys
Fossil of the Cambrian-Ordovician trilobite Saukiella
Fossil of the Cambrian trilobite Tricrepicephalus
Illustration of a living Acipenser sturgeon
Life restoration of the Late Jurassic theropod dinosaur Allosaurus
Image of restored specimen of a squat quadruped with knobby back
Life restoration of the Late Cretaceous armored dinosaur Ankylosaurus
Foliage and cones of a living Araucaria tree
Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites
Restoration of the Late Jurassic sauropod dinosaur Barosaurus rearing to defend itself against a pair of the theropod Allosaurus
Life restoration of a herd of the Late Jurassic sauropod dinosaur Brontosaurus
Restoration of the Late Jurassic ceratosaur Ceratosaurus
Life restoration of the face of the Late Cretaceous multituberculate mammal Cimolomys
Life restoration of the Late Jurassic primmitive tyrannosaur Coelurus
Illustration of fossilized vertebrae of the Late Cretaceous-Eocene snake Coniophis . Othniel Charles Marsh (1892).
Life restoration of the Early Cretaceous dromaeosaur ("raptor") Deinonychus
Restoration of the Late Cretaceous marsupial relative Didelphodon
Life restoration of the Late Jurassic long-necked dinosaur Diplodocus
Mounted fossilized skeleton of the Late Cretaceous plesiosaur Dolichorhynchops
Life restoration of the Late Cretaceous duck-billed dinosaur Edmontosaurus annectens
Fossilized shell of the Late Cretaceous ammonoid cephalopod Eubostrychoceras
Mounted fossilized skeleton of the Late Jurassic armored dinosaur Gargoyleosaurus
Fossilized skeleton of the Middle Jurassic-Late Cretaceous mammal Gobiconodon
Life restoration of the Late Jurassic stegosaur Hesperosaurus
Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size
Fossilized skeleton of the Late Triassic amphibian Koskinonodon
Life restoration of the Late Cretaceous primitive horned dinosaur Leptoceratops
Life restoration of the Late Jurassic plesiosaur Megalneusaurus
Life restoration of the Early Cretaceous oviraptorosaur Microvenator
Historical reconstruction of the holotype skeleton from 1921
Life restoration of the Late Jurassic ichthyosaur Ophthalmosaurus
Pachycephalosaurus
Life restoration of the Late Triassic phytosaur Parasuchus
Phoenicites
Life restoration of the Late Cretaceous mosasaur Platecarpus
Restoration of the Late Triassic crocodile relative Poposaurus with an anachronistic human to scale
Fossilized mandible of the Late Cretaceous-Paleocene mammal Protungulatum
Life restoration of the Late Cretaceous pterosaur Pteranodon
Diagram illustrating the Early Cretaceous long-necked dinosaur Sauroposeidon with anachronistic humans to scale
A living Selaginella , or spikemoss
Restoration of the Late Cretaceous shark Squalicorax
Restoration of the Late Jurassic stegosaur Stegosaurus
Restoration in multiple views of the Late Jurassic sauropod dinosaur Supersaurus with an anachronistic human to scale
Life restoration of the Late Cretaceous herbivorous dinosaur Thescelosaurus
Mounted fossilized skeleton of the Late Cretaceous horned dinosaur Triceratops
Fossilized skeleton of the Late Cretaceous tyrannosaur Tyrannosaurus
Fossil of the Early Triassic-Eocene cycad-like frond Zamites
Living adult (center) and chick (lower right) Accipiter striatus , or sharp-shinned hawks
Life restoration of the Miocene camel Aepycamelus , or the long-necked camel. Heinrich Harder (1920).
Aletomeryx
A living Spatula clypeata , or northern shoveler
Restoration of an Arctodus , or short-faced bear, with a human to scale
A living Asio otus , or long-eared owl
Life restoration of the Paleocene-Eocene pantodont mammal Barylambda
Fossilized skeleton of the eocene-?Miocene boa snake Boavus
Restorative portrait of the Miocene oreodont mammal Brachycrus
A living Buteo jamaicensis , or red-tailed hawk
Skeletons look identical
Modern mounted skeleton of Canis lupus , the grey wolf, to scale with a fossilized skeleton of the Pleistocene wolf Canis dirus , or dire wolf
Life restoration of the Paleocene primate relative Carpolestes simpsoni
Life restoration of the Paleocene-Eocene crocodilian Ceratosuchus
Fossilized skeleton of the Eocene turtle Chisternon
Flowers of a living Cladrastis , or yellowwood
Fossilized skull of the Oligocene-Miocene bone-crushing dog Cormocyon
Fossilized skull of the Eocene crocodilian "Crocodylus" affinis
Life restoration of the Miocene bear-dog Daphoenodon
Fossilized skeleton of the Early Cretaceous-Eocene bony fish Diplomystus preserved in the act of swallowing another fish
Fossilized shell of the Eocene turtle Echmatemys
Life restoration of a pair of the Eocene uintathere mammal Eobasileus . Charles R. Knight (1890s).
Restoration of the Pleistocene-Holocene Equus conversidens , or Mexican horse
Fossilized skeleton of the Eocene bird Fluvioviridavis
Fossilized foliage of the cypress relative Glyptostrobus
Fossilized skull of the Oligocene lizard Helodermoides
Life restoration of the Eocene-Miocene creodont mammal Hyaenodon
Life restoration of the Miocene horse Hypohippus . Heinrich Harder (1920).
Fossilized skeleton of the Eocene bony fish Knightia
Restoration of the Oligocene-Miocene oreodont mammal Leptauchenia
Life restoration of the Paleocene-Eocene bird Lithornis
Painting of a family of mammoths walking
Life restoration of a herd of Mammuthus columbi , or Columbian mammoths. The extent of the fur depicted is hypothetical. Charles R. Knight (1909).
Life restoration of the Miocene three-toed horse Merychippus
Life restoration of the Eocene pangolin relative Metacheiromys
Fossilized skeleton of the Eocene perch relative Mioplosus
Mounted fossilized skeleton of the Miocene Neophrontops
Fossilized skeleton of the Late Cretaceous-Eocene beaked salmon relative Notogoneus
Restoration of the Eocene bat Onychonycteris
Fossilized skeleton of the Eocene horse Orohippus
Life restoration of a pair of the Oligocene-Miocene camel Oxydactylus . Robert Bruce Horsfall (1913).
A living Panthera leo , or lion
Life restoration of the Eocene creodont mammal Patriofelis . Charles R. Knight (1896).
Fossilized skeleton of the Paleocene-Eocene arowana relative Phareodus
Illustration of a fossilized skull in multiple views of the Oligocene-Miocene bone-crushing dog Phlaocyon
Life restoration of the Paleocene-Eocene primate Plesiadapis
Life restoration of the Paleocene-Eocene waterfowl Presbyornis
Life restoration of a female (left) and male of the Oligocene-Miocene even-toed ungulate Protoceras . Charles R. Knight (1896).
Fossilized skeleton of the Paleocene multituberculate mammal Ptilodus
Life restoration of the Miocene-Pliocene pronghorn Ramoceros and Cosoryx . Robert Bruce Horsfall (1913).
Fossilized skeleton of the Eocene monitor lizard Saniwa
Fossilized skeleton of the Eocene-Oligocene creodont mammal Sinopa
Life restoration of the Oligocene-Miocene camel Stenomylus
Life restoration of the Miocene protoceratid mammal Syndyoceras
Restoration of the Miocene-Pliocene rhinoceros Teleoceras
Life restoration of the Paleocene pantodont mammal Titanoides
Life restoration of the Eocene mammal Uintatherium
Leaves and fruit of a living Viburnum .
Life restoration of the Miocene bear dog Ysengrinia