List of the Cenozoic life of Montana

This list of the Cenozoic life of Montana contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Montana and are between 66 million and 10,000 years of age.

Living Abies , or fir trees
Mounted fossilized skeleton of the Miocene horse Acritohippus
Life restoration of the Miocene camel Aepycamelus , or the long-necked camel. Heinrich Harder (1920).
Life restoration of the Miocene elephant relative Amebelodon . Margret Flinsch (1932).
Life restoration of the Miocene-Pliocene beardog Amphicyon
Fossilized tooth of the Oligocene-Miocene shark Carcharocles angustidens
Fossilized skull of the Oligocene bone-crushing dog Archaeocyon
Restoration of an Arctodus , or short-faced bear, with a human to scale
A living Astronium tree, which is related to cashews
Living Azolla water ferns
Shoot and flowers of a modern Berberis , or barberry
Mounted fossilized skeleton of the Pleistocene Bison latifrons , also known as the giant bison or long-horned bison
Restorative portrait of the Miocene oreodont mammal Brachycrus
Life restoration of the Pliocene-Holocene camel Camelops
Life restoration of the Paleocene primate relative Carpolestes
A living Castor canadensis , or North American beaver
Flowers of a living Cercis or redbud tree
Life restoration of the Late Cretaceous-Eocene choristoderan reptile Champsosaurus
A living Cinnamomum , or cinnamon tree
Illustration of fossilized vertebrae of the Late Cretaceous-Eocene snake Coniophis . Othniel Charles Marsh (1892).
Fossilized skeleton of the Miocene pronghorn-relative Cosoryx
A living Cynomys ludovicianus , or black-tailed prairie dog
Foliage of a living Dalbergia retusa tree
Life restoration of the Eocene-Miocene false saber-toothed cat Dinictis . Robert Bruce Horsfall (1913).
Fossilized samara of the Eocene-modern Dipteronia tree
Fossilized horns, jaws, and limb bones of the Miocene deer relative Dromomeryx
Fossilized skull of the Paleocene-Eocene mammal Ectocion
Life restoration of the Eocene-Oligocene anthracothere mammal Elomeryx
Mounted fossilized skeleton of the Miocene bone-crushing dog Epicyon
Life restoration of the Pleistocene-Holocene Equus conversidens , or Mexican horse
Foliage and fruit of a modern Euonymus
A living Fokienia cypress tree
Restored foliage of the Late Cretaceous-Miocene ginkgo tree Ginkgo adiantoides
Fossilized skull of the Oligocene lizard Helodermoides
Life restoration of the Eocene-Oligocene dog Hesperocyon . Robert Bruce Horsfall (1913).
Restoration of Pliocene-Pleistocene Homotherium , or scimitar cat
Mounted fossilized skeleton of the Eocene-Miocene even-toed ungulate Hypertragulus
Mounted fossilized skeleton of the Eocene-Oligocene rodent Ischyromys
A living Juglans regia also known as the Persian or English walnut
A living Koelreuteria tree
Living Laurus , or laurel trees
Life restoration of the Eocene-Oligocene even-toed ungulate Leptomeryx
Life restoration of the Paleocene-Eocene bird Lithornis
A living Lynx rufus , or bobcat
Close-up view of a Magnolia flower
Life restorations of a Mammut americanum , or American mastodon (right), and a Mammuthus primigenius , or wooly mammoth (left)
Life restoration of battling males of the Eocene brontothere mammal Megacerops
Mounted fossilized skeleton of the Miocene pronghorn Merycodus
Fossilized skull of the Miocene oreodont mammal Mesoreodon
Life restoration of the Paleocene-Eocene mammal Miacis
Fossilized skull of the Eocene-Oligocene three-toed horse Miohippus
Life restoration of a herd of Neohipparion . Robert Bruce Horsfall (1913).
A living Nuphar water lily
A living Odocoileus deer
A living Ondatra , or muskrat
Living Osmunda ferns
Life restoration of a pair of the Oligocene-Miocene camel Oxydactylus . Robert Bruce Horsfall (1913).
Restoration of the Oligocene rabbit relative Palaeolagus
Restorative model and fossilized skull of the Eocene brontothere mammal Palaeosyops
Flowers and foliage of a living Paliurus
Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
Fossilized skull of the Eocene-Oligocene lizard Peltosaurus
Life restoration of the Paleocene-Eocene ungulate Phenacodus . Charles R. Knight (1898).
A living Pinus , or pine tree
Life restoration of the Paleocene-Eocene primate Plesiadapis
Illustration of a fossilized skull of the Oligocene false faber-toothed cat Pogonodon
Fossil of the Eocene ant Proiridomyrmex
Fossil of the Oligocene ant Protazteca
Fossilized skeleton of the Miocene horse Protohippus
Replica of a fossilized cranium of the Miocene horse Pseudhipparion
Life restoration of the Paleocene taeniodont mammal Psittacotherium multifragum
Life restoration of the Late Cretaceous-Paleocene primate relative Purgatorius
A living Quercus , or oak tree
A living Rangifer tarandus , or reindeer
A living Salix , or willow
Fossilized leaf of the Eocene sassafras Sassafras hesperia
Fossilized branch fragment from a Sequoia affinis
Life restoration of the Oligocene-Miocene camel Stenomylus
Life restoration of the Miocene deer relative Subdromomeryx . Robert Bruce Horsfall (1913).
Restoration of the Paleocene multituberculate mammal Taeniolabis
Restoration of the Miocene-Pliocene rhinoceros Teleoceras
A living Thomomys talpoides , or northern pocket gopher
Life restoration of the Paleocene pantodonts mammal Titanoides
A living Ulmus , or elm
A variety of modern Vaccinium species, clockwise from top right: cranberries, lingonberries, blueberries, and huckleberries
Leaves and fruit of a living Vitis , or grapevine
Living Woodwardia ferns
Leaf of a living Zelkova tree