White River Fauna

The White River Fauna are fossil animals found in the White River Badlands of South Dakota, Wyoming, Colorado and Nebraska in the United States including Badlands National Park.

The fossils have been found in the White River Formation, Chadron Formation, Brule Formation, and the Arikaree Formation.

Animals from the White River Badlands date from the Eocene, Oligocene, the Miocene, and the Pliocene Epochs.

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List

Genera include:

Genus	Species	Clade	Epoch	Notes
†Agnotocastor	†A. praeteredens (type) †A. coloradensis †A. galushai †A. readingi	Castoridae	Eocene-Miocene
Alligator	†A. prenasalis	Crocodilia	Eocene
†Archaeocyon	†A. leptodus (type) †A. pavidus †A. falkenbachi	†Borophaginae	Oligocene
†Archaeotherium	†A. mortoni (type)	†Entelodontidae	Oligocene
†Bathornis	†B. veredus (type) †B. celeripes †B. cursor †B. fricki †B. geographicus †B. grallator †B. fax? †B. minor	†Bathornithidae	Eocene-Miocene	The type genus of the Bathornithidae, large predatory birds related to seriemas.^[1]
†Bothriodon	†B. sp.	†Anthracotheriidae
†Daeodon	†D. shoshonensis (type) †D. humerosum?	†Entelodontidae	Miocene
†Daphoneus	†D. vetus (type) †D. hartshorianus †D. lambei †D. ruber †D. socialis †D. transversus	†Amphicyonidae	Eocene-Miocene
†Dinictis	†D. felina (type)	†Nimravidae	Eocene-Miocene
†Eporeodon	†E. major (type) †E. occidentalis †E. pygmyus	†Merycoidodontidae	Oligocene
†Hoplophoneus	H. primaevus (type) H. occidentalis H. strigidens H. cerebralis H. dakotensis H. oharrai H. sicarius	†Nimravidae	Eocene-Oligocene
†Hyaenodon		†Hyaenodontidae
†Hypertragulus		†Hypertragulidae
†Hyracodon		†Hyracodontidae
†Ischyromys		†Ischyromyidae
†Leptomeryx		†Leptomerycidae		The most common fossil found in the area.^[2]
†Leptauchenia		†Merycoidodontidae
†Megacerops		†Brontotheriidae
†Merycoidodon		†Merycoidodontidae
†Mesohippus		Equidae
†Metamynodon		†Amynodontidae
†Miniochoerus		†Merycoidodontidae
†Miohippus		Equidae
†Nimravus		†Nimravidae
†Osbornodon		Canidae
†Palaeolagus		Leporidae
†Paracrax		†Bathornithidae		Closely related and similar to the conspecific Bathornis; however, it seems to have occupied more arid environments.^[3]
†Parictis		†Amphicynodontinae
†Peltosaurus		Anguidae
†Poebrotherium	†P. wilsoni (type) †P. chadronensis †P. eximium †P. franki †P. labratum	Camelidae
†Protapirus		Tapiridae
†Protoceras		†Protoceratidae
†Stylemys	†S. nebrascensis (type) †S. botti †S. calaverensis †S. canetotiana †S. capax †S. conspecta †S. copei †S. emiliae †S. frizaciana †S. karakolensis †S. neglectus †S. oregonensis †S. pygmea †S. uintensis †S. undabuna	Testudinidae
†Subhyracodon		Rhinocerotidae
†Xenocranium	†X. pileorivale (type)	†Epoicotheriidae	Oligocene