White River Fauna

The White River Fauna are fossil animals found in the White River Badlands of South Dakota, Wyoming and Nebraska in the United States including the Badlands National Park. The fossils have been found in the Chadron, Brule, and the Arikaree Formations. Animals from the White River Badlands date from the Oligocene, the Miocene, and the Pliocene Epochs.

Gerera include:
 * Alligator (Crocodilian)
 * Archaeotherium (Entelodont)
 * Dinictis (Nimravid)
 * Eporeodon (Oreodont)
 * Eusmilus (Nimravid)
 * Hoplophoneus (Nimravid)
 * Hyaenodon (Creodont)
 * Hyracodon (Running Rhino)
 * Ischyromys (Ground Squirrel-like Rodent)
 * Leptomeryx (Tragulid)
 * Merycoidodon (Oreodont)
 * Metamynodon (Aquatic Rhino)
 * Miniochoerus (Oreodont)
 * Poebrotherium (Camel)
 * Subhyracodon (Rhinoceros)