''Uintaceras'' is an extinct genus of medium-sized early rhinocerotoids that lived in

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

(

Wyoming Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...

and

Utah Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...

) during the Middle Eocene, with only the type species ''U. radinskyi'', named in 1997, currently contained within the genus.L. T. Holbrook and S. G. Lucas. 1997. A New Genus of Rhinocerotoid from the Eocene of Utah and the Status of North American "'' Forstercooperia''". ''Journal of Vertebrate Paleontology'' 17(2):384-396 Traditionally considered the oldest and most primitive species of the Rhinocerotidae, it may instead have been a close relative of the Asian Paraceratheriidae. The dubious species '' Forstercooperia'' ('' Hyrachyus'') ''grandis'' (Radinsky, 1967; Peterson, 1919)Peterson, O.A. (1919). "Report upon the Material Discovered in the Upper Eocene of the Uinta Basin by Earl Douglas in the years 1908-1909, and by 0. A. Peterson in 1912". ''Annals of the Carnegie Museum''. pp. 40–168. is also possibly the same animal as ''Uintaceras'', although the Asian material of ''F. grandis'' was assignable to ''Forstercooperia confluens''. ''Uintaceras'' weighed about when fully grown. It was a relatively slender animal and ''Uintaceras'' resembled a typical hyracodontid (e.g. '' Hyracodon''), but differed from the hyracodonts due to the presence of a primitive four-fingered hand and a number of other features of the structure of the legs, which were clearly not intended for fast and long running.

References

Rhinocerotoidea Prehistoric mammals of North America Paleontology in Utah Paleontology in Wyoming Eocene rhinoceroses Fossil taxa described in 1997 Prehistoric mammals {{Paleo-oddtoedungulate-stub