Temporal range: Early Miocene–Early Pliocene 
|T. fossiger specimen at the National Museum of Natural History, Washington, DC|
Teleoceras had much shorter legs than modern rhinos, and a barrel chest, making its build more like that of a hippopotamus than a modern rhino. Like the hippo, it was probably also semi-aquatic. Teleoceras had a single small nasal horn. It was a quite heavy animal, reaching 1.81 tons in weight.
Teleoceras is the most common fossil in the Ashfall Fossil Beds of Nebraska. In fact, its remains were so numerous and concentrated that the building housing the greatest concentraion of Ashfall fossils is dubbed the "Rhino Barn". Most of the skeletons are preserved in a nearly complete state. One extraordinary specimen includes the remains of a Teleoceras calf trying to suckle from its mother. This animal was featured in the episodes "Are Rhinos Dinos?" and "Dawn Of The Cats" of the Paleoworld series.
- Prothero, 2005, pp. 189-194.
- Prothero, 2005, p. 94.
- McKenna & Bell, 1997, p. 483.
- Prothero, 2005, p. 122.
- (Prothero, 2005)
- Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 265. ISBN 1-84028-152-9.
- McKenna, Malcolm C., and Bell, Susan K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York, 631 pp. ISBN 0-231-11013-8
- Prothero, Donald R. 2005. The Evolution of North American Rhinoceroses. Cambridge University Press, Cambridge, 218 pp. ISBN 0-521-83240-3