From Wikipedia, the free encyclopedia
Jump to: navigation, search
Temporal range: Late Eocene to Late Oligocene, 38.0–26.3 Ma
Subhyracodon occidentalis.jpg
Subhyracodon occidentalis skeleton
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Perissodactyla
Family: Rhinocerotidae
Genus: Subhyracodon
(Brandt, 1878)
Type species
Rhinoceros occidentalis
  • S. kewi
  • S. mitis
  • S. occidentalis
  • Anchirodon Forbes, 1881[3]
  • Anchisodon Cope, 1879[4]

Subhyracodon is an extinct genus of cow-sized rhinoceroses. With a length of 2.4 m (8 ft) and a weight estimated of 381.3 kg (in S. mitis), it was a tapir-sized herbivore on the plains of early Oligocene South Dakota 33 million years ago (White River Fauna), smaller than only the Megacerops and the chalicotheres.[5] Subhyracodon had no horns, relying more on its speed to escape, but a species found at Wind Cave National Park had a pair of bony nasal ridges. The genera Caenopus and Aceratherium were both synonymized with Subhyracodon[6]

Life restoration by Charles R. Knight

See also[edit]


  1. ^ Prothero, 2005, p. 41.
  2. ^ Prothero, 2005, pp. 40-47.
  3. ^ McKenna & Bell, 1997, p. 481.
  4. ^ a b c Prothero, 2005, p. 43.
  5. ^
  6. ^ C.C. O'Harra (1920). The White River Badlands. Rapid City, SD: South Dakota School of Mines. p. 181. 

External links[edit]