| Subhyracodon | |
|---|---|
| |
| Subhyracodon occidentalis skeleton | |
Scientific classification
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Perissodactyla |
| Family: | Rhinocerotidae |
| Genus: | †
Subhyracodon Brandt, 1878 |
| Type species | |
| Subhyracodon occidentalis | |
| Species [2] | |
| |
| Synonyms | |
Subhyracodon (Latin: "below the genus Hyracodon") [5]) is an extinct genus of hornless rhinocerotids. With a length of 2.4 m (7 ft 10 in) and an estimated weight of 381 kg (840 lb) in S. mitis,[ citation needed] it was a tapir-sized herbivore on the plains of early Oligocene South Dakota 33 million years ago. It coexisted with other perissodactyls such as horses, brontotheres, and chalicotheres. [6] Subhyracodon had no horns, relying more on its speed to escape from predators, but a species found at Wind Cave National Park had a pair of bony nasal ridges.[ citation needed] The genus Caenopus and species originally referred to as Aceratherium were synonymized into Subhyracodon. [7] It has been suggested to be one of the oldest known members of the subfamily Elasmotheriinae by some studies, [8] though other studies place it firmly outside the Rhinocerotinae-Elasmotheriinae split. [9]
References
- ^ Prothero, 2005, p. 41.
- ^ Prothero, 2005, pp. 40-47.
- ^ McKenna & Bell, 1997, p. 481.
- ^ a b c Prothero, 2005, p. 43.
- ^ "Glossary. American Museum of Natural History". Archived from the original on 20 November 2021.
- ^ "Paleobiology Database: Subhyracodon mitis". Archived from the original on 2012-07-10. Retrieved 2012-05-29.
- ^ C.C. O'Harra (1920). The White River Badlands. Rapid City, SD: South Dakota School of Mines. p. 181.
- ^ Kosintsev, Pavel; Mitchell, Kieren J.; Devièse, Thibaut; van der Plicht, Johannes; Kuitems, Margot; Petrova, Ekaterina; Tikhonov, Alexei; Higham, Thomas; Comeskey, Daniel; Turney, Chris; Cooper, Alan; van Kolfschoten, Thijs; Stuart, Anthony J.; Lister, Adrian M. (2018-11-26). "Evolution and extinction of the giant rhinoceros Elasmotherium sibiricum sheds light on late Quaternary megafaunal extinctions". Nature Ecology & Evolution. 3 (1): 31–38. Bibcode: 2018NatEE...3...31K. doi: 10.1038/s41559-018-0722-0. hdl: 1887/82017. ISSN 2397-334X. PMID 30478308. S2CID 53726338.
- ^ Geraads, Denis; Zouhri, Samir (2021). "A new late Miocene elasmotheriine rhinoceros from Morocco". Acta Palaeontologica Polonica. 66. doi: 10.4202/app.00904.2021.