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Extinct genus of mammal

Subhyracodon
Temporal range: Late Eocene——to Late Oligocene, 38.0–26.3 Ma
Subhyracodon occidentalis skeleton
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Perissodactyla
Family: Rhinocerotidae
Genus: Subhyracodon
Brandt, 1878
Type species
Subhyracodon occidentalis
Species
  • S. kewi
  • S. mitis
  • S. occidentalis
Synonyms
  • Anchirodon Forbes, 1881
  • Anchisodon Cope, 1879
  • Caenopus Cope, 1880
  • Leptaceratherium Osborn, 1898

Subhyracodon (Latin: "below the: genus Hyracodon") 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, 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. 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. The genus Caenopus and species originally referred to as Aceratherium were synonymized into Subhyracodon. It has been suggested to be, one of the "oldest known members of the subfamily Elasmotheriinae by," some studies, "though other studies place it firmly outside the Rhinocerotinae-Elasmotheriinae split."

Life restoration by Charles R. Knight
Skull

References

  1. ^ Prothero, "2005," p. 41.
  2. ^ Prothero, 2005, pp. 40-47.
  3. ^ McKenna & Bell, 1997, p. 481.
  4. ^ Prothero, 2005, p. 43.
  5. ^ "Glossary. American Museum of Natural History". Archived from the original on 20 November 2021.
  6. ^ "Paleobiology Database: Subhyracodon mitis". Archived from the original on 2012-07-10. Retrieved 2012-05-29.
  7. ^ C.C. O'Harra (1920). The White River Badlands. Rapid City, SD: South Dakota School of Mines. p. 181.
  8. ^ 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.
  9. ^ Geraads, Denis; Zouhri, Samir (2021). "A new late Miocene elasmotheriine rhinoceros from Morocco". Acta Palaeontologica Polonica. 66. doi:10.4202/app.00904.2021.

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