Sphenocoelus

Sphenocoelus
Temporal range: Middle Eocene (early Uintan), 46.3–45.7 Ma[1]
Skeletal reconstruction of Sphenocoelus sp.
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Placentalia
Order: Perissodactyla
Family: †Brontotheriidae
Genus: †Sphenocoelus
Osborn, 1895
Species
  • S. uintensis (Osborn, 1895)
Synonyms
  • Dolichorhinoides

Sphenocoelus is an extinct genus of brontothere known from North America during the Middle Eocene.

Description

Sphenocoelus is an average-sized brontothere, with a dolichocephalic skull.[2][3] Some specimens of Sphenocoelus bear a prominent sagittal crests, though others lack them entirely.[4] The molars are long and narrow, and the third and fourth premolars have a cusp on the posterior medial (central hind) portion of the tooth.[2] They bear four digits on the forefeet.[5]

Classification

Sphenocoelus has had a complicated classification history, with many genera being split off or lumped within the group at various times.[4][5] Currently, Sphenocoelus is placed within Brontotheriidae.[2][5][4] The genus Dolichorhinus was once considered a species of Sphenocoelus, S. hyognathus, but is now in its own genus.[6][5]

References

  1. ^ Hodnett, John-Paul M.; Welsh, Edward T.; Santucci, Vincent L.; Tweet, Justin S. (2022). "A Middle Eocene brontothere (Mammalia; Perissodactyla; Brontotheriidae) from Yellowstone National Park, Wyoming". FOSSIL RECORD 8. New Mexico Museum of Natural History and Science. p. 211.
  2. ^ a b c Granger, Walter; Gregory, William K (1943). "A revision of the Mongolian titanotheres". Bulletin of the AMNH. 80 10. New York: American Museum of Natural History: 363–364.
  3. ^ Osborn, Henry Fairfield; Peterson, Olof August (1895). "Fossil mammals of the Uinta Basin : expedition of 1894". Bulletin of the AMNH. 7 2. New York: American Museum of Natural History: 98–102.
  4. ^ a b c Mader, Bryn J. (2008-07-30). "A species level revision of Bridgerian and Uintan brontotheres (Mammalia, Perissodactyla) exclusive of Palaeosyops". Zootaxa. 1837 (1): 1–85. Bibcode:2008Zoot.18377.1.1M. doi:10.11646/zootaxa.1837.1.1. ISSN 1175-5334.
  5. ^ a b c d Mihlbachler, Matthew (2008). "Species Taxonomy, Phylogeny, and Biogeography of the Brontotheriidae (Mammalia: Perissodactyla)". Bulletin of the American Museum of Natural History. 501: 1. doi:10.1206/0003-0090(2008)501[1:stpabo]2.0.co;2.
  6. ^ [email protected], Bryn J. Mader~Queensborough Community (2019-02-12). "The narial morphology of Metarhinus and Sphenocoelus (Mammalia, Perissodactyla, Brontotheriidae)". Palaeontologia Electronica. Retrieved 2026-01-28.

Stub icon

This prehistoric odd-toed ungulate-related article is a stub. You can help Wikipedia by adding missing information.

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.