Borophagus orc

Borophagus orc[1]
Temporal range: Late Miocene to Early Pliocene 10.3–4.9 Ma
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Canidae
Genus: †Borophagus
Species:
†B. orc
Binomial name
†Borophagus orc
Webb, 1969

Borophagus orc is an extinct species of the genus Borophagus of the subfamily Borophaginae, a group of canids endemic to North America from the 10.3 Mya to 4.9 Mya. Borophagus orc existed for approximately 5.4 million years.[2]

Overview

Borophagus, like other Borophaginae, are loosely known as "bone-crushing" or "hyena-like" dogs. Though not the most massive borophagine by size or weight, it had a more highly evolved capacity to crunch bone than earlier, larger genera such as Epicyon, which seems to be an evolutionary trend of the group (Turner, 2004). During the Pliocene epoch, Borophagus began being displaced by Canis genera such as Canis edwardii and later by Canis dirus. Early species of Borophagus were placed in the genus Osteoborus until recently, but the genera are now considered synonyms.[1] Borophagus orc possibly led a hyena-like lifestyle scavenging carcasses of recently dead animals.[3]

Taxonomy

Typical features of this genus are a bulging forehead and powerful jaws; it was probably a scavenger.[4] Its crushing premolar teeth and strong jaw muscles would have been used to crack open bone, much like the hyena of the Old World. The adult animal is estimated to have been about 80 centimetres (31 in) in length, similar to a coyote, although it was much more powerfully built.[5]

Recombination

Borophagus orc was recombined by X. Wang in 1999. It was previously named Osteoborus orc.[6]

Fossil distribution

Specimens have been found at only two sites: near Withlacoochee River, Florida and coastal North Carolina.

References

  1. ^ a b Wang, Xiaoming; Richard Tedford; Beryl Taylor (1999-11-17). "Phylogenetic systematics of the Borophaginae" (PDF). Bulletin of the American Museum of Natural History. 243. Archived from the original (PDF) on 2007-03-20. Retrieved 2007-07-08.
  2. ^ PaleoBiology Database: Borophagus orc, basic info
  3. ^ Wang, Xiaoming; White, Stuart C; Balisi, Mairin; Biewer, Jacob; Sankey, Julia; Garber, Dennis; Tseng, Z Jack (2018). "First bone-cracking dog coprolites provide new insight into bone consumption in Borophagus and their unique ecological niche". eLife. 7. doi:10.7554/eLife.34773. ISSN 2050-084X. PMC 5963924. PMID 29785931.
  4. ^ Lambert, David (1985). The Field Guide to Prehistoric Life. New York: Facts on File. p. 163. ISBN 0-8160-1125-7.
  5. ^ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 220. ISBN 1-84028-152-9.
  6. ^ "Fossilworks: Gateway to the Paleobiology Database". paleodb.org. Retrieved 2020-01-02.

Notes

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