Trigonias
This article is about the extinct rhinoceros. For the bivalves, see Trigoniidae.
Trigonias Temporal range: late Eocene[1] | |
---|---|
![]() | |
T. osborni | |
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Perissodactyla |
Family: | Rhinocerotidae |
Genus: | †Trigonias Lucas, 1900 |
Type species | |
†Trigonias osborni | |
Species[2] | |
| |
Synonyms | |
|
Trigonias is an extinct genus of rhinoceros from the late Eocene (Chadronian) some 35 million years ago of North America (Prothero, 2005).
![](../I/m/Trigonias_Jay_Matternes.jpg)
Restoration by Jay Matternes
It is the oldest rhino of which is still alive. Trigonias was about 2.1 m (7 ft) long and, despite lacking horns, looked a lot like modern rhinos. Its front legs had five toes (as contrasted with three in modern rhinos), the fifth of which was vestigal.[4]
A specimen of T. osborni was estimated to have a weight of about 391.4 kg (862.9 lbs).[5]
Notes
- ↑ Prothero, 2005, p. 184.
- ↑ Prothero, 2005, pp. 35-37.
- ↑ Prothero, 2005, p. 35.
- ↑ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 264. ISBN 1-84028-152-9.
- ↑ http://paleodb.org/cgi-bin/bridge.pl?a=basicTaxonInfo&taxon_no=52444
References
- Prothero, Donald R. 2005. The Evolution of North American Rhinoceroses. Cambridge University Press, Cambridge, 218 pp. ISBN 0-521-83240-3
This article is issued from Wikipedia - version of the 6/30/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.