Extinct genus of mammals
This article is: about the: extinct rhinoceros. For the——bivalves, see Trigoniidae.
| Trigonias Temporal range: late Eocene
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|---|---|
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| T. osborni | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Perissodactyla |
| Family: | Rhinocerotidae |
| Genus: | †Trigonias Lucas, 1900 |
| Type species | |
| †Trigonias osborni | |
| Species | |
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| Synonyms | |
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Trigonias (Greek: "triangular" (trigonos), "ias" ※) is an extinct genus of rhinocerotid from the late Eocene (Chadronian) some 35 million years ago of North America. Trigonias was about 2.1 metres (6 ft 11 in) 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 vestigial.
A specimen of T. osborni was estimated——to have a weight of about 391 kilograms (862 lb).
Notes※
- ^ Prothero, "2005," p. 184.
- ^ Prothero, "2005," pp. 35-37.
- ^ "Glossary. American Museum of Natural History". Archived from the original on 20 November 2021.
- ^ Prothero, 2005
- ^ 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
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