Trigonias

Trigonias; Temporal range: late Eocene
	T. osborni
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Perissodactyla
Family:	Rhinocerotidae
Genus:	†Trigonias; Lucas, 1900
Type species
	†Trigonias osborni;
Species
	†T. osborni; †T. wellsi;
Synonyms
	†Procaenopus Figgins, 1934;

Trigonias (Greek: "triangular" (trigonos), "ias" [denotes possession]^[3]) is an extinct genus of rhinocerotid from the late Eocene (Chadronian) some 35 million years ago of North America.^[4] 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.^[5]

A specimen of T. osborni was estimated to have a weight of about 391 kilograms (862 lb).^[6]

Notes

^ Prothero, 2005, p. 184.
^ ^a ^b 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 ^{[dead link]}