Trogosus Explained

Trogosus is an extinct genus of tillodont mammal. Fossils have been found in Wyoming, California,^[1] and British Columbia, and date from the Eocene between 54.8 and 33.7 million years ago.

Trogosus was a bear-like herbivore with a large, short skull and flat feet, and had a skull 35cm (14inches) long with an estimated body weight of 150kg (330lb). It had large, rodent-like incisors, which continued growing throughout the creature's life. Judging from the heavily worn molar teeth, Trogosus fed on rough plant material, such as roots and tubers.

References

• Book: Kemp, Tom S. . The Origin and Evolution of Mammals . 2005 . Oxford University Press . 0198507615 . 56652579 .
• Leidy . J. . Joseph Leidy . Remains of extinct mammals from Wyoming . 1871 . Proceedings of the Academy of Natural Sciences . 23 . 113–116 . July 24, 2013 .
• Book: Palmer . D. . The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals . 1999 . Marshall Editions . London . 1-84028-152-9 .
• Russell . Loris Shano . A middle Eocene mammal from British Columbia . 1935 . American Journal of Science . 5 . 29 . 169 . 54–55 . 10.2475/ajs.s5-29.169.54 .

Notes and References

1. Miyata . Kazunori . Deméré . Thomas A. . 17 February 2016 . New material of a 'short-faced' Trogosus (Mammalia, Tillodontia) from the Delmar Formation (Bridgerian), San Diego County, California, U.S.A. . Journal of Vertebrate Paleontology . 36 . 3 . e1089878 . 10.1080/02724634.2016.1089878 . 130776132 . 11 April 2022.