Trogosus

Trogosus is an extinct genus of tillodont mammal. Fossils have been found in Wyoming and British Columbia,[2] 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 35 cm (14 in) long with an estimated body weight of 150 kg (330 lb).[3] 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.[4]

Trogosus
Temporal range: Early Eocene–Middle Eocene
Trogosus hyracoides skull at the National Museum of Natural History
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Mammalia
Order:
†Cimolesta
Suborder:
†Tillodontia
Family:
†Esthonychidae
Subfamily:
†Trogosinae
Genus:
†Trogosus

Species[1]
  • †T. castoridens (type)
  • †T. gazini
  • †T. grangeri
  • †T. hillsii
  • †T. hyracoides
  • †T. latidens

Notes
  1. Trogosus in the Paleobiology Database. Retrieved July 2013.
  2. Russell 1935
  3. Kemp 2005, p. 240
  4. Palmer 1999, p. 236

References
  • Kemp, Tom S. (2005). The Origin and Evolution of Mammals. Oxford University Press. ISBN 0198507615. OCLC 56652579.CS1 maint: ref=harv (link)
  • Leidy, J. (1871). "Remains of extinct mammals from Wyoming". Proceedings of the Academy of Natural Sciences. 23: 113–116. Retrieved July 2013. Check date values in: |accessdate= (help)CS1 maint: ref=harv (link)
  • Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. ISBN 1-84028-152-9.CS1 maint: ref=harv (link)
  • Russell, Loris Shano (1935). "A middle Eocene mammal from British Columbia". American Journal of Science. 5. 29: 54–55. doi:10.2475/ajs.s5-29.169.54.CS1 maint: ref=harv (link)


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