Trogosus

Trogosus
Temporal range: Early Eocene–Middle Eocene
Trogosus hyracoides skull at the National Museum of Natural History
Fossil
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Cimolesta
Suborder: Tillodontia
Family: †Esthonychidae
Subfamily: †Trogosinae
Genus: Trogosus
Leidy 1871
Species[1]
  • T. castoridens (type)
  • T. gazini
  • T. grangeri
  • T. hillsii
  • T. hyracoides
  • T. latidens

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 to 33.7 million years ago.

Restoration by Jay Matternes at the Smithsonian Museum

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]

Notes

References

  • Kemp, Tom S. (2005). The Origin and Evolution of Mammals. Oxford University Press. ISBN 0198507615. OCLC 56652579. 
  • Leidy, J. (1871). "Remains of extinct mammals from Wyoming". Proceedings of the Academy of Natural Sciences 23: 113–116. Retrieved July 2013. 
  • Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. ISBN 1-84028-152-9. 
  • 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. 


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