Ischyromys

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Ischyromys
Temporal range: Early Eocene–Early Oligocene
Ischyromys.jpg
Ischyromys skeleton, Smithsonian National Museum of Natural History
Conservation status
Fossil
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Suborder: Sciurognathi
Family: Ischyromyidae
Genus: Ischyromys
Leidy, 1856
Species
  • I. typus (type)
  • I. blacki
  • I. douglassi
  • I. junctus
  • I. veterior

Ischyromys is an extinct genus of rodent from North America.

Skull

The 60 cm (2 ft) long creature is one of the oldest rodents known. It resembled a mouse and already had characteristic rodent incisors. Ischyromys's hind legs were longer than the forelegs, which could be used for other means than walking. Unlike most other mammals of its time, Ischyromys was probably arboreal (along with its relative Paramys). It was a well-adapted climber that gradually beat out competition from rodent-like arboreal plesiadapiform primates.[1]

References[edit]

  1. ^ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 283. ISBN 1-84028-152-9.