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Temporal range: Eocene – Recent
|Pika, Ochotona princeps, in Sequoia National Park|
Lagomorpha is a mammal order. It includes pikas, rabbits and hares. Although the lagomorphs look like rodents, they are not so, but are closely related to them. They have four incisors on the upper jaw, not two as in rodents. Also, they only eat plant material, not meat as rodents do to some extent.
It has been known for some time that the Lagomorpha is an unusual group, and there have been many speculations about its evolution. Darren Naish explains this.
- Order Lagomorpha
- Hoffmann, Robert S.; Andrew T. Smith (2005-11-16). Wilson, D. E., and Reeder, D. M. (eds). ed. Mammal Species of the World (3rd edition ed.). Johns Hopkins University Press. pp. 185-211. . http://www.bucknell.edu/msw3.
- Gregory W.K. 1019. The orders of mammals. Bulletin of the American Museum of Natural History. 27.
- Wood A.E 1957. What, if anything, is a rabbit? Evolution 11, 417((ndash))425.
- Naish, Darren 2010. Tetrapod zoology 2010. Chapter 31, p183 et seq: The most freaky of all mammals: rabbits. ISBN 978-1-905723-61-4