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Temporal range: early Oligocene to middle Miocene
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Castoridae
Tribe: Anchitheriomyini
Genus: Anchitheriomys
Roger, 1885
Type species
Anchitheriomys weidemanni
  • A. fluminis
  • A. nanus
  • A. senrudi
  • A. stouti
  • A. tungurensis
  • A. weidemanni

Anchitheriomys is an extinct member of the beaver family, Castoridae. It inhabited North America and Eurasia during the middle Miocene.[1] The name of the genus comes from Anchitherium, an extinct genus of horses, and the Greek word for mouse, μῦς (mys), thus meaning "Anchitherium's mouse", because the fossils of both genera usually co-occur.[1]

Until recently, Anchitheriomys was placed in a closely related family of rodents, Eutypomyidae,[2] but a partial skull shows similarities to another early beaver, Agnotocastor.[3]


  1. ^ a b Stefen, Clara; Mörs, Thomas (2008). "The Beaver Anchitheriomys from the Miocene of Central Europe". Journal of Paleontology. 82 (5): 1009–1020. ISSN 0022-3360. doi:10.1666/06-049.1. 
  2. ^ *McKenna, Malcolm C.; Bell, Susan K. (1997), Classification of Mammals Above the Species Level, New York: Columbia University Press, ISBN 0-231-11013-8 
  3. ^ *Korth, William W.; Emry, Robert J. (1997), "The skull of Anchitheriomys and a new subfamily of beavers (Castoridae, Rodentia)", Journal of Paleontology, 71 (2), pp. 343–347