Anchitheriomys

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]

Anchitheriomys Temporal range: early Oligocene to middle Miocene
Fossil
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Castoridae
Tribe:	†Anchitheriomyini
Genus:	†Anchitheriomys Roger, 1885
Type species
†Anchitheriomys weidemanni
Species
†A. fluminis †A. nanus †A. senrudi †A. stouti †A. tungurensis †A. weidemanni †A. buceei
Synonyms
Amblycastor Matthew, 1918

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