Castoridae

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colspan=2 style="text-align: center; background-color: transparent; text-align:center; border: 1px solid red;" | Castoridae
Temporal range: Late Eocene - Recent
American Beaver, Castor canadensis
colspan=2 style="text-align: center; background-color: transparent; text-align:center; border: 1px solid red;" | Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Suborder: Castorimorpha
Family: Castoridae
Hemprich, 1820
colspan=2 style="text-align: center; background-color: transparent; text-align:center; border: 1px solid red;" | Genera

Castor (modern-day Beavers)
plus about 21 extinct genera

Skull of a beaver.

Castoridae is a family of rodents. Today, the only genus that has alive species in it is Castor. It contains modern-day beavers. In addition, about 20 extinct genera of beavers have been put into the family.