Castoridae
| Castoridae Temporal range: Late Eocene - Recent
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| American Beaver, Castor canadensis | |
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| Family: | Castoridae Hemprich, 1820
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Castor (modern-day Beavers) | |
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.