Linzey, Donald W. Wytheville Community College, Wytheville, Virginia.
- Mountain beaver
- American beaver
- Eurasian beaver
- Links to Primary Literature
- Additional Readings
The common name for the most primitive living rodent. The beaver has an ancestry that goes back to the time when modern mammals evolved. Two families and three species of beavers exist in the world. The family Aplodontidae contains a single species: the mountain beaver (Aplodontia rufa). The family Castoridae contains two species: the American beaver (Castor canadensis; see illustration) and the Eurasian beaver (Castor fiber). See also: Mammalia; Rodentia
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