Class Mammalia Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855 Family Castoridae Batsch, 1788 - beavers Genus Castor Linnaeus, 1758 - beavers Castor fiber Linnaeus, 1758 - Eurasian beaver