Class [Mammalia] Linnaeus, 1758 - mammals Order Rodentia Bowdich, 1821 - rodents Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels Genus Spermophilus Cuvier, 1825 - ground squirrels Spermophilus fulvus Lichtenstein, 1823 - large-toothed souslik