Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Artiodactyla Owen, 1848 - even-toed ungulates see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997 Family Cervidae Batsch, 1788 - deer Subfamily Capreolinae Brookes, 1828 Genus Capreolus Gray, 1821 - roe deer Capreolus pygargus (Pallas, 1771) - eastern roe deer [Capreolus pygargus pygargus] Pallas