Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Perissodactyla Owen, 1848 - odd-toed ungulates Family Rhinocerotidae Gray, 1821 - rhinoceroses Subfamily [Rhinocerotinae] Gray, 1821 Genus Dicerorhinus Gloger, 1841 [monotypic] - Sumatran rhinoceros 1 Dicerorhinus sumatrensis (Fischer, 1814) - Sumatran rhinoceros