Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Didelphimorphia Gill, 1872 Family Didelphidae Gray, 1821 - American opossums Subfamily Didelphinae Gray, 1821 Genus Philander Brisson, 1762 - gray and black "four-eyed" opossums Philander andersoni (Osgood, 1913) - Anderson's four-eyed opossum