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
             1 Philander andersoni (Osgood, 1913) - Anderson's four-eyed opossum
             2 Philander frenatus (Olfers, 1818) - southeastern four-eyed opossum
             3 Philander mcilhennyi Gardner & Patton, 1972 - McIlhenny's four-eyed opossum
             4 Philander opossum (Linnaeus, 1758) - gray four-eyed opossum