Class [Mammalia] Linnaeus, 1758 - mammals Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Family Didelphidae Gray, 1821 - American opossums Genus Philander Brisson, 1762 - gray and black "four-eyed" opossums Philander mcilhennyi Gardner & Patton, 1972 - McIlhenny's four-eyed opossum