Class [Mammalia] Linnaeus, 1758 - mammals Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Family Didelphidae Gray, 1821 - American opossums Genus Lutreolina Thomas, 1910 - thick-tailed opossum 1 Lutreolina crassicaudata (Desmarest, 1804) - lutrine opossum