Class Mammalia Linnaeus, 1758 - mammals Order Didelphimorphia Gill, 1872 Family Didelphidae Gray, 1821 - American opossums Subfamily Didelphinae Gray, 1821 Genus Thylamys Gray, 1843 Thylamys macrura (Olfers, in W.L. Eschwege, 1818) see Thylamys macrurus (Olfers, 1818)