Class Mammalia Linnaeus, 1758 - mammals Order Didelphimorphia Gill, 1872 Family Didelphidae Gray, 1821 - American opossums Subfamily Didelphinae Gray, 1821 Genus Marmosops Matschie, 1916 Marmosops handleyi (Pine, 1981) - Handley's slender opossum