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 Micoureus Lesson, 1842 Micoureus demerarae (Thomas, 1905) - woolly mouse opossum Micoureus demerarae esmeraldae (Tate, 1931)