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 regina (Thomas, 1898) - bare-tailed woolly mouse opossum Micoureus regina germanus (Thomas, 1904)