Class Mammalia Linnaeus, 1758 - mammals
   Order Didelphimorphia Gill, 1872
     Family Didelphidae Gray, 1821 - American opossums
       Subfamily Didelphinae Gray, 1821
         Genus Micoureus Lesson, 1842
           1 Micoureus alstoni (Allen, 1900) - Alston's mouse opossum
           2 Micoureus constantiae (Thomas, 1904) - white-bellied woolly mouse opossum
           3 Micoureus demerarae (Thomas, 1905) - woolly mouse opossum
           4 Micoureus regina (Thomas, 1898) - bare-tailed woolly mouse opossum