Class Mammalia Linnaeus, 1758 - mammals Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Family Didelphidae Gray, 1821 - American opossums Genus Monodelphis Burnett, 1830 - short-tailed opossums Subgenus Minuania Cabrera, 1919 Monodelphis fosteri Thomas, 1924 see Monodelphis dimidiata (Wagner, 1847)