Class Mammalia Linnaeus, 1758 - mammals Count: 21o19f27g86s1ss; †2f2g2s Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Count: [s] 15f;74g;269s;10ss; ‡1f;4g;12s;1ss Family Didelphidae Gray, 1821 - American opossums Count: [*] 11g;77s Genus Monodelphis Burnett, 1830 - short-tailed opossums Count: [*] 17s 1 Subgenus Monodelphis Burnett, 1830 Count: [*] 13s 2 Subgenus Minuania Cabrera, 1919 Count: [*] 4s