Class [Mammalia] Linnaeus, 1758 - mammals Count: [*] 21o;132f;1061g;4316s; ‡1f;5g;38s Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Count: [*] 16f;75g;273s; ‡1f;3g;9s Family Didelphidae Gray, 1821 - American opossums Count: [*] 14g;75s Genus Lutreolina Thomas, 1910 - thick-tailed opossum Count: [*] 1s Lutreolina crassicaudata (Desmarest, 1804) - lutrine opossum Count: -