Class [Mammalia] Linnaeus, 1758 - mammals Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Family Potoroidae Gray, 1821 - rat-kangaroos Genus Bettongia Gray, 1837 - short-nosed "rat"-kangaroos Bettongia gaimardi (Desmarest, 1822) - Tasmanian bettong