Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Metatheria Huxley, 1880 Order Diprotodontia Owen, 1866 Suborder Macropodiformes Ameghino, 1889 Superfamily Macropodoidea Gray, 1821 Family Potoroidae Gray, 1821 - rat-kangaroos