Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Metatheria Huxley, 1880 Order Diprotodontia Owen, 1866 Suborder Macropodiformes Ameghino, 1889 1 Superfamily Petauroidea Bonaparte, 1838 2 Superfamily Macropodoidea Gray, 1821