Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Diprotodontia Owen, 1866 Suborder Phalangeriformes Szalay, 1982 Superfamily Petauroidea Bonaparte, 1838 Family Pseudocheiridae Winge, 1893 Subfamily Hemibelideinae Kirsch et al., 1997 1 Genus Hemibelideus (Collett, 1884) - brush-tipped ring-tailed possum 2 Genus Petauroides Thomas, 1888 - greater gliding possum