Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Diprotodontia Owen, 1866 Suborder Vombatiformes Burnett, 1830 Family Phascolarctidae Owen, 1839 Genus Phascolarctos Blainville, 1816 - koala 1 Phascolarctos cinereus (Goldfuss, 1817) - koala