Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Infraclass Metatheria Huxley, 1880
       Order Diprotodontia Owen, 1866
         Suborder Vombatiformes Burnett, 1830
           1 Family Phascolarctidae Owen, 1839
           2 Family Vombatidae Burnett, 1830 - wombats