Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Diprotodontia Owen, 1866
       Suborder Macropodiformes Ameghino, 1889
         Family Macropodidae Gray, 1821 - wallabies and kangaroos
           Subfamily Macropodinae Gray, 1821
             Genus Petrogale Gray, 1837 - rock wallabies
               Petrogale penicillata (Gray, in Griffith et al., 1827) - brush-tailed rock wallaby