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 Dendrolagus Müller, 1839 - tree kangaroos
               Dendrolagus spadix Troughton & Le Souef, 1936 - lowland tree kangaroo