Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Diprotodontia Owen, 1866
       Suborder Phalangeriformes Szalay, 1982
         Superfamily Phalangeroidea Thomas, 1888 see Suborder Phalangeriformes Szalay, 1982
           Family Phalangeridae Thomas, 1888 - possums and cuscuses
             Subfamily Phalangerinae Thomas, 1888
               Tribe Trichosurini Flynn, 1911
                 Genus Trichosurus Lesson, 1828 - brush-tailed possums
                   1 Trichosurus arnhemensis Collett, 1897 - northern brushtail possum
                   2 Trichosurus caninus (Ogilby, 1835[1836]) - mountain brushtail possum
                   3 Trichosurus cunninghami Lindenmayer et al., 2002
                   4 Trichosurus johnstonii (Ramsay, 1888)
                   5 Trichosurus vulpecula (Kerr, in Linnaeus, 1792) - common brushtail possum