Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Dasyuromorphia Gill, 1872
       Family Dasyuridae Goldfuss, 1820 - marsupial "mice" and "cats", and Tasmanian devil
         Subfamily Sminthopsinae Archer, 1982
           Tribe Planigalini Archer, 1982
             Genus Planigale Troughton, 1928 - flat-skulled marsupial "mice"
               Planigale ingrami (Thomas, 1906) - long-tailed planigale
                 [Planigale ingrami ingrami]ᵀ (Thomas, 1906)