Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Carnivora Bowdich, 1821 - carnivores
       Suborder Caniformia Kretzoi, 1943
         Family Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters
           Subfamily Mustelinae Batsch, 1788 - weasels
             Genus Gulo Pallas, 1780 [monotypic] - wolverine
               Gulo gulo (Linnaeus, 1758) - wolverine
                 Gulo gulo luteus Elliot, 1904