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
                 1 [Gulo gulo gulo] (Linnaeus, 1758)
                 2 Gulo gulo albus (Kerr, 1792)
                 3 Gulo gulo katschemakensis Matschie, 1918
                 4 Gulo gulo luscus (Linnaeus, 1758)
                 5 Gulo gulo luteus Elliot, 1904
                 6 Gulo gulo vancouverensis Goldman, 1935