Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
           Class Mammalia Linnaeus, 1758 - mammals
             Subclass Theria Parker & Haswell, 1897
               Theria of Metatherian-Eutherian grade
                 Infraclass Eutheria Gill, 1872
                   Order Carnivora Bowdich, 1821 - carnivores
                     Superfamily Arctoidea Flower, 1869 see Infraorder Arctoidea Flower, 1869
                       Family Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters