Mammalia Linnaeus, 1758 - mammals
   Theria Parker & Haswell, 1897
     Carnivora Bowdich, 1821 - carnivores
       Caniformia Kretzoi, 1943
         Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters
           Mustelinae Batsch, 1788 - weasels
             Galictis Bell, 1826 - grisons
               Galictis cuja (Molina, 1782) - lesser grison
                 Galictis cuja huronax (Thomas, 1921)