Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Carnivora Bowdich, 1821 - carnivores
       Suborder Caniformia Kretzoi, 1943
         Family Canidae Batsch, 1788 - dogs, wolves, coyotes, jackals, and foxes
           Genus Urocyon Baird, 1857 - grey foxes
             Urocyon cinereoargenteus (Schreber, 1775) - gray fox
               Urocyon cinereoargenteus townsendi Merriam, 1899