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 Cerdocyon Smith, 1839 [monotypic] - crab-eating fox
             Cerdocyon thous (Linnaeus, 1766) - crab-eating fox
               Cerdocyon thous aquilus (Bangs, 1898)