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
               1 [Cerdocyon thous thous] (Linnaeus, 1766)
               2 Cerdocyon thous aquilus (Bangs, 1898)
               3 Cerdocyon thous azarae (Wied-Neuwied, 1824)
               4 Cerdocyon thous entrerianus (Burmeister, 1861)
               5 Cerdocyon thous germanus Allen, 1923
               6 Cerdocyon thous soudanicus (Thomas, 1903)