Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Carnivora Bowdich, 1821 - carnivores
       Suborder Caniformia Kretzoi, 1943
         Family Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters
           Subfamily Lutrinae Bonaparte, 1838 - otters
             Genus Lontra Gray, 1843
               Lontra canadensis (Schreber, 1777) - North American river otter
                 1 [Lontra canadensis canadensis] (Schreber, 1777)
                 2 Lontra canadensis kodiacensis (Goldman, 1935)
                 3 Lontra canadensis lataxina (Cuvier, 1823)
                 4 Lontra canadensis mira (Goldman, 1935)
                 5 Lontra canadensis pacifica (Allen, 1898)
                 6 Lontra canadensis periclyzomae (Elliot, 1905)
                 7 Lontra canadensis sonora (Rhoads, 1898)