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• Domain: Eukaryota () - Whittaker & Margulis,1978 - eukaryotes
  • Kingdom: Animalia () - C. Linnaeus, 1758 - animals
    • Subkingdom: Bilateria () - (Hatschek, 1888) Cavalier-Smith, 1983
      • Branch: Deuterostomia () - Grobben, 1908
        • Infrakingdom: Chordonia () - (Haeckel, 1874) Cavalier-Smith, 1998
          • Phylum: Chordata () - Bateson, 1885 - Chordates
            • Subphylum: Vertebrata () - Cuvier, 1812 - Vertebrates
              • Infraphylum: Gnathostomata () - auct. - Jawed Vertebrates
                • Superclass: Tetrapoda () - Goodrich, 1930
                  • Class: Mammalia () - C. Linnaeus, 1758
                    • Subclass: Theriiformes () - (Rowe, 1988) M.C. McKenna & S.K. Bell, 1997
                      • Infraclass: Holotheria () - (Wible et al., 1995) M.C. McKenna & S.K. Bell, 1997
                        • Superlegion: Trechnotheria () - McKenna, 1975
                          • Legion: Cladotheria () - McKenna, 1975
                            • Sublegion: Zatheria () - McKenna, 1975
                              • Infralegion: Tribosphenida () - (McKenna, 1975) M.C. McKenna & S.K. Bell, 1997
                                • Supercohort: Theria () - (Parker & Haswell, 1897) M.C. McKenna & S.K. Bell, 1997
                                  • Cohort: Placentalia () - (Owen, 1837) M.C. McKenna & S.K. Bell, 1997
                                    • Magnorder: Epitheria () - (Mckenna, 1975) M.c. Mckenna & S.k. Bell, 1997
                                      • Superorder: Preptotheria () - (McKenna, 1975) McKenna, in Stucky & McKenna, in Benton, ed., 1993
                                        • Grandorder: Ferae () - (Linnaeus, 1758) McKenna, 1975
                                          • Order: Carnivora () - Bowdich, 1821
                                            • Suborder: Caniformia () - Kretzoi, 1943
                                              • Infraorder: Arctoidea () - Flower, 1869
                                                • Parvorder: Mustelida () - Tedford, 1976
                                                  • Family: Mustelidae () - (Fischer de Waldheim, 1817) Swainson, 1835
                                                    • Subfamily: Lutrinae ()
                                                      • Tribe: Lutrini ()
                                                        • Genus: Lontra () - Gray, 1843
                                                          • Specific name: canadensis
                                                            • Subspecies: periclyzomae
                                                              • Scientific name: - Lontra canadensis periclyzomae