Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Class Mammalia Linnaeus, 1758 - mammals
       Order Carnivora Bowdich, 1821 - carnivores
         Suborder Fissipedia (Blumenbach, 1791) see Order Carnivora Bowdich, 1821
           Family Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters
             Genus Lutra Brisson, 1762 - river otters
               Lutra lutra (Linnaeus, 1758) - European otter