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 Mustelinae Batsch, 1788 - weasels
             Genus Martes Pinel, 1792 - martens, fisher, and sable
               Martes foina (Erxleben, 1777) - beech marten
                 Martes foina intermedia (Severtzov, 1873)