Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
                 Order Rodentia Bowdich, 1821 - rodents
                   Suborder Sciuromorpha Brandt, 1855
                     Superfamily Castoroidea Batsch, 1788
                       Family Castoridae Batsch, 1788 - beavers
                         Genus Castor Linnaeus, 1758 - beavers
                           Castor fiber Linnaeus, 1758 - Eurasian beaver
                             Castor fiber albicus Matschie, 1907
                             Castor fiber birulai Serebrennikov, 1929
                             Castor fiber caecator Bangs, 1913
                             Castor fiber canadensis Kuhl, 1820 see Castor canadensis Kuhl, 1820
                             Castor fiber fiberᵀ Linnaeus, 1758
                             Castor fiber frondator Mearns, 1897
                             Castor fiber galliae Geoffroy, 1803
                             Castor fiber michiganensis Bailey, 1913
                             Castor fiber pohlei Serebrennikov, 1929
                             Castor fiber subauratus Taylor, 1912
                             Castor fiber vistulanus Matschie, 1907