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 Edentata Vicq-d'Azyr, 1792 see Order Xenarthra Cope, 1889
                   Suborder Xenarthra Cope, 1889 - xenarthrans see Magnorder Xenarthra Cope, 1889
                     Infraorder Pilosa Flower, 1883 - sloths see Order Pilosa Flower, 1883
                       Family Bradypodidae Batsch, 1788 - three-toed tree sloths
                         Genus Choloepus Illiger, 1811 - two-toed tree sloths
                           Choloepus didactylus (C. Linnaeus, 1758) - southern two-toed sloth
                           Choloepus hoffmanni Peters, 1858 - Hoffmann's two-toed sloth