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 Primates Linnaeus, 1758 - primates
                   Suborder Simiae see Parvorder Anthropoidea Mivart, 1864
                     Infraorder Platyrrhina see Superfamily Callitrichoidea Gray, 1821
                       Superfamily Ceboidea Bonaparte, 1831
                         Family Cebidae Bonaparte, 1831 - New World monkeys
                           Subfamily Alouattinae (Trouessart, 1897) Elliot, 1904
                             Genus Alouatta Lacépède, 1799 - howler monkeys
                               Alouatta villosa (Gray, 1845) - Guatemalan howler see Alouatta pigra Lawrence, 1933