Order Primates Linnaeus, 1758 - primates
   Semiorder Euprimates Hoffstetter, 1978 see Clade Euprimates
     Suborder Haplorhini Pocock, 1918
       Hyporder Anthropoidea Mivart, 1864 see Infraorder Simiiformes Haeckel, 1866
         Infraorder Platyrrhini Geoffroy Saint-Hilaire, 1812 [monotypic] see Parvorder Platyrrhini Geoffroy Saint-Hilaire, 1812
           Superfamily Ateloidea Gray, 1825
             Family Atelidae Gray, 1825
               Subfamily Atelinae Gray, 1825
                 Tribe Alouattini Trouessart, 1897 see Subfamily Alouattinae (Trouessart, 1897) Elliot, 1904
                   1 Genus Alouatta Lacépède, 1799 - howler monkeys
                   2 Genus †Stirtonia Hershkovitz, 1970
                   3 Genus †Protopithecus Lund, 1838
                   4 ?Genus ‡Paralouatta Rivero & Arredondo, 1991