Infraorder Platyrrhini Geoffroy Saint-Hilaire, 1812 see Parvorder Platyrrhini Geoffroy Saint-Hilaire, 1812
   Family Atelidae Gray, 1825
     Subfamily Atelinae Gray, 1825
       1.1 Genus Ateles Geoffroy Saint-Hilaire, 1806 - spider monkeys
       1.2 Genus †Caipora Cartelle & Hartwig, 1996
       2.1 Genus Alouatta Lacépède, 1799 - howler monkeys
       2.2 Genus †Stirtonia Hershkovitz, 1970
       2.3 Genus †Protopithecus Lund, 1838
       2.4 Genus †Paralouatta Rivero & Arredondo, 1991
       3 Genus Lagothrix Geoffroy, 1812 - woolly monkeys
       4 Genus Brachyteles Spix, 1823 - woolly spider monkey, muriqui