Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Primates Linnaeus, 1758 - primates
       Suborder Haplorrhini Pocock, 1918 see Suborder Haplorhini Pocock, 1918
         Infraorder Simiiformes Haeckel, 1866
           Parvorder Platyrrhini Geoffroy Saint-Hilaire, 1812
             Family Atelidae Gray, 1825
               Subfamily Atelinae Gray, 1825
                 1 Genus Ateles Geoffroy Saint-Hilaire, 1806 - spider monkeys
                 2 Genus Brachyteles Spix, 1823 - woolly spider monkey, muriqui
                 3 Genus Lagothrix Geoffroy, 1812 - woolly monkeys
                 4 Genus Oreonax Thomas, 1927