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 Catarrhini Geoffroy Saint-Hilaire, 1812
             Superfamily Hominoidea Gray, 1825
               Family Hylobatidae Gray, 1871 - gibbons
                 1 Genus Bunopithecus Matthew & Granger, 1925
                 2 Genus Hylobates Illiger, 1811 - gibbons
                 3 Genus Nomascus Miller, 1933
                 4 Genus Symphalangus Gloger, 1841