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 Cercopithecoidea Gray, 1821
               Family Cercopithecidae Gray, 1821 - Old World monkeys
                 Subfamily Colobinae Jerdon, 1867
                   01 Genus Colobus Illiger, 1811 - black and white colobus monkeys
                   02 Genus Nasalis Geoffroy Saint-Hilaire, 1812 - proboscis monkey
                   03 Genus Piliocolobus Rochebrune, 1887
                   04 Genus Presbytis Eschscholtz, 1821 - leaf monkeys
                   05 Genus Procolobus Rochebrune, 1887 - olive colobus monkey
                   06 Genus Pygathrix Geoffroy Saint-Hilaire, 1812 - douc langurs
                   07 Genus Rhinopithecus Milne-Edwards, 1872 - snub-nosed langurs
                   08 Genus Semnopithecus Desmarest, 1822 - Hanuman langur
                   09 Genus Simias Miller, 1903 - pig-tailed langur
                   10 Genus Trachypithecus Reichenbach, 1862 - brow-ridged langurs, leaf monkeys