Class Mammalia Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Cercopithecidae Gray, 1821 - Old World monkeys
       Subfamily Colobinae Jerdon, 1867
         1 Genus Colobus Illiger, 1811 - black and white colobus monkeys
         2 Genus Nasalis Geoffroy Saint-Hilaire, 1812 - proboscis monkey
         3 Genus Presbytis Eschscholtz, 1821 - leaf monkeys
         4 Genus Procolobus Rochebrune, 1887 - olive colobus monkey
         5 Genus Pygathrix Geoffroy Saint-Hilaire, 1812 - douc langurs
         6 Genus Semnopithecus Desmarest, 1822 - Hanuman langur
         7 Genus Trachypithecus Reichenbach, 1862 - brow-ridged langurs, leaf monkeys