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 Procolobus Rochebrune, 1887 - olive colobus monkey
         3 Genus Pygathrix Geoffroy Saint-Hilaire, 1812 - douc langurs
         4 Genus Simias Miller, 1903 - pig-tailed langur
         5 Genus Nasalis Geoffroy Saint-Hilaire, 1812 - proboscis monkey
         6 Genus Presbytis Eschscholtz, 1821 - leaf monkeys