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
Genus Pygathrix Geoffroy Saint-Hilaire, 1812 - douc langurs
Pygathrix nemaeus (C. Linnaeus, 1771) - douc langur