Class [Mammalia] Linnaeus, 1758 - mammals Order Primates Linnaeus, 1758 - primates Family Cercopithecidae Gray, 1821 - Old World monkeys Subfamily Colobinae Jerdon, 1867 Genus Simias Miller, 1903 - pig-tailed langur Simias concolor Miller, 1903 - pig-tailed langur