Class [Mammalia] Linnaeus, 1758 - mammals Order Primates Linnaeus, 1758 - primates Family Cercopithecidae Gray, 1821 - Old World monkeys Subfamily Cercopithecinae Gray, 1821 Genus Cercopithecus Linnaeus, 1758 - guenons Cercopithecus erythrogaster Gray, 1866 - red-bellied monkey