Class [Mammalia] Linnaeus, 1758 - mammals Order Primates Linnaeus, 1758 - primates Family Cebidae Bonaparte, 1831 - New World monkeys Genus Alouatta Lacépède, 1799 - howler monkeys Alouatta fusca (É. Geoffroy Saint-Hilaire, 1812) - brown howler see Alouatta guariba guariba (Humboldt, 1812)