Class Mammalia Linnaeus, 1758 - mammals Order Primates Linnaeus, 1758 - primates Family Cebidae Bonaparte, 1831 - New World monkeys Subfamily Atelinae Gray, 1825 Genus Brachyteles Spix, 1823 - woolly spider monkey, muriqui Brachyteles arachnoides (É. Geoffroy Saint-Hilaire, 1806) - woolly spider monkey