The platyrrhini are the living new world monkeys (living in South and Central America and southern Mexico), like the Howler Monkeys Squirrel Monkeys, Sakis, Uakaris, Capuchin Monkeys, Woolly Monkeys, Spider Monkeys, and their relatives. They are arboreal (living in trees) and herbivorous (plant-eaters). (The platyrrhini include the Family Cebidae and Family Callithricidae.)