- any of several tropical American monkeys of the genus Ateles, having a slender body, long, slender limbs, and a long, prehensile tail: some are endangered.
- any of several arboreal New World monkeys of the genus Ateles, of Central and South America, having very long legs, a long prehensile tail, and a small head
- a rare related monkey, Brachyteles arachnoides, of SE Brazil
