The other group of anthropoids consists of primates informally called apes (Figure 34.44). The ape group includes
(a) New World monkeys, such as spider monkeys (shown here), squirrel monkeys , and capuchins, have a prehensile tail (one adapted for grasping) and nostrils that open to the sides.
(b)Old World monkeys lack a prehensile tall, and their nostrils open downward this group includes macaques (shown here), mandrils, baboons, and rhesus monkeys