Final answer:
The physical features that distinguish the four types of non-human primates: prosimians, New World Monkeys, Old World monkeys, and apes.
Step-by-step explanation:
The four types of non-human primates including prosimians, New World Monkeys, Old World monkeys, and apes can be distinguished based on several physical/anatomical features. Prosimians tend to be nocturnal, smaller in size, and have relatively smaller brains compared to anthropoids. New World Monkeys have broad, sideways-facing nostrils and prehensile tails. Old World monkeys have narrow, downward-pointing nostrils and non-prehensile tails. Apes, such as gibbons, chimpanzees, gorillas, orangutans, and humans, lack tails and are largely terrestrial.