Primates are an order under the class Mammalia, with a total of 2 suborders, 16 families, approximately 78 genera and 514 species. The size of primates varies greatly, from the Belvedere's lemur weighing only 30 grams to the eastern gorilla weighing up to 200 kilograms. The brain is developed; the eye sockets face forward and the orbital distance is narrow; the fingers of the hands and feet are separated, the thumbs are flexible, and most of them can be grasped with other fingers. Compared