found: Britannica, viewed August 24, 2023(monkey, in general, any of nearly 200 species of tailed primate, with the exception of lemurs, tarsiers, and lorises; the presence of a tail (even if only a tiny nub), along with their narrow-chested bodies and other features of the skeleton, distinguishes monkeys from apes; monkeys are arranged into two main groups: Old World and New World; Old World monkeys all belong to one family, Cercopithecidae, which is related to apes and humans, and together they are classified as catarrhines (meaning "downward-nosed" in Latin); New World monkeys are the platyrrhines ("flat-nosed"), a group comprising five families)
