The Old World monkeys of Africa and Asia comprise approximately 132 species in the family Cercopithecidae. They exhibit striking diversity in habitat, distribution, diet, and social behavior.

Fossils of the oldest monkeys have been unearthed in Kenya, revealing the old-world monkeys coexisted with more archaic primates some 12.5 million years ago.

Ancient teeth of old-world monkeys, which are most closely related to humans, have now been unearthed, fossils 3 million years older than previous remains found to date, researchers say.

Old World monkeys. OK, so now that we know what a monkey is, exactly how many types of monkeys are there? “Monkeys are broadly divided into Old World species—160 species, and New World species ...

Old World monkeys have narrow, downward-facing nostrils, while New World monkeys have broader, side-facing nostrils. What are some of the most fascinating species of monkeys, and what makes them ...

Old World Monkeys. In T. Poole, & P. English (eds), The UFAW Handbook on the Care and Management of Laboratory Animals Seventh Edition (pp. 611-635) Oxford: Blackwell Science. Berman, C. M. (1980).

Among monkeys, scientists recognize two distinct evolutionary lineages: Old World monkeys (Cercopithecidae) and New World monkeys (Platyrrhini).

Old World monkeys, which live in Asia and Africa, have tails, but they are not prehensile. In length and gripping ability, spider monkeys and howler monkeys have an edge on capuchins.

Old World monkeys include macaques, baboons, mandrills, proboscis monkeys and langurs. Unlike many New World monkeys, Old World monkeys cannot use their tails for gripping.

However, humans and our closest primate relatives — the great apes — said farewell to tails about 25 million years ago, when the group split from Old World monkeys.

Ancient teeth of old-world monkeys, which are most closely related to humans, have now been unearthed, fossils 3 million years older than previous remains found to date, researchers say.