Start studying New World Monkeys vs Old World Monkeys. There are around 100 species of New World Monkeys divided into the four families. Unlike most Old World monkeys, many New World monkeys form monogamous … Diet. New World monkeys have round nostrils facing to the side. Learn vocabulary, terms, and more with flashcards, games, and other study tools. New World monkeys have flatter, wider noses with side-facing nostrils, 12 pre-molar teeth and prehensile tails and lack 3-colour vision. ADVERTISEMENTS: Difference between New World Monkey and Old World Monkey are stated below: Related posts: Difference between Metatheria and Eutheria Notes on Arboreal (tree-dwelling) and Aerial (Volant or flying) Adaptations The story of the Clever Monkey 233 Words Essay on the Autobiography of a caged Monkey Short Moral story on The Monkey and the Crocodile Old World monkey genera include baboons (genus Papio) and macaques (genus Macaca)'. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Start studying New world monkeys vs old world monkeys. The New World Monkeys are divided into two families and four subfamilies of primates that are found in Central and South America: Cebidae, Aotidae, Pitheciidae and Atelidae. New World Monkeys. Old World monkeys have narrow noses with downward-facing nostrils, 8 pre-molar teeth, their tails are not prehensile and they have colour vision. Many New World monkeys in the family Atelidae, which includes howler monkeys, spider monkeys and woolly monkeys, have grasping tails often with a bare tactile pad. Most Old World monkeys have tails, but they are not necessarily used as an extra limb, like New World monkeys use theirs; some Old World monkeys have barely any tail at all, as is the case with the aforementioned Barbary macaque. Many New World monkeys are small and almost all are arboreal, so knowledge of them is less comprehensive than that of the more easily observed Old World monkeys. The dental formula of the larger New World monkeys includes 3 premolars. Common names for other Old World monkeys include the talapoin , guenon , colobus , douc (douc langur, genus Pygathrix ), vervet , gelada , mangabey (a group of genera), langur , mandrill , surili ( Presbytis ), patas , and proboscis monkey . Primates are omnivorous, … Old World monkeys have 2.