<Li> Parvorder Platyrrhini: New World monkeys <Ul> <Li> Family Callitrichidae: marmosets and tamarins </Li> <Li> Family Cebidae: capuchins and squirrel monkeys </Li> <Li> Family Aotidae: night or owl monkeys (douroucoulis) </Li> <Li> Family Pitheciidae: titis, sakis, and uakaris </Li> <Li> Family Atelidae: howler, spider, woolly spider, and woolly monkeys </Li> </Ul> </Li> <Ul> <Li> Family Callitrichidae: marmosets and tamarins </Li> <Li> Family Cebidae: capuchins and squirrel monkeys </Li> <Li> Family Aotidae: night or owl monkeys (douroucoulis) </Li> <Li> Family Pitheciidae: titis, sakis, and uakaris </Li> <Li> Family Atelidae: howler, spider, woolly spider, and woolly monkeys </Li> </Ul> <Li> Family Callitrichidae: marmosets and tamarins </Li> <Li> Family Cebidae: capuchins and squirrel monkeys </Li>

Difference between old world and new world monkey