Platyrrhini, commonly known as New World monkeys, are a group of primates found primarily in Central and South America. They are characterized by their flat noses, which have nostrils that are widely spaced. This group includes species such as the capuchin monkey, howler monkey, and squirrel monkey. These monkeys typically have prehensile tails, allowing them to grasp branches while navigating their arboreal habitats. Platyrrhini are known for their social structures and vocalizations, which vary among species. They play a crucial role in their ecosystems, contributing to seed dispersal and forest regeneration.