The term “New World monkeys” refers to species of monkeys found in Mexico, Central, and South America. These monkeys live mostly in the trees, and some never come to the ground. Unlike Old World monkeys, some species of New World monkeys have prehensile tails, meaning they are able to hang by their tail or use their tail as a third hand. They also have scent glands and rely more on scent-marking than Old World monkeys.
Some species (marmosets and tamarins) give birth to twins, rather than a single offspring. It is common for males to help with infant care, such as by carrying the infant on their back, which is otherwise rare in non-human primates.
Other Examples of New World Monkeys:
Squirrel monkey, howler monkey, spider monkey, marmoset, tamarin