Final answer:
Cebidae is a family of New World monkeys that includes marmosets and tamarins. They have prehensile tails and form pair bonds to raise their young.
Step-by-step explanation:
Cebidae is a family of New World monkeys that includes marmosets and tamarins. These arboreal mammals have prehensile tails which they use for grasping branches. Marmosets are very small primitive monkeys, while tamarins are squirrel-sized monkeys. They form pair bonds and cooperatively raise their young. Cebidae is part of the larger group of primates called Haplorrhini, which also includes humans.