1. Platyrrhini (New World Monkeys)
* Cebidae:
* Capuchin monkeys: Known for their intelligence and tool use (e.g., white-faced capuchin).
* Squirrel monkeys: Small and agile, often found in large groups.
* Titi monkeys: Small and slender, with long tails.
* Saimiri monkeys: Highly social and have distinctive white fur around their face.
* Aotidae:
* Night monkeys (Douroucoulis): The only nocturnal monkeys.
* Pitheciidae:
* Saki monkeys: Have a distinctive "topknot" of hair.
* Uakari monkeys: Reddish-faced monkeys with unique facial features.
* Titi monkeys: Similar to the Cebidae family's Titi monkeys, but belong to a different family.
* Atelidae:
* Howler monkeys: Known for their loud, booming calls.
* Spider monkeys: Long limbs and prehensile tails, excellent climbers.
* Woolly monkeys: Have thick, woolly fur.
2. Catarrhini (Old World Monkeys)
* Cercopithecidae: The largest family of monkeys.
* Colobinae: Leaf-eating monkeys with complex stomachs.
* Langurs: Found in Asia.
* Colobus monkeys: Found in Africa.
* Cercopithecinae: More diverse group, including:
* Baboon: Large, terrestrial monkeys with dog-like faces.
* Macaque: Widely distributed, including the famous Rhesus macaque.
* Guenon: A diverse group of African monkeys with vibrant colors.
* Mangabey: Known for their distinctive white facial markings.
* Proboscis monkey: Male monkeys have a large, fleshy nose.
Other Classifications:
* Size: Monkeys come in various sizes, from the tiny pygmy marmoset to the massive mandrill.
* Diet: Monkeys have diverse diets, ranging from fruit-eaters to leaf-eaters to omnivores.
* Habitat: Monkeys live in a variety of habitats, from rainforests to savannas to mountains.
Remember, this is a simplified overview. There are many more specific classifications and sub-classifications within the monkey world.