Difference between new world monkey and old world monkey

New World monkeys (Platyrrhini) and Old World monkeys (Cercopithecidae) are two distinct groups of primates that differ in several ways. Here are some of the main differences:

Geographic Distribution:

• New World monkeys are found in the tropical forests of Central and South America, from Mexico to Argentina.
• Old World monkeys are found in Africa and Asia, from the Mediterranean to India and Southeast Asia.

Physical Characteristics:

• New World monkeys have a more primitive skull shape, with a flat face and a shorter, broader nose.
• Old World monkeys have a more advanced skull shape, with a longer, more pointed nose and a more prominent forehead.
• New World monkeys have a smaller body size, with most species weighing between 3-6 kg (6.6-13.2 lbs).
• Old World monkeys are generally larger, with some species weighing up to 30 kg (66 lbs) or more.

Diet:

• New World monkeys are primarily frugivores, with a diet consisting mainly of fruits, leaves, and flowers.
• Old World monkeys are more omnivorous, with a diet that includes fruits, leaves, insects, and small animals.

Social Structure:

• New World monkeys typically live in small groups, usually consisting of a few individuals, and are known for their complex social dynamics.
• Old World monkeys often live in larger groups, with a more hierarchical social structure.

Tail:

• New World monkeys have a prehensile tail, which they use as an additional limb to grasp branches.
• Old World monkeys do not have a prehensile tail, but some species have a long, thin tail that they use for balance.

Brain Size:

• New World monkeys have relatively smaller brain-to-body mass ratios compared to Old World monkeys.
• Old World monkeys have larger brain-to-body mass ratios, which may be related to their more complex social behavior and problem-solving abilities.

Evolutionary History:

• New World monkeys evolved from a common ancestor that lived around 35-40 million years ago.
• Old World monkeys evolved from a common ancestor that lived around 25-30 million years ago.

Behavior:

• New World monkeys are known for their agility and ability to move quickly through the forest canopy.
• Old World monkeys are more terrestrial and often live in trees, but are not as agile as New World monkeys.

These are just a few of the key differences between New World monkeys and Old World monkeys. Both groups are fascinating and have evolved unique adaptations to their environments.