Education

Difference Between Old World Monkeys and New World Monkeys

Main difference

Monkeys are dry-nosed primates called haplorhines. Monkeys belong to the paraphyletic group, usually have a tail, and consist of more than 260 known living species. Some of the species live in trees, while others live on the ground like baboons. Monkeys are considered to be intelligent, especially old world monkeys. The Old World monkeys and the New World monkeys are families of primates. Both Old World and New World monkeys differ in many ways such as Old World monkeys are found in Africa and Asia while New World monkeys are found in South and Central America.

Old World Monkeys

Old world monkeys are found in Asia and Africa. They live in a variety of environments, from savannah to rainforest, mountainous terrain, and scrubland. Old world monkeys are closer to man because they have a better developed brain, small pinnae, rods and cones in the retina, sensitive fingertips, menstruation, continuous spermatogenesis, and well-developed facial muscles for expressing emotion through facial gestures. Most Old World monkeys are at least partially omnivorous, but prefer the plant matter that makes up the bulk of their diet. These monkeys have cheek pouches, a raised nose with a narrow intranasal septum, and downward-facing nostrils (catharrine). This type of nasal feature is also shared by humans and apes. Old World monkeys have tails, but their tails lack prehensile features. Old World monkeys have sitting pads near their tails, this densely calloused region helps primates sit in trees to sleep, feed, and rest. Old World monkeys have well-developed finger and toenails and their thumbs are more opposable and resemble the human thumb. Old World monkeys rarely get involved in caring for their young. Old World monkeys have well-developed finger and toenails and their thumbs are more opposable and resemble the human thumb. Old World monkeys rarely get involved in caring for their young. Old World monkeys have well-developed finger and toenails and their thumbs are more opposable and resemble the human thumb. Old World monkeys rarely get involved in caring for their young.

New World Monkeys

New World monkeys are found in South and Central America and are confined to their arboreal habitat. New World monkeys are small to medium-sized primates. New World monkeys consist exclusively of arboreal (tree-dwelling) species such as spider monkeys, capuchins, marmosets, and tamarins. These monkeys have a flat nose with a wide nasal septum (platyrrhine) and also lack cheek pouches. His nostrils point forward. New World monkeys have tails with a prehensile characteristic, which means that they can use their tails to grasp or grasp different objects. Also, their tails help them eat as well as move through the trees because their tails provide them with balance and support. New World monkeys have claws on their fingers, except in the great toes of tamarins and marmosets. The thumb orientation of these monkeys is on the line with other digits, it opposes the next digit in a scissor-like grip. New World monkeys lack thick, calloused sitting pads (ischial callosities). The monkeys of the new world are involved in the care of their babies.

Key differences

  1. Old World monkeys are found in Asia and Africa, while New World monkeys are found in South and Central America.
  2. Old world monkeys live in a variety of environments such as savannah, rainforests while new world monkeys live in their arboreal (tree-dwelling) habitat.
  3. Old World monkeys have a raised nose with a narrow intranasal septum and downward-facing nostrils, while New World monkeys have a flat nose with a wide intranasal septum and forward-facing nostrils.
  4. Old World monkeys have cheek pouches, while New World monkeys lack cheek pouches.
  5. Old World monkeys are rarely involved in child care, while New World monkeys are involved in caring for their babies.

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