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What are the 3 groups (infraorders) of Haplorrhines + examples of primates in each group. When did these groups split apart from each other (meaning, when did they last share a common ancestor)?

Question

What are the 3 groups (infraorders) of Haplorrhines + examples of primates in each group. When did these groups split apart from each other (meaning, when did they last share a common ancestor)?

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Solution

The Haplorrhines, also known as the "dry-nosed" primates, are divided into three infraorders: Tarsiiformes, Simiiformes (or Anthropoidea), and Platyrrhini.

  1. Tarsiiformes: This group includes the Tarsiers. Tarsiers are small primates found primarily in Southeast Asia, including the Philippines, Borneo, and Sumatra.

  2. Simiiformes (Anthropoidea): This group includes the Old World monkeys and apes, and humans. Examples include the Rhesus Monkey, Gorillas, and Humans.

  3. Platyrrhini: This group includes the New World monkeys. Examples include the Capuchin Monkey, Howler Monkey, and Spider Monkey.

As for when these groups split apart from each other, it's believed that the Tarsiiformes split from the other groups around 58-63 million years ago. The Simiiformes and Platyrrhini split from each other around 40 million years ago. These dates are based on molecular data and fossil records.

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