Simian

Simian refers to the group of primates that includes both monkeys and apes. The term is derived from the Latin word "simia," which means "ape." Simians are characterized by their higher degree of intelligence and complex behavior compared to other animals. They are found in various parts of the world, including Africa, Asia, and the Americas.

Classification

Simians are divided into two main groups: New World monkeys and Old World monkeys. New World monkeys, also known as Platyrrhini, are found in South and Central America. They have prehensile tails and nostrils that are far apart. Old World monkeys, also known as Catarrhini, are found in Africa and Asia. They have non-prehensile tails and nostrils that are close together.

The Catarrhini group is further divided into two superfamilies: Cercopithecoidea and Hominoidea. The Cercopithecoidea superfamily includes Old World monkeys, while the Hominoidea superfamily includes apes and humans.

Characteristics

Simians have a number of distinctive characteristics. They have forward-facing eyes, which gives them good depth perception. They also have flexible limbs and opposable thumbs, which allow them to grasp and manipulate objects. Many simians are also known for their complex social structures and behaviors.

Evolution

The evolution of simians is a topic of ongoing research. It is believed that simians first appeared around 40 million years ago, during the Eocene epoch. The split between New World monkeys and Old World monkeys is thought to have occurred around 30 million years ago.

See also

• Primate
• Monkey
• Ape
• Evolution of primates

References

Simian Resources
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