Which subgroup of primates are typically classified as prosimians?

Prosimians represent one of the oldest lineages within the primate order and include species that are considered more primitive than monkeys and apes. Typically, this subgroup consists of lemurs, lorises, and tarsiers. Among these, lemurs are particularly well-known and serve as a classic example of prosimians. They often exhibit traits such as a reliance on smell, a nocturnal lifestyle, and a distinct set of social behaviors that set them apart from the more derived primates like monkeys and apes.

Understanding this classification helps highlight the evolutionary distinctions within primates. While monkeys, great apes, and New World monkeys do possess distinct characteristics and behaviors, they fall into other categories and are not classified as prosimians. Monkeys and apes are considered more derived primates, often exhibiting greater reliance on vision and more complex social structures compared to prosimians. This evolutionary framework is essential for understanding primate biology and behavior.