Which groups of primates are included in the catarrhines?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Illustration comparing the body plans of representative anthropoids, showing a male western lowland gorilla, a male human, a male bonobo, a female Bornean orangutan, and male and female northern white-cheeked gibbons, all labeled and depicted to scale. — primate Representative apes (superfamily Hominoidea).

The infraorder Catarrhini (meaning "downward-nosed") is a major division of the Simiiformes infraorder, which includes the following groups of primates:

Old World monkeys: All members of the family Cercopithecidae.
Apes: Members of the superfamily Hominoidea, which includes the families Hylobatidae (gibbons) and Hominidae (great apes and humans).12

Catarrhines are distinguished from platyrrhines (New World monkeys) by their narrow noses with downward-facing nostrils, a thin nasal septum, and the presence of 32 teeth. Unlike some New World monkeys, catarrhines do not possess prehensile tails.342