In addition to the tarsiers, the sub order Haplorrhini includes the 4 extent new world families and 3 old world families. New world anthropoids are monophyletic group, usually called the platyrrhine, that includes the marmmosets, tamarins, capuchins, and squirrel monkeys along with the 3 recently recognized families: Aotidae (night monkeys), Pitheciidae (titi, uakari, and saki monkeys), and the Atelidae (howler, spider, and woolly monkeys). The Catarrhini are and old world assemblage, including the family Cercopithecidae (macaque, baboons, mangabeys, and many other monkeys), as well as the Hylobatidae (gibbons and siamang) and the Hominidae.

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