A subfamily of the Old World monkeys, CERCOPITHECIDAE, that inhabits the forests of Africa and Asia. The genera COLOBUS (Procolobus; colobus), Nasalis (proboscis monkey), Presbytis (Semnopithecus; leaf monkey), Pygathrix (Rhinopithecus; snub-nosed monkey), and Simias (pig-tailed langur) all belong to this subfamily.

The family of Old World monkeys and baboons consisting of two subfamilies: CERCOPITHECINAE and COLOBINAE. They are found in Africa and part of Asia.