Two distinct families of cercopithecoids are usually distinguished: crown cercopithecoids are classified into a single family, Cercopithecidae, with two distinct subfamilies (
Colobinae and Cercopithecinae), distinguished at the family level by some authors (e.g., Jablonski, 2002); whereas stem cercopithecoids are classified into another, extinct family (the Victoriapithecidae).