Linked from
The 18 pages that link to Old World monkey, each with the reason it gives.
PrimateBroader topic: Their diversity includes terrestrial baboons and arboreal colobus monkeys.
ColobinaeNarrower topic: Colobines are one of the two major living subfamilies of Old World monkeys.
GeladaNarrower topic: Geladas are Old World monkeys, distinct from New World monkeys and apes.
BaboonNarrower topic: Baboons belong to this broader primate group.
Macaca fascicularisNarrower topic: This broader primate group includes Macaca fascicularis.
SemnopithecusNarrower topic: Semnopithecus is part of the broader catarrhine monkey radiation.