At least seven monkey species are native to Central America. An eighth species, the Coiba Island howler (Alouatta coibensis) is often recognized, but some authorities treat it as a subspecies of the mantled howler, (A. palliata). A ninth species, the black-headed spider monkey (Ateles fusciceps)is also often recognized, but some authorities regard it as a subspecies of Geoffroy's spider monkey (A. geoffroyi).Taxonomically, all Central American monkey species are classified as New World monkeys, and they belong to four families. Five species belong to the family Atelidae, which includes the howler monkeys, spider monkeys, woolly monkeys and muriquis. Two species belong to the family Cebidae, the family that includes the capuchin monkeys and squirrel monkeys. One species each belongs to the night monkey family, Aotidae, and the tamarin and marmoset family, Callitrichidae.
Geoffroy's spider monkey is the only monkey found in all seven Central American countries, and it is also found in Colombia, Ecuador and Mexico. Other species that have a widespread distribution throughout Central America are the mantled howler, which is found in five Central American countries, and the white-headed capuchin (Cebus capucinus), which is found in four Central American countries. The Coiba Island howler, the black-headed spider monkey, the Panamanian night monkey (Aotus zonalis) and Geoffroy's tamarin (Saguinus geoffroyi) are each found in only one Central American country, Panama. The Central American squirrel monkey (Saimiri oerstedii) also has a restricted distribution, living only on part of the Pacific coast of Costa Rica and a small portion of Panama.El Salvador is the Central American country with the fewest monkey species, as only Geoffroy's spider monkey lives there. Panama has the most species, eight, as the only Central American monkey species that does not include Panama within its range is the Guatemalan black howler (Alouatta pigra).