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Brown-headed spider monkey
A. fusciceps fusciceps at Ecuador
Conservation status
Critically Endangered  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Primates
Suborder:	Haplorhini
Infraorder:	Simiiformes
Family:	Atelidae
Genus:	Ateles
Species:	A. fusciceps
Subspecies:	A. f. fusciceps
Trinomial name
Ateles fusciceps fusciceps (Gray, 1866)

The brown-headed spider monkey (Ateles fusciceps fusciceps) is a critically endangered subspecies of the black-headed spider monkey, a type of New World monkey, found in northwestern Ecuador.

Its type locality is at 1500 m in the Hacienda Chinipamba, Imbabura Province in North-West Ecuador. It inhabits areas west of the Andes Mountains. Some authorities, such as Froelich (1991), Collins and Dubach (2001) and Nieves (2005), do not recognize the black-headed spider monkey as a distinct species and so treat the brown-headed spider monkey as a subspecies of Geoffroy's spider monkey.

The brown-headed spider monkey lives in tropical and subtropical humid forests that are between 100 and 1,700 metres (330 and 5,580 ft) above sea level. It lives in population densities of 1.2 monkeys per square kilometer. It has a black or brown body and a brown head, while the Colombian spider monkey (A. f. rufiventris) is entirely black with some white on its chin.

The brown-headed spider monkey is critically endangered as a result of habitat loss, due to deforestation, and hunting.

References

1. ^ Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press. ISBN 0-801-88221-4. OCLC 62265494.
2. ^ Moscoso, P.; Cortes-Ortíz, L.; Link, A.; Shanee, S.; de la Torre, S. (2020). "Ateles fusciceps ssp. fusciceps". IUCN Red List of Threatened Species. 2020: e.T39922A17979888. Retrieved 17 August 2020.
3. Rylands, A.; Groves, C.; Mittermeier, R.; Cortes-Ortiz, L. & Hines, J. (2006). "Taxonomy and Distributions of Mesoamerican Primates". New Perspectives in the Study of Mesoamerican Primates. pp. 56–66. ISBN 0-387-25854-X.
4. de la Torre, Stella (2014). Primate Tourism: A Tool for Conservation?. p. 245. ISBN 9781316060766. Retrieved 28 June 2016.
5. Collins, A. (2008). "The taxonomic status of spider monkeys in the twenty-first century". In Campbell, C. (ed.). Spider Monkeys. Cambridge University Press. pp. 50–67. ISBN 978-0-521-86750-4.
6. Cervera, Laura & Griffith, Daniel M. (March 2016). "New Population and Range Extension of the Critically Endangered Ecuadorian Brown-Headed Spider Monkey (Ateles Fusciceps Fusciceps) in Western Ecuador". Tropical Conservation Science. 9 (1): 167–177. doi:10.1177/194008291600900109.

• IUCN Red List critically endangered species
• Mammals of Ecuador
• Spider monkeys
• Mammals described in 1866
• Taxa named by John Edward Gray