IUCN threat status:

Critically Endangered (CR)


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Brown-headed spider monkey

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,[1] found in northwestern Ecuador.[2][3]

Its type locality is at 1500 m in the Hacienda Chinipamba, Imbabura Province in North-West Ecuador.[1] 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.[4]

The brown-headed spider monkey lives in tropical and subtropical humid forests that are between 100 and 1,700 metres (330 and 5,600 ft) above sea level. It lives in population densities of 1.2 monkeys per square kilometer.[2] 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.[2]


  1. ^ a b c Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. OCLC 62265494. ISBN 0-801-88221-4. 
  2. ^ a b c d Cuarón, A.D., Morales, A., Shedden, A., Rodriguez-Luna, E. & de Grammont, P.C. (2008). Ateles fusciceps ssp. fusciceps. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 2009-05-21.
  3. ^ Rylands, A., Groves, C., Mittermeier, R., Cortes-Ortiz, L., and 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. ^ Collins, A. (2008). "The taxonomic status of spider monkeys in the twenty-first century". In Campbell, C. Spider Monkeys. Cambridge University Press. pp. 50–67. ISBN 978-0-521-86750-4. 


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