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Conservation International. 1919 M Street, NW, Suite 600, Washington, DC 20036 United States. Phone: (202) 9121000; 1 (800) 406-2306. Web site: <http://www.conservation .org>

Primate Center Library, Wisconsin Primate Research Center. 1200 Capitol Court, Madison, WI 53715-1299 United States. Phone: (608) 263-3512. Fax: (608) 263-4031. E-mail: [email protected] Web site: <http://www.primate>

World Wildlife Federation (WWF)—The Conservation Organization. 1250 24th Street NW, Washington, DC 20037-1193 United States. Phone: (202) 293-4800. Fax: (202) 293-9211. Web site: <>

Brian W. Grafton, PhD

Howler monkeys and spider monkeys


Class Mammalia

Order Primates


Suborder Anthropoidea

i\\ / V ^

Family Atelidae

Thumbnail description


The largest New World monkeys, possess

i „, . :' •

prehensile tails; range in color from pale blonde

and light gray to black; some have completely

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black faces, others have pink and white facial

j \



Ateles: head and body length 15-25 in (38-64

\ )

cm), tail length 20-35 in (51-89 cm), 13.2 lb

\ /

(6 kg). Brachyteles: head and body length:


18-25 in (46-64 cm), tail length 23-36 in

^H V

(59-92 cm), 15.4-33 lb (7-15 kg); Alouatta:

fl W^F

head and body length 22-36 in (56-92 cm), tail

length 20-35 in (51-89 cm), 8.8-22 lb (4-10

/ )

kg). Lagothrix: head and body length: 20-35 in


(51-69 cm), tail length 23-28 in (59-72 cm),

12-24 lb (5.5-10.8 kg)

) r

Number of genera, species

L y

5 genera; 22-24 species



f r

Gallery forest, deciduous and semi-deciduous

rainforest, some species also found in

mangrove swamps or secondary forest Conservation status

Critically Endangered: 3 species; Endangered: 3 species; Vulnerable: 5


Mexico through Central and South America

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