Blackish squirrel monkey

Saimiri vanzolinii

SUBFAMILY

Cebinae

TAXONOMY

Saimiri vanzolinii Ayers, 1985, left bank of Lago Mamiraua, mouth of Rio Japura, Amazonas, Brazil.

OTHER COMMON NAMES English: Black squirrel monkey.

PHYSICAL CHARACTERISTICS

Fur is gray or black back with a black stripe; gray shoulders; yellow hands and forearms; Roman (rounded) arch over eyes. Head and body length is 10.8-12.6 in (27.5-32 cm). Tail length is 16.3-17.5 in (41.5-44.5 cm). Weight is 22.9-33.5 oz (650-950 g).

DISTRIBUTION

A small tract of 367 sq mi (950 sq km) in northeastern Brazil. HABITAT

Swamp and white-water flooded tropical moist forest. BEHAVIOR

Diurnal and arboreal. Multimale-multifemale groups of up to 50 animals.

FEEDING ECOLOGY AND DIET

Predominately eat fruit and animal prey including insects and spiders.

REPRODUCTIVE BIOLOGY

Promiscuous mating. Males become "fatted" with upper body weight gain, an increase in testes size, and active spermatogenesis just prior to the breeding season. Breeding season is followed six months later by a birth season (coinciding with the wet season) when food is most abundant. Births are single.

CONSERVATION STATUS

Smallest distribution of any squirrel monkey. Main pressures on populations include habitat degradation and deforestation. Listed as Vulnerable by the IUCN.

SIGNIFICANCE TO HUMANS None known. ♦

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