The northern buffed-cheeked gibbon (Nomascus annamensis) is a species of crested gibbon which is found in Vietnam, Cambodia, and Laos. Its habitat is in the humid subtropical and seasonal tropical forests of these countries.
Description The northern buffed-cheeked gibbon resembles Nomascus gabriellae in appearance.Thinh, Van Ngoc, Alan R. Mootnick, Vu Ngoc Thanh, Tilo Nadler and Christian Roos, Van Ngoc Thinh, Alan R. Mootnick, Vu Ngoc Thanh, Tilo Nadler and Christian Roos. "A new species of crested gibbon, from the central Annamite mountain range". Vietnamese Journal of Primatology. Vol 1. No. 4. Males and females of N. annamensis differ in morphology and color. The male has a primarily black pelt that glistens silver in sunlight, with a lighter brown chest. The cheeks are a deep golden-orange, and the crest is very prominent. The female, though, lacks the characteristic crest and is orange-beige in color.
The holotype is located in the Zoological Museum of the Vietnam National University.
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