The northern buffed-cheeked gibbon (Nomascus annamensis) is a newly discovered 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.[1] [2]
The northern buffed-cheeked gibbon resembles Nomascus gabriellae in appearance.[3] 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.