Black-Shanked Douc Langur, Vietnam (USNM 257998)

USNM 257998

Old World monkeys are primates and are more closely related to humans and apes than any other living nonhuman primate group. The Smithsonian Institution’s Division of Mammals ( houses many Old World monkeys in its scientific collections. 

This specimen, USNM 257998 (, is a female black-shanked douc langur (Pygathrix nemaeus nigripes) from Vietnam. This individual was collected in 1932 by M. Poilane in Bien Hoa in Dong Nai. This specimen measured 1150 mm in total length with a tail length of 650 mm, an hind tarsus length of 182 mm, and an ear notch length of 32 mm.

This is a CT scan of the mandible of USNM 257998. These three-dimensional scans are made publicly available through the generous support of the Smithsonian 2.0 Fund, provided from the annual gifts of the Smithsonian National Board to the Secretary to use at his discretion (, and the Smithsonian Collections Care and Preservation Fund.

The main goal of this joint initiative between the Human Origins Program and the Division of Mammals is to make the NMNH's scientific collections of our closest living nonhuman primate relatives available in 3D for education and research.