Red-Shanked Douc Langur, Vietnam (USNM 356574)

USNM 356574

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 356574 (, is a female red-shanked douc langur (Pygathrix nemaeus) from Vietnam. This individual was collected in 1966 by P.F. Ryan near Mount Sontra in Da Nang Province. This specimen weighed 18 lbs, measured a total length of 1,100 mm, a tail length of 580 mm, a hind tarsus length of 183 mm and an ear notch length of 35 mm.

This is a CT scan of the cranium of USNM 356574. 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.