Langur, Thailand (USNM 307737)

USNM 307737

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 307737 (, is a male Phayre’s langur (Trachypithecus phayrei crepusculus) from Thailand. This individual was collected in 1955 by Richard Elbel near Tambon Kok Saton in Amphoe Dan Sai District of Loei Province. This male had a tail length of 700 mm, a hind tarsus length of 160 mm, and an ear notch length of 35 mm.

This is a CT scan of the cranium of USNM 307737. 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.