Red-Tailed Monkey, Kenya (USNM 182355)

USNM 182355

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 182355 (, is a female red-tailed monkey (Cercopithecus ascanius schmidti) from Kenya. This individual was collected in 1912 by Edmund Heller near Kaimosi in Kisumu District of Nyanza.

This is a CT scan of the mandible of USNM 182355. 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.