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Surili, Indonesia (USNM 104845)

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 104845 ( is a female surili (Presbytis natunae) from Natuna Island, Indonesia. This individual was collected in 1900 by William Abbott near the Kepulauan Riau Province in Bunguran. This specimen weighed 11.5 lbs and measured 1,104 mm in total length. The tail measured 660 mm and a head to body length of 444.5 mm.

This is a CT scan of the cranium of USNM 104845. 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.