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Orangutan, Borneo (USNM 145304)
Orangutans are great apes and one of our closest living relatives. The Smithsonian Institution’s Division of Mammals (http://vertebrates.si.edu/mammals/) houses many orangutans in its scientific collections.
This specimen, USNM 145304 (http://collections.mnh.si.edu/search/mammals/?irn=7252517), is a adult male orangutan from the island of Borneo, Indonesia (Pongo pygmaeus). It was collected by W.L. Abbot in 1907 near the Sungaei Matan steam of the Semandong River. This male weighed 185 lbs.
This is a CT scan of the mandible of USNM 145304. 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 (http://smithsonian20.si.edu/fund.html), and the Smithsonian Collections Care and Preservation Fund.