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Orangutan, Sumatra (USNM 143600)
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 143600 (http://collections.mnh.si.edu/search/mammals/?irn=7251585), is an adult orangutan (Pongo abelii) from the island of Sumatra, Indonesia that was collected by W.L. Abbott at Aru Bay in 1906. This specimen weighed 80 lbs and measured a head to body length of 735 mm.
This is a CT scan of the right navicular of USNM 143600. 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.