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Orangutan, Borneo (USNM 296650)
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 296650 (http://collections.mnh.si.edu/search/mammals/?irn=7303602), is a male orangutan from the island of Borneo, Indonesia (Pongo pygmaeus), collected in 1952. The specimen had a head to body length of 714 mm and a hind tarsus length of 71 mm. The ear notch length measured at 30 mm.
This is a CT scan of the mandible of USNM 296650. 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.