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Siamang, Malaysia (USNM 171981)
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Siamangs are apes and one of our closest living relatives. The Smithsonian Institution’s Division of Mammals (http://vertebrates.si.edu/mammals/) houses many siamangs in its scientific collections.
This specimen, USNM 171981 (http://collections.mnh.si.edu/search/mammals/?irn=7260119), is a male siamang (Symphalangus syndactylus) from Malaysia. It was collected near Semangko Pass in Selangor of Pahang Province. This individual had a hind tarsus length of 168 mm, an ear notch length of 39 mm, and a head to body length of 610 mm.
This is a CT scan of the cranium of USNM 171981. 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.
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 relatives, the apes, available in 3D for education and research.