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Siamang, Indonesia (USNM 141161)
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 141161 (http://collections.mnh.si.edu/search/mammals/?irn=7250606), is a female siamang (Symphalangus syndactylus) from Indonesia. This individual was collected by William Abbott near Tarussan Bay on the island of Sumatra. This adult weighed 26 lbs and had a total length of 570 mm. The hind tarsus length was 169 mm and the head to body length was 510 mm.
This is a CT scan of the mandible of USNM 141161. 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.