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Lemurs are primates and are more closely related to humans, apes and monkeys than any other living nonhuman primate group. The Smithsonian Institution’s Division of Mammals (http://vertebrates.si.edu/mammals/) houses many lemurs in its scientific collections.

This specimen, USNM A22462 (http://collections.nmnh.si.edu/search/mammals/?irn=7423399) is a ring-tailed lemur (Lemur catta) from Madagascar. It was collected by Dr. Beauregard.

This is a CT scan of the mandible of USNM A22462 . 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 nonhuman primate relatives available in 3D for education and research.

These slides can be used for educational purposes only. For all other uses, please contact the Human Origins Program at

HO-PhotoRequest@si.edu or HumanOrigins@si.edu