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Diademed Sifaka, Madagascar (USNM 63347)
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 63347 (http://collections.nmnh.si.edu/search/mammals/?irn=7232012), is a female diademed sifaka (Propithecus diadema) from Madagascar. This individual was collected in 1895 by William Abbott near Mahanoro in Toamasina Province. This specimen weighed 6.4 kg, measured a total length of 1041 mm, a tail length of 508 mm, and a head to body length of 533 mm.
This is a CT scan of the cranium of USNM 63347. 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.