The Hand of Cercopithecoides williamsi (Mammalia, Primates): Earliest Evidence for Thumb Reduction among Colobine Monkeys

• Stephen R. Frost ,

  * E-mail: sfrost@uoregon.edu

  Affiliation Department of Anthropology, 1218 University of Oregon, Eugene, Oregon, 97403–1218, United States of America

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• Christopher C. Gilbert,

  Affiliations Department of Anthropology, Hunter College of the City University of New York, New York, New York, 10065, United States of America, New York Consortium in Evolutionary Primatology, New York, New York, 10024, United States of America, PhD Program in Anthropology, The Graduate Center, City University of New York, New York, New York, 10016, United States of America

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• Kelsey D. Pugh,

  Affiliations New York Consortium in Evolutionary Primatology, New York, New York, 10024, United States of America, PhD Program in Anthropology, The Graduate Center, City University of New York, New York, New York, 10016, United States of America

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• Emily H. Guthrie,

  Affiliations Department of Anthropology, 1218 University of Oregon, Eugene, Oregon, 97403–1218, United States of America, Human Subjects Division, University of Washington, Seattle, Washington, 98185, United States of America

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• Eric Delson

  Affiliations New York Consortium in Evolutionary Primatology, New York, New York, 10024, United States of America, PhD Program in Anthropology, The Graduate Center, City University of New York, New York, New York, 10016, United States of America, Department of Vertebrate Paleontology, American Museum of Natural History, New York, New York, 10024, United States of America, Department of Anthropology, Lehman College, City University of New York, Bronx, New York, 10468, United States of America

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