[1] Univ Maryland, Dept Anthropol, College Pk, MD 20742 USA
[2] Smithsonian Inst, Dept Anthropol, Program Human Ecol & Archaeobiol, Natl Museum Nat Hist, Washington, DC 20013 USA
[3] Smithsonian Conservat Biol Inst, Ctr Conservat & Evolutionary Genet, Washington, DC 20013 USA
[4] Smithsonian Inst, Dept Vertebrate Zool, Natl Museum Nat Hist, Washington, DC 20013 USA