[1] CUNY, Program Anthropol, Grad Ctr, New York, NY USA
[2] New York Consortium Evolutionary Primatol NYCEP, New York, NY USA
[3] CUNY, Dept Anthropol, Hunter Coll, New York, NY USA
[4] Amer Museum Nat Hist, Div Paleontol, New York, NY USA
[5] Univ Illinois, Dept Anthropol, Chicago, IL USA
[6] Natl Museums Kenya, Dept Earth Sci, Nairobi, Kenya
[7] Penn State Univ, Dept Geosci, University Pk, PA USA
[8] Amer Museum Nat Hist, Div Anthropol, Nairobi, Kenya