About the Authors

Jens L. Franzen

Affiliations Forschungsinstitut Senckenberg, Frankfurt, Germany, Naturhistorisches Museum Basel, Basel, Switzerland

Philip D. Gingerich

Affiliation Museum of Paleontology and Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan, United States of America

Jörg Habersetzer

Affiliation Forschungsinstitut Senckenberg, Frankfurt, Germany

Jørn H. Hurum

j.h.hurum@nhm.uio.no

Affiliation Natural History Museum, University of Oslo, Oslo, Norway

Wighart von Koenigswald

Affiliation Steinmann-Institut für Geologie, Mineralogie und Paläontologie, Universität Bonn, Bonn, Germany

B. Holly Smith

Affiliation Museum of Anthropology, University of Michigan, Ann Arbor, Michigan, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JH. Performed the experiments: JH. Analyzed the data: JLF PDG JH JHH WvK BHS. Wrote the paper: JLF PDG JHH WvK BHS.