About the Authors

Paul C. Sereno

dinosaur@uchicago.edu

Affiliation Department of Organismal Biology and Anatomy, University of Chicago, Chicago, Illinois, United States of America

Ricardo N. Martinez

Affiliation Museo de Ciencias Naturales, San Juan, Argentina

Jeffrey A. Wilson

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

David J. Varricchio

Affiliation Department of Earth Sciences, Montana State University, Bozeman, Montana, United States of America

Oscar A. Alcober

Affiliation Museo de Ciencias Naturales, San Juan, Argentina

Hans C. E. Larsson

Affiliation Redpath Museum, McGill University, Montreal, Quebec, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Involved in writing sections of the paper: PCS, RNM, JAW, DJV, OAA, HCEL. Participants in the fieldwork: PCS, RNM, JAW, DJV, OAA, HCEL.