About the Authors

Sebastián Apesteguía

Affiliation Área de Paleontología. Fundación de Historia Natural 'Félix de Azara', CEBBAD, Univ. Maimónides, Buenos Aires, Argentina

Nathan D. Smith

Affiliation Dinosaur Institute, Natural History Museum of Los Angeles County, Los Angeles, United States of America

Rubén Juárez Valieri

Affiliation Secretaría de Cultura, Gobierno de la Provincia de Río Negro, General Roca, Argentina

Peter J. Makovicky

pmakovicky@fieldmuseum.org

Affiliation Section of Earth Sciences, Integrative Research Center, Field Museum of Natural History, Chicago, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SA NDS PJM. Performed the experiments: SA NDS PJM. Analyzed the data: NDS PJM. Contributed reagents/materials/analysis tools: SA NDS RJV PJM. Wrote the paper: SA NDS PJM.