About the Authors

Juan L. Cantalapiedra

jlopezcant@gmail.com

Affiliation Departamento de Paleobiología, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain

Manuel Hernández Fernández

Affiliations Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain, Departamento de Cambio Ambiental, Instituto de Geociencias (UCM-CSIC), Madrid, Spain

Jorge Morales

Affiliation Departamento de Paleobiología, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JLC MHF. Performed the experiments: JLC. Analyzed the data: JLC MHF. Wrote the paper: JLC MHF JM.