About the Authors

Felipe L. Pinheiro

fl_pinheiro@yahoo.com.br

Affiliations Departamento de Paleontologia e Estratigrafia, IGeo, Universidade Federal do Rio Grande do Sul. Avenida Bento Gonçalves, Porto Alegre, Brazil, Bayerische Staatssammlung für Paläontologie und Geologie, Munich, Germany

Cesar L. Schultz

Affiliation Departamento de Paleontologia e Estratigrafia, IGeo, Universidade Federal do Rio Grande do Sul. Avenida Bento Gonçalves, Porto Alegre, Brazil

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: FLP. Analyzed the data: FLP CLS. Wrote the paper: FLP.