About the Authors

P. Martin Sander

martin.sander@uni-bonn.de

Affiliation Steinmann Institute of Geology, Mineralogy and Paleontology, University of Bonn, Bonn, Germany

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PMS. Performed the experiments: PMS. Analyzed the data: PMS. Contributed reagents/materials/analysis tools: PMS. Wrote the paper: PMS.