About the Authors

Matthew J. Cobley

cobley.mj@gmail.com

Current address: Department of Biology, University of Utah, Salt Lake City, Utah, United States of America

Affiliation School of Earth Sciences, University of Bristol, Bristol, United Kingdom

Emily J. Rayfield

Affiliation School of Earth Sciences, University of Bristol, Bristol, United Kingdom

Paul M. Barrett

Affiliation Department of Earth Sciences, The Natural History Museum, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PMB MJC. Performed the experiments: MJC. Analyzed the data: MJC. Contributed reagents/materials/analysis tools: EJR. Wrote the paper: MJC PMB EJR. Supervision: EJR PMB.