About the Authors
- Richard J. Butler
- GeoBio-Center, Ludwig-Maximilians-Universität München, Munich, Germany
- Richard J. Butler, Paul M. Barrett
- Department of Palaeontology, Natural History Museum, London, United Kingdom
- David J. Gower
- Department of Zoology, Natural History Museum, London, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: RJB PMB DJG. Performed the experiments: RJB PMB DJG. Analyzed the data: RJB PMB DJG. Wrote the paper: RJB PMB DJG.