About the Authors

Ted W. Cranford

Ted.W.Cranford@gmail.com

‡ These authors contributed equally to this work.

Affiliation San Diego State University, Department of Biology, San Diego, California, United States of America, and Quantitative Morphology Consulting, Inc., San Diego, California, United States of America

Petr Krysl

‡ These authors contributed equally to this work.

Affiliation University of California San Diego, Department of Structural Engineering, La Jolla, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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