About the Authors

Orphal Colleye


Affiliation Laboratory of Functional and Evolutionary Morphology, University of Liège, Liège, Belgium

Eric Parmentier

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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