About the Authors

Thierry Smith

thierry.smith@naturalsciences.be

Affiliation Directorate Earth and History of Life, Royal Belgian Institute of Natural Sciences, Brussels, Belgium

Vlad Codrea

Affiliation Faculty of Biology and Geology, University Babeş-Bolyai, Cluj-Napoca, Romania

Competing Interests

For the fieldwork realised in the scope of the present study the authors had in loan specific field tools and two field cars from Fabricom in 2001 and two cars from Ford Motor in 2002. This does not alter the authors’ adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: TS VC. Performed the experiments: TS VC. Analyzed the data: TS VC. Wrote the paper: TS.