About the Authors

Adrian Kin

† Deceased.

Affiliation Society of Friends of Earth Sciences PHACOPS, Warsaw, Poland

Błażej Błażejowski

bblazej@twarda.pan.pl

Affiliation Institute of Paleobiology, Polish Academy of Sciences, Warsaw, Poland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BB AK. Performed the experiments: BB AK. Analyzed the data: BB AK. Wrote the paper: BB AK.