1. Dipartimento di Biologia Ecologia e Scienze della Terra Università della Calabria Via P. Bucci Cubo 15b Rende Italy
2. Faculty of Geology University of Warsaw Żwirki i Wigury 93 Warsaw 02‐089 Poland
3. Institute of Geology and Petroleum Technologies Kazan Federal University Kremlovskaya 18 Kazan 420008 Russia
4. School of Earth Sciences University of Bristol Bristol BS8 1RJ UK