1. Department of Physics, University of Turin, Via Pietro Giuria, 1, 10125 Turin, Italy
2. INFN, Section of Turin, Via Pietro Giuria, 1, 10125 Turin, Italy
3. DAIS Department of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University of Venice, Via Torino, 155, 30170 Venice, Italy
4. Institute of Zoology, State University of Moldova, Academiei Str., 1, MD-2028 Chisinau, Moldova
5. National Museum of Ethnography and Natural History, M. Kogalniceanu Str., 82, MD-2009 Chisinau, Moldova
6. Department of Earth Sciences, University of Turin, Via Valperga Caluso, 35, 10125 Turin, Italy
7. IMT School for Advanced Studies Lucca, Piazza S. Francesco, 19, 55100 Lucca, Italy