1. Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara, Ferrara, Italy
2. Department of Geosciences, University of Tübingen, Tübingen, Germany
3. Faculty of Science, Department of Biological Sciences, Kanagawa University, Hiratsuka, Japan
4. Museo di Casa Romei, Polo Museale dell'Emilia Romagna, Ferrara, Italy
5. Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, Sendai, Japan