1. Geozentrum Nordbayern, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen 91054, Germany
2. MARE (Marine and Environmental Sciences Centre), 3004-517 Coimbra, Portugal
3. Department of Earth Sciences, University of Coimbra, 3070-790 Coimbra, Portugal
4. National Museum of Natural History Luxembourg, Department of Palaeontology, 2160 Luxembourg, Luxembourg