1. Institute of Evolution and Ecology, Evolutionary Biology of Invertebrates; Eberhard-Karls-University Tübingen; Auf der Morgenstelle 28 72076 Tübingen Germany
2. Department of Geosciences; Invertebrate Paleontology and Paleoclimatology, Eberhard-Karls-University Tübingen; Hölderlinstr. 12 72074 Tübingen Germany