1. Department of Cariology, Endodontology and Periodontology, Universität Leipzig 1 , Liebigstraße 12, 04103 Leipzig, Germany
2. Department of Electron Microscopy, Institute of Cell and Systems Biology of Animals, Universität Hamburg 2 , Martin-Luther-King-Platz 3, 20146 Hamburg, Germany
3. Department of Mammalogy and Palaeoanthropology, Leibniz Institute for the Analysis of Biodiversity Change 3 , Martin-Luther-King-Platz 3, 20146 Hamburg, Germany
4. Department of Functional Morphology and Biomechanics, Zoological Institute, Christian-Albrechts-Universität zu Kiel 4 , Am Botanischen Garten 1–9, 24118 Kiel, Germany