1. Department Functional Morphology and Biomechanics Zoological Institute of the University of Kiel Am Botanischen Garten 1–9 D-24118 Kiel Germany
2. East Bavarian Centre for Intelligent Materials (EBACIM) Ostbayerische Technische Hochschule (OTH) Regensburg Seybothstr. 2 D‐93053 Regensburg Germany