1. VetCore Facility for Research/ Imaging Unit, University of Veterinary Medicine Vienna, Veterinaerplatz 1, 1210 Vienna, Austria
2. Department Biology, Faculty of Natural Sciences, Shumen University, Universitetska 115, Shumen, Bulgaria
3. Department for Integrative Zoology, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
4. UMR 7179 C.N.R.S/M.N.H.N., Département Adaptations du Vivant, Bâtiment d'Anatomie Comparée, 55 rue Buffon, 75005, Paris, France
5. National Museum of Natural History, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria