1. Department of Ecology Faculty of Natural Sciences Comenius University in Bratislava Ilkovičova 6 84215 Bratislava Slovakia
2. Institute of Measurement Science Slovak Academy of Sciences Dúbravská cesta 9 84104 Bratislava Slovakia
3. Joseph Banks Laboratories School of Life Sciences University of Lincoln Green Lane Lincoln LN6 7DL UK
4. Section of Vertebrate Paleontology Carnegie Museum of Natural History 4400 Forbes Avenue Pittsburgh PA 15213 USA
5. Department of Organismic & Evolutionary Biology, & Museum of Comparative Zoology Harvard University Cambridge MA USA