1. Poznań University of Life Sciences Institute of Zoology Wojska Polskiego 71C Poznań 60‐625 Poland
2. Institute of Dendrology Polish Academy of Sciences Parkowa 5 62‐035 Kórnik Poland
3. Rocky Mountain Research Station USDA Forest Service 800 E. Beckwith Ave. Missoula Montana 59801 USA
4. Department of Systematic Zoology Faculty of Biology Adam Mickiewicz University Poznań Poland
5. Division of Biological Sciences University of Montana 32 Campus Dr. Missoula Montana 59812 USA