1. Nature Research Centre; Akademijos 2 Vilnius LT-08412 Lithuania
2. Department of Environmental Sciences; University of Helsinki; POB 65 Helsinki FIN-00014 Finland
3. Finnish Museum of Natural History; University of Helsinki; POB 17 Helsinki FIN-00014 Finland
4. Department of Zoology; Vilnius University; M. K. Čiurlionio 21/27 Vilnius LT-03101 Lithuania