1Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
2Department of Anthropology, 13-15 Tory Building, University of Alberta, Edmonton T6G 2H4, AB, Canada
3Laboratory of Archaeology and Paleoecology, Irkutsk State University, Karl Marx 1, 664003 Irkutsk, Russia
4Institute of General and Experimental Biology, Siberian Division, Russian Academy of Sciences, 670047 Ulan-Ude, Russia