*Keigo YADA¹, Tatsuo OJI², Stephen DORNBOS³, Hitoshi HASEGAWA², Sersmaa GONCHIGDORJ⁴, Takafumi MOCHIZUKI⁵, Hideko TAKAYANAGI⁴, Yasufumi IRYU⁶ (1.Graduate School of Environmental Studies, Nagoya University, 2.Nagoya University Museum, Nagoya University, 3.University of Wisconsin-Madison, 4.Mongolian University of Science and Technology, 5.Iwate Prefectural Museum, 6.Department of Earth Science, Tohoku University)