1. Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan (e-mail: tsubamoto@ sci.ehime-u.ac.jp)
2. Faculty of Business Administration, Ryukoku University, 67 Tsukamoto-cho, Fukakusa, Fushimi-ku, Kyoto 612-8577, Japan
3. Interdisciplinary Faculty of Science and Engineering, Shimane University, 1060 Nishikawatsu-cho, Matsue, Shimane 690-8504, Japan
4. Faculty of Biosphere-Geosphere Science, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan
5. Faculty of Nursing and Rehabilitation, Chubu Gakuin University, 2-1 Kirigaoka, Seki, Gifu 501-3993, Japan
6. Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
7. Faculty of Science, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
8. Museum of Osaka University, Osaka University, 1-20 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
9. Tottori Prefectural Museum, 2-124 Higashi-machi, Tottori 680-0011, Japan
10. Department of Earth Sciences, National Museums of Kenya, P.O. Box 40658-00100, Nairobi, Kenya