1. Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Ten-nodai, Tsukuba, Ibaraki 305-8572, Japan (e-mail: tongtherm@gmail.com)
2. Department of Geology and Paleontology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan
3. Mineral Resources Research and Development Center, Department of Mineral Resources, 75/10 Rama VI Road, Ratchatewi, Bangkok 10400, Thailand