1. Department of Geology and Paleontology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan (e-mail: )
2. The Kyushu University Museum, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan
3. Toko 15-4-2-3, Asahikawa, Hokkaido 078-8355, Japan