1. Conservation of Aquatic Biodiversity, Faculty of Agriculture, Okayama University, Okayama, Japan
2. Osaka Museum of Natural History, Ōsaka, Japan
3. Nishinomiya Shell Museum, Nishinomiya, Japan
4. Takamatsu, Japan
5. Department of Geology and Paleontology, National Museum of Nature and Science, Tokyo, Tsukuba, Japan