Yokoyama, M. (1927). Fossil Mollusca from Kaga. <em>Journal of the Faculty of Science, Tokyo Imperial University.</em> section 2, 2(4): 165–182, pls 47–49. page(s): p. 175, pl. 47, fig. 7. [details]
original descriptionYokoyama, M. (1927). Fossil Mollusca from Kaga. <em>Journal of the Faculty of Science, Tokyo Imperial University.</em> section 2, 2(4): 165–182, pls 47–49. page(s): p. 175, pl. 47, fig. 7. [details]
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