Yokoyama, M. (1923). On some fossil Mollusca from the Neogene of Izumo. Japanese Journal of Geology and Geography, 2(1): 1-9, pls. 1, 2. page(s): 5 [details]
original descriptionYokoyama, M. (1923). On some fossil Mollusca from the Neogene of Izumo. Japanese Journal of Geology and Geography, 2(1): 1-9, pls. 1, 2. page(s): 5 [details]
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