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Oxynodiscus keideli Kobayashi Holotype Missing Kobayashi, T., 1935f p. 63, pl. 11, figs. 19, 20 Paleozoic | Mollusca : Gastropoda Material Reports, no. 2, p. 108. |
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Oxynodiscus sigmoidalis Kobayashi Holotype Kobayashi, T., 1934b p. 361, pl. 5, figs. 8, 9 Paleozoic | Mollusca : Gastropoda Material Reports, no. 2, p. 80. |
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