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Protocycloceras ? deprati Reed Kobayashi, T., 1928 p. 184, pl. 19, fig. 5 Paleozoic | Mollusca : Cephalopoda Material Reports, no. 2, p. 59. |
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Protocycloceras chikunense Kobayashi Holotype Kobayashi, T., 1928 p. 183, pl. 18, fig. 7a, b Paleozoic | Mollusca : Cephalopoda Material Reports, no. 2, p. 59. |
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