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Ptychophylloceras sp. Sato, T., 1974a pl. J-5, fig. 3 Mesozoic | Mollusca : Cephalopoda Material Reports, no. 15, p. 137. |
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Ptychophylloceras sp. nov. Sato, T., 1962 p. 64, pl. 1, fig. 2; pl. 4, fig. 3 Mesozoic | Mollusca : Cephalopoda Material Reports, no. 2, p. 253. |
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