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Planammatoceras chibai (Yokoyama) Holotype Takahashi, H., 1974c pl. J-2, fig. 8 Mesozoic | Mollusca : Cephalopoda Material Reports, no. 15, p. 184. |
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Planammatoceras hosourense (Sato) Holotype Takahashi, H., 1974c pl. J-2, fig. 10 Mesozoic | Mollusca : Cephalopoda Material Reports, no. 15, p. 184. |
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