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Astryclypeus manni ambigenus Nisiyama Missing Shikama, T., 1943 p. 247, pl. 41, fig. 2 Cenozoic | Echinodermata Material Reports, no. 15, p. 144. |
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Astryclypeus manni ambigenus Nisiyama Missing Shikama, T., 1952 p. 158, pl. 41, fig. 2 Cenozoic | Echinodermata Material Reports, no. 15, p. 154. |
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