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Kobayashi, T. (1957). Nipponitrigonia and Rutitrigonia in Japan. Transactions and Proceedings of the Palaeontological Society of Japan, new series. 26: 51-61.
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Kobayashi, T.
1957
<em>Nipponitrigonia</em> and <em>Rutitrigonia</em> in Japan
Transactions and Proceedings of the Palaeontological Society of Japan, new series
26: 51-61
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Nipponitrigonia convexa T. Kobayashi, 1957 † (original description)