| Taxon Code | 18 |
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| Taxon | Paleozoic and Mesozoic Gastropoda, Monoplacophora and Hyolitha (Gastropoda) |
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| Scientific name | Helicotoma tamurai |
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| Author | Kobayashi, 1930 |
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| Year | 1930 |
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| Reference | Japan. Jour. Geol. Geogr., vol. 7, nos. 3 - 4, p. 95, pl. 11, fig. 4 |
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| Type specimen | Holotype: UMUT PM0081 |
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| Type locality | Taisei - ri, Bantatsu - men, Koto - gun, Pyongan - namdo (Heian - nan - do), North Korea |
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| Formation name | Unkaku bed, Chosen Group |
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| Age | Middle Ordovician |
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| Remarks | |
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| Special Papers No. | 39 |
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| Page | 382 |
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| Extractor | KASE, Tomoki |
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| Comment | |
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