(ofTurbonilla (Pyrgiscus) optima Nomura, 1936)Nomura, S. (1936). Pyramidellidae from Siogama Bay, Northeast Honsyu, Japan. <em>Saito Ho-On Kai Museum Research Bulletin.</em> 10: 1-108, pls. 1-12.[details]
MolluscaBase eds. (2024). MolluscaBase. Pyrgiscus optimus (Nomura, 1936). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=740425 on 2024-07-31
original description(ofTurbonilla (Pyrgiscus) optima Nomura, 1936)Nomura, S. (1936). Pyramidellidae from Siogama Bay, Northeast Honsyu, Japan. <em>Saito Ho-On Kai Museum Research Bulletin.</em> 10: 1-108, pls. 1-12.[details]
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