original description(ofCalliostoma (Otukaia) otukai Ikebe, 1942)Ikebe, N. (1942). Trochid Mollusca Calliostoma of Japan, fossil and recent. <em>Japanese Journal of Geology and Geography.</em> 18: 249-282.[details]
From other sources
Taxonomy Some authors place this taxon in the subgenus Calliostoma (Otukaia) [details]
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