Calliostoma thrincoma is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Description The height of this conical-pyramidal, imperforate shell attains 11 mm. It is highly sculptured and conspicuously keeled around every whorl just above the suture. The body whorl at the periphery is bicarinate. The aperture is square-shaped. The Annals and magazine of natural history, Melvill & Standen, Description of sixty-eight new gastropoda from the Persian Gulf, the Gulf of Oman and the North Arabian Sea; 7th ser. v. 12 (1903)
Distribution This species occurs in the Gulf of Oman.
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