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Cantharidoscops frigidus : ウィキペディア英語版 | Cantharidoscops frigidus
''Cantharidoscops frigidus'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.〔WoRMS (2012). ''Cantharidoscops frigidus'' (Dall, 1919). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=576619 on 2012-11-23〕〔Kantor Yu.I. & Sysoev A.V. (2006) Marine and brackish water Gastropoda of Russia and adjacent countries: an illustrated catalogue. Moscow: KMK Scientific Press. 372 pp. + 140 pls.〕 ==Description== The length of the shell varies between 6 mm and 10 mm. The small, polished shell has a conic shape with pale flesh color. It consists of six whorls, including a minute subglobular nucleus. The suture is distinct but not appressed. The whorls are only moderately rounded. The axial sculpture shows faint incremental lines. The spiral sculpture has a few very faint lines near the umbilical region. The base of the shell is rounded and imperforate. The operculum is pale brown with about 8 turns. The aperture is rounded and slightly angular above. The outer lip simple and sharp. The body shows a thin nacreous glaze. The columellar lip is rounded and broader than the rest.〔(Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceeding of the U.S. National Museum, vol. 56 (1920) ) (described as ''Margarites frigidus'')〕
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