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Cyclostrema gyalum : ウィキペディア英語版 | Cyclostrema gyalum
''Cyclostrema gyalum'' is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.〔Bouchet, P. (2012). ''Cyclostrema gyalum'' Melvill, 1904. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=701862 on 2012-12-03〕〔Bosch D.T., Dance S.P., Moolenbeek R.G. & Oliver P.G. (1995) Seashells of eastern Arabia. Dubai: Motivate Publishing. 296 pp.〕 ==Description== The height of the shell attains 2 mm, its diameter 5 mm. The shell contains 5 whorls ans a minute nucleus. The whorls increase rapidly in size. The body whorl contains three acute keels. The basal keel encircles the umbilicus, which is particularly large and deep compared to the size of the shell. The aperture has a square shape. The thin outer lip is angulate.〔(Melvill (1904) Descriptions of 28 species of Gastropoda from the Persian Gulf, the Gulf of Oman and the Arabian Sea; Proceedings of the Malacological Society of London v.6 (1904-1905) )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Cyclostrema gyalum」の詳細全文を読む
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