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Ethalia omphalotropis : ウィキペディア英語版 | Ethalia omphalotropis
''Ethalia omphalotropis'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.〔Bouchet, P. (2014). Ethalia omphalotropis A. Adams, 1863. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=732107 on 2014-06-29〕 ==Description== The small, semi-transparent shell has an ovate-discoidal shape. Its colour is white and entirely devoid of coloured markings. The 3½ convex whorls increase rapidly in size with deeply marked sutures. The body whorl has a spherical periphery. This species has a peculiar sharp keel surrounding the umbilicus. The aperture has an almost circular shape. 〔 ( A. . Adams. Ann. Mag. 1865, p. 266 ) 〕
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「Ethalia omphalotropis」の詳細全文を読む
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