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Skenea peterseni : ウィキペディア英語版 | Skenea peterseni
''Skenea peterseni'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae. ==Description== (Original description by Herman Friele) The height of the shell attains 2.5 mm, its diameter 2.3 mm. The shell has a somewhat depressed oblique-oval form. The white shell is solid, smooth and glossy. The four whorls are very tumid, the last one occupying ¾ of the length. The spire is conically rounded. The aperture is nearly circular. A ledge runs along the inner side of the lip, not far from the opening. There is no real umbilicus, but an umbilical split. There are microscopically lines of growth barely perceptible. The horny operculum has seven volutions.〔( Friele H., 1877: ''Preliminary report on the Mollusca from the Norwegian North Atlantic Expedition in 1876''; Nyt Magazin for Naturvidenskaberne 23: 1-10, 1 pl. )〕
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「Skenea peterseni」の詳細全文を読む
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