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Oxystele tigrina : ウィキペディア英語版 | Oxystele tigrina
''Oxystele tigrina'', common name the tiger top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. ==Description== The size of an adult shell varies between 25 mm and 43 mm. The more or less elevated, imperforate shell has a conoidal shape. It is lusterless blackish or purplish, unicolored or with a few scattered white dots, or yellowish flexiious lines. The yellow or whitish, apical whorls are eroded. The about 6 whorls are spirally coarsely but obsoletely lirate. The large aperture lis oblique with a black border and is silvery within. The simple columella is white or yellowish, bordered by a dull purplish streak. The parietal wall is usually covered by a thin silvery callus.〔(Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia )〕
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