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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Turbonilla adaba ： ウィキペディア英語版 Turbonilla adaba ''Turbonilla adaba'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. 〔 ==Description== The white shell has a broadly elongate-conic shape. Its length measures 5 mm. The whorls of the protoconch are well rounded, and smooth. They are obliquely immersed in the first of the succeeding turns, above which the tilted edge of the last volution only projects. The eight whorls of the teleoconch are almost flattened. They are very strongly, tabulatedly shouldered at the summit. They are crossed by strong, very regular, somewhat sinuous, slightly protractive, axial ribs, of which 20 occur upon the second and third, 22 upon the fourth and fifth, 24 upon the sixth, and 28 upon the penultimate turn. These ribs extend prominently from the shoulder, which they render crenulated, to the periphery of the turn. The intercostal spaces are a little wider than the rib. A spiral cord in the intercostal is present about one-fifth of the space between the sutures posterior to the suture, which is equal in strength to the spiral cord at the periphery. The sulcus between the two spiral cords and between the anterior cord and the periphery of the body whorl are marked by the continuations of the axial ribs. The sutures are strongly channeled. The periphery of the body whorl is rendered decidedly angulated by the spiral cord. The base of the shell is rather long, well rounded, and narrowly umbilicated. The entire surface is marked by slender spiral striations. The aperture is broadly oval. The outer lip is moderately thick. The inner lip is somewhat curved and slightly revolute. The columella is provided with an oblique fold at its insertion. The parietal wall is glazed with a thick callus. 〔 ( Paul Bartsch (1915), Report on the Turton collection of South African marine mollusks; United States National Museum, bulletin 91 ) 〕 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「Turbonilla adaba」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.