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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 Odostomia helena ： ウィキペディア英語版 Odostomia helena ''Odostomia helena'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Rosenberg, G. (2011). ''Odostomia helena'' Bartsch, 1912. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581215 on 2011-11-10〕〔Turgeon, D.; Quinn, J.F.; Bogan, A.E.; Coan, E.V.; Hochberg, F.G.; Lyons, W.G.; Mikkelsen, P.M.; Neves, R.J.; Roper, C.F.E.; Rosenberg, G.; Roth, B.; Scheltema, A.; Thompson, F.G.; Vecchione, M.; Williams, J.D. (1998). Common and scientific names of aquatic invertebrates from the United States and Canada: mollusks. 2nd ed. American Fisheries Society Special Publication, 26. American Fisheries Society: Bethesda, MD (USA). ISBN 1-888569-01-8. IX, 526 + cd-rom pp.〕 ==Description== Shell moderately large measuring 5 mm. It is yellowish-white, very elongate-ovate. The nuclear whorls are small, very obliquely immersed in the first of the succeeding turns, above which the tilted edge of the last volution only projects. The six post-nuclear whorls are subtabulately shouldered at the summit and well-rounded. They are apparently marked by incremental lines only. The sutures are strongly constricted. The periphery of the body whorl is somewhat inflated, well rounded. The base of the shell is short, well rounded and broadly umbilicated. It is marked like the spire. The ovate aperture moderately large. The posterior angle is obtuse. The outer lip is evenly curved. The inner lip is sinuous, reflected over, but not adnate to the base. The columella is provided with a strong oblique fold, which is about one-third of the distance of the length of the inner lip anterior to the insertion of the inner lip. The position of the columellar fold will distinguish this species at a glance from all the other California shells.The parietal wall is covered with a thick callus. 〔 Proceedings of the United States National Museum 42:286 Odostomia (Amaura) helena〕 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「Odostomia helena」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.