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Odostomia dinella : ウィキペディア英語版 | Odostomia dinella
''Odostomia dinella'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Rosenberg, G. (2011). ''Odostomia dinella'' Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581129 on 2011-10-26〕 〔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== The small shell is ovate, vitreous and semitransparent. Its length measures 2.2 mm. The five whorls of the teleoconch form a spire with almost straight sides, slightly rounded, feebly contracted at the suture, appressed at the summit. They are marked only by lines of growth. The sutures are well impressed. The periphery of the body whorl is obscurely angulated. The base of the shell is somewhat inflated, well rounded, narrowly umbilicated and marked like the spire. The aperture is ovate. The posterior angle is acute. The outer lip is thin. The columella is slender, almost vertical, slightly revolute, provided with a weak fold at its insertion. The parietal wall is covered with a strong callus. 〔 ( William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909 ) 〕
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