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Odostomia barkleyensis
''Odostomia barkleyensis'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Rosenberg, G. (2011). ''Odostomia barkleyensis'' Dall & Bartsch, 1910. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581107 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 shell is small, measuring 3.1 mm. It is regularly conic, bluish-white. The nuclear whorls are deeply and obliquely immersed in the first of the succeeding turns, above which only the tilted edge of the last volution projects. The 5½ post-nuclear whorls are slightly rounded. They are marked by fine retractive lines of growth and numerous fine, spiral striations. The sutures are strongly impressed. The periphery of the body whorl is subangulated. The base of the shell is rather short, sloping from the subangulated periphery to its anterior margin, with a tumid area
bounding the narrow umbihcus, marked like the spire. The aperture is oval. The posterior angle is acute. The outer lip is thin. The inner lip is decidedly curved and reflected. The columella is provided with a strong oblique fold at its insertion. The parietal wall is glazed with a moderately thick callus. 〔 (Paul Bartsch, Proceeding of the U.S. National Museum :42; 1912 ) 〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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