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・ Odostomia rosacea
・ Odostomia rotundata
・ Odostomia rubra
・ Odostomia rutor
・ Odostomia ryalea
・ Odostomia salinasensis
・ Odostomia sanctorum
・ Odostomia sanjuanensis
・ Odostomia santamariensis
・ Odostomia sapia
・ Odostomia satura
・ Odostomia scalariformis
・ Odostomia scalaris
・ Odostomia scammonensis
・ Odostomia schrami
Odostomia septentrionalis
・ Odostomia serilla
・ Odostomia sicula
・ Odostomia silesui
・ Odostomia sillana
・ Odostomia sitkaensis
・ Odostomia skidegatensis
・ Odostomia socorroensis
・ Odostomia solidula
・ Odostomia sordida
・ Odostomia sorenseni
・ Odostomia sorianoi
・ Odostomia spreadboroughi
・ Odostomia stearnsiella
・ Odostomia stephensae


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Odostomia septentrionalis : ウィキペディア英語版
Odostomia septentrionalis

''Odostomia septentrionalis'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Rosenberg, G. (2011). ''Odostomia septentrionalis'' Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581250 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==
The thin, soiled yellowish white shell is very elongate and has an ovate shape. Its length measures 4.3 mm. It is umbilicated. The whorls of the protoconch are small, smooth, very obliquely, deeply immersed in the first of the succeeding turns. The five whorls of the teleoconch are inflated, well rounded, their summits appressed. They are marked by fine, retractive lines of growth and numerous fine, wavy, spiral striations between the sutures and on the base. The posterior half of the base has, in addition to the above marking, three broad, low, feeble, raised, spiral threads.The umbilicus is very narrow. The aperture is large, very regularly oval. The posterior angle is obtuse. The thin outer lip is bending strongly outward in a broad sweeping curve. The long columella is slender, and regularly curved. It is moderately reflected, and not reinforced by the base. It is provided with a feeble oblique fold at its insertion. The parietal wall is glazed with a thin callus.〔 (Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 205; 1909 ) 〕

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