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Odostomia esilda
''Odostomia esilda'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Rosenberg, G. (2011). ''Odostomia esilda'' Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581198 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 elongate-ovate shell is light yellow. It measures 5.5 mm. The nuclear whorls are decollated. The six post-nuclear whorls are inflated, slightly rounded in the middle, more so toward the suture, and the appressed summit. The periphery and the base of the body whorl are well rounded, the latter narrowly umbilicated. The entire surface of the spire and the base are marked by vertical lines of growth and numerous very fine, closely spaced, spiral lirations. The aperture is large, oval and slightly effuse anteriorly. The posterior angle is obtuse. The outer lip is thin. The slender columella is strongly reflected, almost closing the umbilicus. The columella is provided with a strong, deep-seated fold at its insertion. 〔 ( William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909 ) 〕
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