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Odostomia acuta : ウィキペディア英語版 | Odostomia acuta
''Odostomia acuta'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Gofas, S. (2011). ''Odostomia acuta'' Jeffreys, 1848. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=140976 on 2011-10-26〕〔Backeljau, T. (1986). Lijst van de recente mariene mollusken van België (of the recent marine molluscs of Belgium ). Koninklijk Belgisch Instituut voor Natuurwetenschappen: Brussels, Belgium. 106 pp.〕〔Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180-213〕〔Rolán E., 2005. Malacological Fauna From The Cape Verde Archipelago. Part 1, Polyplacophora and Gastropoda.〕〔Muller, Y. (2004). Faune et flore du littoral du Nord, du Pas-de-Calais et de la Belgique: inventaire. (fauna and flora of the Nord, Pas-de-Calais and Belgium: inventory ). Commission Régionale de Biologie Région Nord Pas-de-Calais: France. 307 pp.〕 ==Description== The shell is rather solid, but semitransparent and lustrous, with microscopic close spiral striae, and still more minute, flexuous, crowded growthlines. The shell is whitish with a tinge of flesh-color. The are six whorls besides the embryonic ones. The periphery is obtusely keeled. The umbilicus is conspicuous but small. The tooth is strong and prominent. The outer lip is occasionally striate within.〔G.W. Tryon, Manual of Conchology vol. VIII, p. 348-349; 1889〕
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