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・ Odostomia tenera
・ Odostomia tenuis
・ Odostomia tenuisculpta
・ Odostomia terebellum
・ Odostomia terissa
・ Odostomia terrieula
・ Odostomia testiculus
・ Odostomia thalia
・ Odostomia thea
・ Odostomia tomlini
・ Odostomia torrita
・ Odostomia trachis
・ Odostomia tremperi
・ Odostomia trifida
・ Odostomia trimariana
Odostomia tropidita
・ Odostomia truncatula
・ Odostomia turgida
・ Odostomia turricula
・ Odostomia turriculata
・ Odostomia turrita
・ Odostomia tyleri
・ Odostomia ulloana
・ Odostomia umbilicaris
・ Odostomia umbilicatissima
・ Odostomia unalaskensis
・ Odostomia unidens
・ Odostomia unidentata
・ Odostomia unilineata
・ Odostomia vaga


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

''Odostomia tropidita'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔WoRMS (2011). ''Odostomia tropidita'' Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575921 on 2012-01-12〕〔Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064:〕
==Description==
The white shell has a pupiform shape. Its length measures 2.5 mm. The 1½ whorls of the protoconch form a moderately elevated helicoid spire, whose axis is at right angles to that of the succeeding turns, in the first of which it is about one-third immersed. The seven whorls of the teleoconch are moderately rounded, somewhat contracted at the sutures, and strongly tabulated on the summits. They are marked by rounded, weak, axial ribs of which eight occur upon the first and second, ten upon the third, twelve upon the fourth and fifth, and fourteen upon the penultimate turn. The intercostal spaces are broad and shallow. The periphery of the body whorl and base are well rounded. They are marked by the continuation of the ribs. The aperture is broadly oval. The outer lip is thin. The columella is slender and slightly curved.〔(Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, 1p. 134; 1909 )〕

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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