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・ Turbonilla aresta
・ Turbonilla argentea
・ Turbonilla argentina
・ Turbonilla aripana
・ Turbonilla armandoi
・ Turbonilla arnoldoi
・ Turbonilla arta
・ Turbonilla asperula
・ Turbonilla asser
・ Turbonilla assimilans
・ Turbonilla asunae
・ Turbonilla asuncionis
・ Turbonilla ata
・ Turbonilla atlantica
・ Turbonilla atossa
Turbonilla attrita
・ Turbonilla atypha
・ Turbonilla aulica
・ Turbonilla aurantia
・ Turbonilla auricoma
・ Turbonilla axeli
・ Turbonilla aya
・ Turbonilla ayamana
・ Turbonilla azteca
・ Turbonilla bacalladoi
・ Turbonilla baegerti
・ Turbonilla bahiensis
・ Turbonilla bakeri
・ Turbonilla barazeri
・ Turbonilla barkleyensis


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Turbonilla attrita : ウィキペディア英語版
Turbonilla attrita

''Turbonilla attrita'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Rosenberg, G. (2011). ''Turbonilla attrita'' Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581303 on 2012-03-01〕〔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 bluish-white, slender shell has an elongate-conic shape. Its length measures 7.4 mm. The 2½ whorls of the protoconch are small and helicoid. Their axis is at right angles to that of the succeeding turns, in the first of which they are slightly immersed. The 12 whorls of the teleoconch are situated very high between the sutures and almost flattened. They are ornamented with very low, flattened, somewhat irregular, protractive axial ribs, which are best developed on the early whorls. Of these there are 18 upon the second whorl, 22 upon the third, 18 upon the fourth and fifth, 22 upon the sixth, 18 upon the seventh, 20 upon the eight and ninth. On the next turn they become quite enfeebled, and on the penultimate turn they are obsolete. The intercostal spaces are about half as wide as the ribs and very shallow. The sutures are well impressed. The periphery of the body whorl is well rounded. The base of the shell is short and somewhat inflated. The entire surface of the spire and the base is marked by numerous very fine, waxy spiral striations. The aperture is broadly oval. The posterior angle is acute. The outer lip is thin. The short columella is slender, somewhat curved and slightly reflected. 〔(Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 46: 1909 ) 〕

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