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・ Turbonilla gradata
・ Turbonilla grandis
・ Turbonilla grippi
・ Turbonilla grohi
・ Turbonilla gruberi
・ Turbonilla gruveli
・ Turbonilla guaicurana
・ Turbonilla guanacastensis
・ Turbonilla guatulcoensis
・ Turbonilla guerrai
・ Turbonilla guillemi
・ Turbonilla guilleni
・ Turbonilla gutierrezi
・ Turbonilla halanychi
・ Turbonilla haleyi
Turbonilla halibrecta
・ Turbonilla halidoma
・ Turbonilla halistrepta
・ Turbonilla hamata
・ Turbonilla hamonvillei
・ Turbonilla hannai
・ Turbonilla hannibali
・ Turbonilla hansi
・ Turbonilla haroldi
・ Turbonilla hattenbergeri
・ Turbonilla haullevillei
・ Turbonilla haycocki
・ Turbonilla hecuba
・ Turbonilla heilprini
・ Turbonilla hemphilli


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

''Turbonilla halibrecta'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔Rosenberg, G. (2011). ''Turbonilla halibrecta'' Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=581335 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 shell has an elongate-conic shape. Its length measures 6.2 mm. The two helicoid whorls of the protoconch are depressed. Their axis is at nearly right angles to that of the succeeding turns, in the first of which they are very slightly immersed. The nine whorls off the teleoconch are flattened in the middle, and slightly rounded toward the somewhat shouldered summit and the periphery. They are marked by strong, rounded, almost vertical axial ribs, of which there are 20 on the first to fifth, 18 upon the sixth, and 16 upon the remaining turns. The intercostal spaces are a little wider than the ribs, and well impressed. The sutures are strongly marked. The periphery of the body whorl is well rounded. It is marked by the
feeble continuations of the axial ribs. The base of the shell is short, and well rounded. The entire surface of the spire and the base is marked by exceedingly fine, closely crowded, spiral striations. The oval aperture is rather small. The posterior angle is acute. The columella is short and curved. 〔(Dall & Bartsch (1909), A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p.65-66 ) 〕

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