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・ Turbonilla ferrani
・ Turbonilla festiva
・ Turbonilla fideliformis
・ Turbonilla fijianorum
・ Turbonilla fijiensis
・ Turbonilla finlayi
・ Turbonilla fitoi
・ Turbonilla flaianoi
・ Turbonilla flavescens
・ Turbonilla florida
・ Turbonilla fontainei
・ Turbonilla fonteini
・ Turbonilla forsteriana
・ Turbonilla forticostae
・ Turbonilla franciscana
Turbonilla canadensis
・ Turbonilla cancellata
・ Turbonilla candida
・ Turbonilla canfieldi
・ Turbonilla canquei
・ Turbonilla capa
・ Turbonilla capixaba
・ Turbonilla carifa
・ Turbonilla carlosruizi
・ Turbonilla carlotae
・ Turbonilla carlottoi
・ Turbonilla carmeae
・ Turbonilla carmenae
・ Turbonilla carpenteri
・ Turbonilla castanea


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

''Turbonilla canadensis'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔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 yellowish white shell is slender and has an elongate-conic shape. Its length measures 6.3 mm. The 2½ whorls of the protoconch are small, and depressed helicoid. Their axis is at right angles to that of the succeeding turns, in the first of which they are about one-fourth immersed. The 11 whorls of the teleoconch are almost flattened, and situated rather high between the sutures. They are appressed at the summit. They are marked by quite regular, slightly curved, protractive, axial ribs, of which 14 occur upon the first, 16 upon the second and third, 18 upon the fourth to seventh, 20 upon the eighth, and 22 upon the ninth and the penultimate turn. The intercostal spaces are not quite as wide as the ribs. They are deeply impressed, terminating at the periphery, which is decidedly angulated. There is a smooth space between the periphery and the succeeding whorl, which falls at some little distance anterior to the periphery of the preceding turn. This gives the whorls a somewhat overhanging appearance. The suture is well constricted. The base of the shell is short, well rounded, its entire surface marked by microscopic striations. The aperture is subquadrate. The posterior angle is obtuse. The outer lip is thin. The inner lip is slightly curved and somewhat revolute. 〔 ( P. Bartsch (1917), Descriptions of new west American marine mollusks and notes on previously described forms; Proceedings of The United States National Museum, vol.52; ISSN 0096-3801 ) 〕

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