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・ Odostomia ritteri
・ Odostomia romburghi
・ Odostomia rosacea
・ Odostomia rotundata
・ Odostomia rubra
・ Odostomia rutor
・ Odostomia ryalea
・ Odostomia salinasensis
・ Odostomia sanctorum
・ Odostomia sanjuanensis
・ Odostomia santamariensis
・ Odostomia sapia
・ Odostomia satura
・ Odostomia scalariformis
・ Odostomia scalaris
Odostomia scammonensis
・ Odostomia schrami
・ Odostomia septentrionalis
・ Odostomia serilla
・ Odostomia sicula
・ Odostomia silesui
・ Odostomia sillana
・ Odostomia sitkaensis
・ Odostomia skidegatensis
・ Odostomia socorroensis
・ Odostomia solidula
・ Odostomia sordida
・ Odostomia sorenseni
・ Odostomia sorianoi
・ Odostomia spreadboroughi


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

''Odostomia scammonensis'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. 〔 (W.H. Dall and P. Bartsch, "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909 ) 〕
According to the Smithsonian Institution ''Odostomia scammonensis'' has received the same collection number as ''Odostomia talama'' Dall & Bartsch, 1909 〔 (Smithsonian Institution : ''Odostomia (Chrysallida) talama'' ) 〕
==Description==
The large shell is white and has an elongate-conic shape. Its length measures 5.1 mm. The whorls of the protoconch are smooth, deeply obliquely immersed in the first of the succeeding turns, above which only a portion of the last volution projects. The eight whorls of the teleoconch are very slightly rounded, moderately contracted at the sutures, slightly excurved at the shouldered summit. They are marked by strong, vertical axial ribs, of which 16 occur upon the second and third, 18 upon the fourth, 20 upon the fifth and sixth, and 26 upon the penultimate turn. The intercostal spaces are about twice as wide as the ribs, crossed by five slender spiral cords between the sutures, which render the
ribs feebly nodulous at their junction. The sutures are strongly impressed. The periphery and the base of the body whorl are decidedly inflated, the latter narrowly umbilicated. They are marked by seven weak spiral cords. The aperture is large and elongate-oval. The outer lip is thin, showing the external sculpture within. The columella is slender, curved, reflected. It is provided with a strong fold at its insertion. 〔

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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