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Dillwynella texana : ウィキペディア英語版 | Dillwynella texana
''Dillwynella texana'' is an extinct species of sea snail, a marine gastropod mollusk in the family Skeneidae.〔(G. Harris, New and Otherwise Interesting Tertiary Mollusca from Texas; Proceedings of the Academy of Natural Sciences of Philadelphia, Vol. 47, (1895), pp. 45-88 )〕 ==Description== The shell contains four, spiral, smooth and shining whorls. The body whorl is nearly smooth but showing a slight tendency to bear furrows or lines radiating from the suture. The umbilicus is small. The aperture is round.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Dillwynella texana」の詳細全文を読む
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