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Drillia umbilicata : ウィキペディア英語版 | Drillia umbilicata
''Drillia umbilicata'' is a species of sea snail, a marine gastropod mollusk in the family Drilliidae. ==Description== The shell grows to a length of 32 mm. The shell is light yellowish brown or yellowish white. It shows prominent, distant ribs, forming a strongly tuberculate shoulder, and revolving striae. The anal sinus is produced upwards. The inner lip is thickened below, forming with the axis a false umbilicus 〔 G.W. Tryon, Manual of Conchology vol. VI p. 179; 1884 〕
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「Drillia umbilicata」の詳細全文を読む
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