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Perrona spirata : ウィキペディア英語版 | Perrona spirata
''Perrona spirata'' is a species of sea snail, a marine gastropod mollusk in the family Clavatulidae. ==Description== The size of an adult shell varies between 20 mm and 30 mm. The whorls are constricted around the upper part, with a rather sharp ridge next to the suture, and an obtuse angle below the constriction. The color of the shell is yellowish, mottled and striped with chestnut. 〔 George Washington Tryon, Manual of Conchology vol. VI p. 232; 1884 (described as ''Clavatula spirata'') 〕
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「Perrona spirata」の詳細全文を読む
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