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Fossarina picta : ウィキペディア英語版 | Fossarina picta
''Fossarina picta'' is a species of very small sea snail, a marine gastropod mollusc or micromollusk in the family Trochidae, the top snails.〔( A. Adams, Description of new species of shells from Japan,; Proceedings of the Zoological Society of London, 1867 )〕 ==Description== The shell grows to a length of 4 mm. The depressed, turbinate shell is very similar to ''Fossarina patula'', but the spiral lirae are equal and simple. The shell contains four convex whorls. The body whorl is large with a rounded margin. The sharp lips are arcuate. The aperture is nearly circular. The outline of the shell is more orbicular. The shell is marked with irregular purple-black radiating blotches. The umbilical region is generally pale yellow. 〔
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「Fossarina picta」の詳細全文を読む
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