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Sphaerium corneum : ウィキペディア英語版 | Sphaerium corneum
''Sphaerium corneum'', also known as the European fingernailclam, is a very small freshwater clam, an aquatic bivalve mollusk in the family Sphaeriidae, the fingernail clams. ==Description== The shell is fairly globular and can grow up to 9 - 13.5 mm in size. The color of the shell is usually a brown to gray with the juveniles being a yellow color. Their shells exhibit striae, thin parallel rows of elevated lines.〔Rebekah M. Kipp & Amy Benson. 2012. Sphaerium corneum. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=131 RevisionDate: 3/23/2007〕
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「Sphaerium corneum」の詳細全文を読む
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