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Pisidium amnicum : ウィキペディア英語版 | Pisidium amnicum
''Pisidium amnicum'' is a species of very small freshwater clam. It is sometimes known as the greater European peaclam River pea shell.It is an aquatic bivalve in the family Sphaeriidae. ==Description== Although only 9 mm (range 7-11 mm.) in length, this species is considerably larger than most ''Pisidium'' species, and has a fairly thick, concentrically ridged shell.This is glossy and triangular oval in shape. The shell is solid, and has broad but not prominent umbos often coated with a dull ferruginous deposit.The colour is grey-white to brown often with a greenish cast.
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「Pisidium amnicum」の詳細全文を読む
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