|
''Sphaerium'' is a genus of very small freshwater clams, aquatic bivalve mollusks in the family Sphaeriidae, known as the fingernail clams. The small clams in this genus are unusual in that many of them, such as ''Sphaerium corneum'', can climb around underwater on aquatic plants, using their long and strong foot. ==Species== * Subgenus ''Sphaerium'' Scopoli, 1777 : * ''Sphaerium corneum'' (Linnaeus, 1758) - European fingernail clam * Subgenus ''Nucleocyclas'' Alimov & Starobogatov, 1968 : * ''Sphaerium nucleus'' (Studer, 1820) : * ''Sphaerium ovale'' (A. Férussac, 1807) * Subgenus ''Parasphaerium'' Alimov & Starobogatov, 1968 : * ''Sphaerium nitidum'' Clessin, 1876 - Arctic fingernail clam * Subgenus ''Amesoda'' Rafinesque, 1820 : * ''Sphaerium rivicola'' (Lamarck, 1818) * Subgenus ''Cyrenastrum'' Bourguignat, 1854 : * ''Sphaerium solidum'' (Normand, 1844) * Without subgenus : * ''Sphaerium asiaticum'' (Martens, 1864) : * ''Sphaerium bequaerti'' (Dautzenberg & Germain, 1914) - data deficient (DD)〔Nicayeniz, F., Lange, C.N. & Ngereza, C. 2004. Sphaerium bequaerti. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. : * ''Sphaerium cornuta'' : * ''Sphaerium novaezelandiae'' Deshayes, 1854 : * ''Sphaerium stuhlmanni'' Martens, 1897 - data deficient (DD)〔Lange, C.N. & Ngereza, C. 2004. Sphaerium stuhlmanni. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. * Extinct : * ''Sphaerium beckmani'' Russell, 1976 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」の詳細全文を読む スポンサード リンク
|