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Bythinella
''Bythinella'' is a genus of very small freshwater snails, an aquatic gastropod mollusk in the family Amnicolidae (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). These gonochoristic snails are small animals, with a shell length of about 2–4 mm.〔Bichain ''et al.'' (2007)〕 ''Amnicola'' is a close relative, containing North American snails with essentially similar appearance and ecology. The scientific name means "small ''Bithynia''"; the latter snail genus is somewhat similar at a casual glance (though much larger) but not at all closely related among the Rissooidea. == Distribution == The present genus occurs in springs, and sometimes caves or groundwater, from Catalonia across central Europe to the Aegean Region of Turkey. In and around France a particularly high diversity of these snails is found. Due to the limited range and special and easily destroyed habitat, these snails are liable to become endangered species.〔
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「Bythinella」の詳細全文を読む
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