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| image = Viviparus contectus met operculum2.JPG | image_caption = An alive but retracted individual of ''Viviparus contectus'', showing the operculum | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Caenogastropoda informal group Architaenioglossa | superfamilia = Viviparoidea | familia = Viviparidae | familia_authority = J. E. Gray, 1847〔Gray J. E. (November 1847) (1833). "A list of genera of Recent Mollusca, their synonyma and types". ''Proceedings of the Zoological Society in London'', 15: 129-182. Viviparidae at page 155.〕 | subdivision_ranks = Subfamilies | subdivision = * Bellamyinae * Lioplacinae * Viviparinae | diversity_link = Diversity of gastropods | diversity_ref = 〔Strong E. E., Gargominy O., Ponder W. F. & Bouchet P. (2008). "Global Diversity of Gastropods (Gastropoda; Mollusca) in Freshwater". ''Hydrobiologia'' 595: 149-166. .〕 | diversity = 125–150 freshwater species }} Viviparidae, sometimes known as the river snails, are a family of large operculate freshwater snails, aquatic gastropod mollusks. This family is classified in the informal group Architaenioglossa according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005. ==Distribution== This family occurs nearly worldwide in temperate and tropical regions, with the exception that they are absent from South America. There are two genera of Viviparidae in Africa: ''Bellamya'' and ''Neothauma''.〔 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「Viviparidae」の詳細全文を読む スポンサード リンク
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