Helisoma
Introduction '''''Helisoma''''' is a genus of freshwater air-breathing snails, a pulmonate gastropod mollusk in the family ''Planorbidae'', the ram's horn snails.Synonym:* '' Carinifex'' Binney, 1864''Helisoma'' snails are an intermediate host of ''Megalodiscus temperatus''.
Species Species within the genus ''Helisoma'' include:* ''Helisoma anceps'', sometimes known as ''Planorbella anceps''* ''Helisoma campanulatum'' (Say, 1821) : synonym of ''Planorbella campanulata'' (Say, 1821)
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