Helisoma

{{Short description|Genus of gastropods}}

{{Automatic taxobox

| image = Naturalis Biodiversity Center - ZMA.MOLL.372960 - Helisoma anceps (Menke, 1830) - Planorbidae - Mollusc shell.jpeg

| image_caption = Helisoma anceps

| taxon = Helisoma

| authority = Swainson, 1840{{cite book |last1=Swainson |first1=W. |title=A treatise on malacology or shells and shell-fish |date=1840 |publisher=Longman |location=London |page=337 |url=http://www.biodiversitylibrary.org/item/33450}}

| synonyms =

• Carinifex W. G. Binney, 1864
• Helisoma (Helisoma) Swainson, 1840
• Planorbis (Carinifex) W. G. Binney, 1864
• Planorbis (Helisoma) Swainson, 1840

}}

Helisoma is a genus of freshwater air-breathing snails, pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails.

Helisoma snails are an intermediate host of Megalodiscus temperatus.{{cite journal|last1=Bolek|first1=M.G.|last2=Janovy|first2=J.|year=2008|title=Alternative life cycle strategies of Megalodiscus temperatus in tadpoles and metamorphosed anurans|journal=Parasite|volume=15|issue=3|pages=396–401|citeseerx=10.1.1.621.1582|doi=10.1051/parasite/2008153396|issn=1252-607X|pmid=18814713}} {{open access}}