''Helisoma'' is a genus of freshwater air-breathing snail, a

pulmonate Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includ ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family Planorbidae, the ram's horn snails. Synonym: * '' Carinifex'' Binney, 1864 ''Helisoma'' snails are an intermediate host of ''

Megalodiscus temperatus ''Megalodiscus temperatus'' is a Digenean in the phylum Platyhelminthes. This parasite belongs to the Cladorchiidae family and is a common parasite located in the urinary bladder and rectum of frogs. The primary host is frogs and the intermedi ...

''.

Species

Species within the genus ''Helisoma'' include: * ''

Helisoma anceps ''Helisoma anceps'', common name the two-ridge rams-horn, is a species of air-breathing freshwater snail, a pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.Bouchet, P. (2011). ''Helisoma anceps'' (Menke, 1830). Acces ...

'', sometimes known as ''

Planorbella ''Planorbella'' is a genus of freshwater air-breathing snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails, or planorbids, which all have sinistral, or left-coiling, shells. Ecology Species in this genu ...

anceps'' * ''Helisoma campanulatum'' (Say, 1821) : synonym of ''

Planorbella campanulata ''Planorbella campanulata'' is a species of gastropods belonging to the family Planorbidae Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod mol ...

'' (Say, 1821)

References

Planorbidae {{Planorbidae-stub