CreatureData

Two-ridge ramshorn

Helisoma anceps (Menke, 1830)

Status not recordedsnails and slugs

The two-ridge ramshorn (Helisoma anceps) is a species in the family Planorbidae.

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Quick facts about the two-ridge ramshorn

Weight
Not recorded
Length
Not recorded
Lifespan
Not recorded
Main food
Not recorded
Habitat
Not recorded
Young per litter or clutch
Not recorded
Conservation status
Not recorded
Countries on record
Not recorded

Where does the two-ridge ramshorn live?

Not recorded

Where has it been introduced?

The Global Register of Introduced and Invasive Species lists the two-ridge ramshorn as introduced in 2 countries.

  1. Germany
  2. Greece

Introduced means brought by people and now present; invasive means the country's checklist records an impact. A species can be native to one part of a country and introduced in another. Source: Global Register of Introduced and Invasive Species (CC BY 4.0).

Is the two-ridge ramshorn endangered?

No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.

How is the two-ridge ramshorn classified?

  1. kingdomAnimalia
  2. phylumMollusca
  3. classGastropoda
  4. familyPlanorbidae
  5. genusHelisoma
  6. SpeciesHelisoma anceps (Menke, 1830)

Synonyms Helisoma anceps var. anticostianum, Helisoma anceps var. bartschi, Helisoma anceps var. idahoense, Helisoma anceps var. politum, Helisoma anceps var. rushi, Helisoma antrosa, Helisoma antrosa var. cahni, Helisoma antrosa var. minnesotensis, Helisoma antrosa var. sayi, Helisoma antrosa var. shellensis, Helix angulata, Planorbella anceps, Planorbis anceps, Planorbis antrosus, Planorbis antrosus antrosus, Planorbis antrosus latchfordi, Planorbis bicarinatus, Planorbis bicarinatus major, Planorbis bicarinatus var. angistomus, Planorbis bicarinatus var. aroostookensis, Planorbis bicarinatus var. corrugatus, Planorbis bicarinatus var. major, Planorbis bicarinatus var. percarinatus, Planorbis bicarinatus var. portagensis, Planorbis bicarinatus var. royalensis, Planorbis bicarinatus var. striatus, Planorbis bicarinatus var. unicarinatus, Planorbis engonatus

Other names and names in other languages (5)
  • Two-ridge rams-hornEnglish
  • Two-ridged rams-hornEnglish
  • Two-ridged ramshornEnglish
  • Planorbe carénéeFrench
  • Hélisome à deux carènesFrench

Catalogue of Life

Relatives of the two-ridge ramshorn

Other species in the same genus Helisoma.

CompareTwo-ridge ramshorn vs Great Basin ramshornTwo-ridge ramshorn vs Helisoma brevispiraTwo-ridge ramshorn vs Helisoma dongdawusuensisTwo-ridge ramshorn vs Greenfield ramshorn

Common questions

Answered only where our data holds the answer.

Is the two-ridge ramshorn an invasive species?

The Global Register of Introduced and Invasive Species lists the two-ridge ramshorn as introduced in 2 countries: Germany and Greece, but does not flag it as invasive in any of them.

Sources and how to cite this page

Data as of 2026-11-14. How this page is put together.

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APA

CreatureData. (2026). Two-ridge ramshorn (Helisoma anceps). Retrieved from https://creaturedata.com/animals/two-ridge-ramshorn

MLA

“Two-ridge ramshorn (Helisoma anceps).” CreatureData, 2026, https://creaturedata.com/animals/two-ridge-ramshorn.

BibTeX
@misc{two_ridge_ramshorn_2026,
  title = {Two-ridge ramshorn (Helisoma anceps)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/two-ridge-ramshorn},
  note = {Data as of 2026-11-14}
}