Hippeutis complanatus
Conservation status
Least Concern (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Superorder:	Hygrophila
Family:	Planorbidae
Genus:	Hippeutis
Species:	H. complanatus
Binomial name
Hippeutis complanatus (Linnaeus, 1758)[2]
Synonyms
List Helix complanata Linnaeus, 1758 Helix fontana [Lightfoot], 1786 Hippeutis (Hippeutis) fontanus ([Lightfoot], 1786) Planorbis (Hippeutis) colchicus Lindholm, 1913 Planorbis (Hippeutis) complanatus (Linnaeus, 1758) Planorbis complanatus (Linnaeus, 1758) Segmentina (Hippeutis) complanata (Linnaeus, 1758) Segmentina complanata (Linnaeus, 1758)

Hippeutis complanatus, or the flat ram's-horn snail, is a species of minute air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk or micromollusk in the family Planorbidae, the ram's horn snails.

Hippeutis complanatus is the type species of the genus Hippeutis.

Distribution

The species is found in the Palearctic zone, including Europe.

• Latvia
• Czech Republic - least concern (LC)^[3]
• Slovakia
• Poland
• Germany
• Austria
• Netherlands^[4]
• Sweden
• British Isles: Great Britain, Ireland

Shell description

This minute shell is almost perfectly planispiral and shaped like a lens. The whorls overlap one another. The shell color varies from offwhite to a brownish yellow.

Ecology

This snail lives in ponds and ditches, and prefers calcium-rich waters.^[5]