Anisus vortex

Anisus vortex is a species of small freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails and their allies.^[2]

Anisus vortex
Shells of Anisus vortex
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superorder:	Hygrophila
Family:	Planorbidae
Genus:	Anisus
Species:	A. vortex
Binomial name
Anisus vortex (Linnaeus, 1758)[1]
Synonyms
Helix vortex Linnaeus, 1758

Description

The shell is only 0.8 to 1.1 mm high and measures up to 9 mm in diameter. It has up to 7 whorls. The shell is flattened at the functional lower side, concave at the upper side. On the top, the whorls are flat, separated only by a slightly pronounced seam. On the bottom, however, the whorls are more curved and separated by a distinct suture. Shell with very sharp keel.

Distribution

The range of this species is from Europe across the Palearctic to Siberia. It occurs in countries and islands including:

• Belgium
• Czech Republic^[3] - least concern (LC)^[4]
• Germany^[5]
• Great Britain
• Ireland
• The Netherlands
• Poland
• Slovakia^[3]