Anisus vortex | |
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Shells of Anisus vortex | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Heterobranchia |
Superorder: | Hygrophila |
Family: | Planorbidae |
Genus: | Anisus |
Species: | A. vortex
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Binomial name | |
Anisus vortex | |
Synonyms | |
Helix vortex Linnaeus, 1758 |
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]
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.
The range of this species is from Europe across the Palearctic to Siberia. It occurs in countries and islands including: