| 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 |
| 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:
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Media related to Anisus vortex at Wikimedia Commons