Planorbis
| Planorbis Temporal range: | |
|---|---|
| Drawing of a shell of Planorbis planorbis | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Superorder: | Hygrophila |
| Family: | Planorbidae |
| Subfamily: | Planorbinae |
| Tribe: | Planorbini |
| Genus: | Planorbis O. F. Müller, 1774 |
| Species | |
|
See text | |
| Synonyms | |
|
Tropidiscus Stein, 1850 | |
Planorbis is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.