| Planorbis Temporal range: | |
|---|---|
| | |
| Drawing of a shell of Planorbis planorbis | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Superorder: | Hygrophila |
| Family: | Planorbidae |
| Subfamily: | Planorbinae |
| Tribe: | Planorbini |
| Genus: | Planorbis O. F. Müller, 1774 [1] |
| Species | |
See text | |
| Synonyms [2] | |
TropidiscusStein, 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. [2]
Planorbis shells are flat-coiled and sinistral.
This genus has a worldwide distribution. It is known from the Jurassic to the Recent periods. [3]
Gyraulus is a genus of small, mostly air-breathing, freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails.
Anisus is a genus of small air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the subfamily Planorbinae of the family Planorbidae, the ramshorn snails and their allies.