Planorbis Temporal range: | |
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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.