Choanomphalus
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| Choanomphalus | |
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| An apertural view of the shell of Choanomphalus maacki | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Superorder: | Hygrophila |
| Family: | Planorbidae |
| Subfamily: | Planorbinae |
| Tribe: | Planorbini |
| Genus: | Choanomphalus Gerstfeldt, 1859[1] |
Choanomphalus is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.