Eretmosaurus
| Eretmosaurus Temporal range: Early - Middle Jurassic,  | |
|---|---|
| Neotype specimen of E. rugosus | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Reptilia | 
| Superorder: | †Sauropterygia | 
| Order: | †Plesiosauria | 
| Family: | †Microcleididae | 
| Genus: | †Eretmosaurus Seeley, 1874 | 
| Type species | |
| †Eretmosaurus rugosus Seeley, 1874 | |
| Other species | |
| Synonyms | |
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Eretmosaurus (meaning "oar lizard") is an extinct genus of plesiosaur from the Early and Middle Jurassic of England and Russia. Two species are known: E. rugosus and E. dubius.