| Picrocleidus Temporal range: Middle Jurassic,
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| Fossils from both specimens of P. beloclis | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | †Sauropterygia |
| Order: | †Plesiosauria |
| Family: | †Cryptoclididae |
| Genus: | †Picrocleidus Andrews, 1910 |
| Type species | |
| †Picrocleidus beloclis Andrews, 1910
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| Synonyms | |
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Picrocleidus is an extinct genus of plesiosaur from the Middle Jurassic Oxford Clay Formation (Callovian stage) of the United Kingdom.