| Futabasaurus Temporal range: Late Cretaceous (Santonian)
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| Reconstructed skeleton at National Science Museum, Tokyo | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | †Sauropterygia |
| Order: | †Plesiosauria |
| Family: | †Elasmosauridae |
| Genus: | †Futabasaurus Sato, Hasegawa & Manabe, 2006 |
| Species: | †F. suzukii
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| Binomial name | |
| †Futabasaurus suzukii Sato, Hasegawa & Manabe, 2006
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Futabasaurus is a genus of plesiosaur from the Late Cretaceous of Fukushima, Japan. It was described and named in 2006, and was assigned to the family Elasmosauridae. The genus contains one species, F. suzukii.