Back Magnosaure Catalan Magnosaurus Czech Magnosaurus nethercombensis Spanish ماگنوسور Persian Magnosaurus French מגנוסאורוס HE Magnosaurus Hungarian Magnosaurus nethercombensis Italian Magnosaurus Dutch Magnozaur Polish
| Magnosaurus Temporal range: Bajocian,
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| Skeletal diagram of the holotype specimen | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Family: | †Megalosauridae |
| Subfamily: | †Afrovenatorinae |
| Genus: | †Magnosaurus Huene, 1932 |
| Type species | |
| †Megalosaurus nethercombensis Huene, 1923
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| Species | |
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Magnosaurus (meaning 'large lizard') was a genus of theropod dinosaur from the Middle Jurassic of England. It is based on fragmentary remains and has often been confused with or included in Megalosaurus.