| Ornithostoma Temporal range: Early Cretaceous,
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| Holotype rostrum fragment | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Order: | †Pterosauria |
| Suborder: | †Pterodactyloidea |
| Clade: | †Azhdarchoidea |
| Genus: | †Ornithostoma Seeley, 1871 |
| Species: | †O. sedgwicki
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| Binomial name | |
| †Ornithostoma sedgwicki Seeley, 1891
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| Synonyms | |
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Ornithostoma (meaning "bird mouth") is a genus of pterodactyloid pterosaur that lived during the Early Cretaceous period (Albian stage) of Europe, around 110 million years ago. Ornithostoma was once thought to have been a senior synonym of the pteranodontid Pteranodon due to its toothless anatomy and prior naming.[1]