| Zephyrosaurus Temporal range: Early Cretaceous,
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| Mounted skeleton, Natural History Museum of Denmark | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Neornithischia |
| Family: | †Thescelosauridae |
| Subfamily: | †Orodrominae |
| Genus: | †Zephyrosaurus Sues, 1980 |
| Type species | |
| †Zephyrosaurus schaffi | |
Zephyrosaurus (meaning "westward wind lizard") is a genus of orodromine ornithischian dinosaur. It is based on a partial skull and postcranial fragments discovered in the Aptian-Albian-age Lower Cretaceous Cloverly Formation of Carbon County, Montana, USA. New remains are under description, and tracks from Maryland and Virginia, also in the US, have been attributed to animals similar to Zephyrosaurus. It lived approximately 113 mya.