| Parksosaurus Temporal range: Late Cretaceous,
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| Skull cast of Parksosaurus | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Neornithischia |
| Clade: | †Pyrodontia |
| Family: | †Thescelosauridae |
| Subfamily: | †Thescelosaurinae |
| Genus: | †Parksosaurus C. M. Sternberg, 1937 |
| Species: | †P. warreni
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| Binomial name | |
| †Parksosaurus warreni (Parks, 1926 [originally Thescelosaurus])
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| Synonyms | |
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Parksosaurus (meaning "William Parks's lizard") is a genus of neornithischian dinosaur from the early Maastrichtian-age Upper Cretaceous Horseshoe Canyon Formation of Alberta, Canada. It is based on most of a partially articulated skeleton and partial skull, showing it to have been a small, bipedal, herbivorous dinosaur. It is one of the few described non-hadrosaurid ornithopods from the end of the Cretaceous in North America, existing around 70 million years ago.