| Caseosaurus Temporal range: Norian,
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| Holotype ilium in lateral and medial view | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Genus: | †Caseosaurus Hunt et al., 1998 |
| Type species | |
| †Caseosaurus crosbyensis Hunt et al., 1998
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Caseosaurus (/ˌkeɪzioʊˈsɔːrəs/ KAY-zee-oh-SOR-əs) is a genus of saurischian dinosaur that lived approximately 221.5 to 212 million years ago during the latter part of the Triassic Period in what is now Texas, North America. It was a small, lightly-built, bipedal, ground-dwelling carnivore, and could grow up to 2 m (6.6 ft) long.