| Osmakasaurus
Temporal range: Valanginian, 137 Ma
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Neornithischia |
| Clade: | †Ornithopoda |
| Clade: | †Ankylopollexia |
| Clade: | †Styracosterna |
| Genus: | †Osmakasaurus McDonald, 2011 |
| Species: |
†O. depressus
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| Binomial name | |
| †Osmakasaurus depressus (Gilmore, 1909) | |
| Synonyms | |
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Osmakasaurus (meaning "canyon lizard", ósmaka meaning "canyon" in the Lakota language) is a genusofherbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the Early Cretaceous period (Valanginian age) in what is now Buffalo GapofSouth Dakota, United States. It is known from the Chilson Member of the Lakota Formation. This genus was named by Andrew T. McDonald in 2011 and the type speciesisO. depressus.[1]
The holotype, USNM 4753, was discovered by Nelson Horatio Darton in 1896 within a layer of the Lakota Formation. The type species O. depressus was previously referred to as Camptosaurus depressus, and was first described in 1909 by Charles W. Gilmore.[2][1] It was assigned to the genus PlanicoxaasPlanicoxa depressa in 2008.[3] In 2011, it was assigned to the new genus Osmakasaurus.[1]
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| Osmakasaurus |
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