Back Tietasaura Czech Tietasaura derbyiana Spanish Tietasaura Dutch Tietasaura Portuguese 蒂埃塔龙属 Chinese
| Tietasaura Temporal range: Early Cretaceous,
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| Diagram showing the known distal femur fragment in white, the rest is shown in gray | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Neornithischia |
| Clade: | †Ornithopoda |
| Clade: | †Elasmaria |
| Genus: | †Tietasaura Bandeira et al., 2024 |
| Species: | †T. derbyiana
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| Binomial name | |
| †Tietasaura derbyiana Bandeira et al., 2024
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Tietasaura (meaning "Tieta lizard") is an extinct genus of elasmarian ornithopod dinosaur from the Early Cretaceous Marfim Formation of Brazil. The genus contains a single species, T. derbyiana, known from a single incomplete femur. Tietasaura is notable for being the first ornithischian dinosaur ever named from Brazil.