| Tiamat valdecii Temporal range: 'mid'-Cretaceous,
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|---|---|
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| Skeletal reconstruction | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Clade: | †Macronaria |
| Clade: | †Titanosauria |
| Genus: | †Tiamat Pereira et al., 2024 |
| Species: | †T. valdecii
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| Binomial name | |
| †Tiamat valdecii Pereira et al., 2024
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Tiamat (after the Mesopotamian mythical goddess) is an extinct genus of titanosaurian sauropod dinosaur from the 'mid'-Cretaceous Açu Formation of Brazil. The genus contains a single species, T. valdecii, known from several caudal vertebrae.