| Lourinhasaurus Temporal range: Late Jurassic
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Clade: | †Macronaria |
| Family: | †Camarasauridae |
| Genus: | †Lourinhasaurus Dantas et al., 1998 |
| Species: | †L. alenquerensis
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| Binomial name | |
| †Lourinhasaurus alenquerensis (Lapparent & Zbyszewski, 1957)
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| Synonyms | |
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Lourinhasaurus (meaning "Lourinhã lizard") is an extinct genus of herbivorous sauropod dinosaur genus dating from Late Jurassic strata of Estremadura, Portugal.