| Argovisaurus Temporal range: Middle Jurassic
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| Holotype block | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Ichthyosauria |
| Node: | †Ophthalmosauria |
| Genus: | †Argovisaurus |
| Species: | †A. martafernandezi
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| Binomial name | |
| †Argovisaurus martafernandezi Miedema et al., 2024
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Argovisaurus (meaning "Aargau lizard") is an extinct genus of ophthalmosaurian ichthyosaur from the Middle Jurassic (Bajocian) Hauptrogenstein Formation of Switzerland. The genus contains a single species, A. martafernandezi, known from a partial skeleton. Argovisaurus was a large ichthyosaur compared to its relatives.