| Sulcusuchus Temporal range: Late Cretaceous |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Sauropsida |
| Superorder: | Sauropterygia |
| Order: | Plesiosauria |
| Suborder: | Plesiosauroidea |
| Family: | Polycotylidae |
| Genus: | Sulcusuchus |
| Species: | S. erraini |
Sulcusuchus is a genus of polycotylid plesiosaur from the Late Cretaceous of Argentina.
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