| Placodontia Temporal range: Early Triassic – Late Cretaceous | |
|---|---|
| |
| Thalassomedon hanningtoni | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| clade: | Pantestudines |
| Superorder: | †Sauropterygia Owen, 1860 |
| Subgroups | |
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Sauropterygia is a superorder of diapsid reptiles that existed from the early Triassic to the late Cretaceous. This is the order of Nothosaurs, Placodonts, and Plesiosaurs.