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The Plesiosauria or plesiosaurs are an order or clade of extinct Mesozoic marine reptiles, belonging to the Sauropterygia. Plesiosaurs first appeared in the latest Triassic Period, possibly in the Rhaetian stage, about 203 million years ago. They became especially common during the Jurassic Period, thriving until their disappearance due to the…
History & Culture
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| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Plesiosaur | related to American discoveries | In | 0.60 | section |
| Plesiosaur | related to American discoveries | England | 0.60 | section |
| Plesiosaur | related to American discoveries | While | 0.60 | section |
| Plesiosaur | related to American discoveries | German | 0.60 | section |
| Plesiosaur | related to American discoveries | American Cretaceous Western Interior | 0.60 | section |
| Plesiosaur | related to American discoveries | Seaway | 0.60 | section |
| Plesiosaur | related to American discoveries | Niobrara Chalk | 0.60 | section |
| Plesiosaur | related to American discoveries | One | 0.60 | section |
| Plesiosaur | related to American discoveries | Bone Wars | 0.60 | section |
| Plesiosaur | related to American discoveries | Edward Drinker Cope | 0.60 | section |
| Plesiosaur | related to American discoveries | Othniel Charles Marsh | 0.60 | section |
| Plesiosaur | related to American discoveries | Theophilus Turner | 0.60 | section |
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