Styxosaurus
Reptiles
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Styxosaurus is a genus of plesiosaur of the family Elasmosauridae. Styxosaurus lived during the Campanian age of the Cretaceous period. Three species are known: S. snowii, S. browni, and S. rezaci. Wikipedia
Length: 36 – 39 ft.
Scientific name: Styxosaurus (Hell-river reptile)
Class: Reptilia
Genus: †Styxosaurus; Welles, 1943