Pantosaurus was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs. Pantosaurus lived during the Late Jurassic and resided in North America.

All the Pantosaurus illustrations below were collected from the internet. Enjoy and explore:

Pantosaurus was described by the following scientific paper(s):
  • F. R. O'Keefe and H. P. Street. 2009. Osteology of the cryptocleidoid plesiosaur Tatenectes laramiensis, with comments on the taxonomic status of the Cimoliasauridae. Journal of Vertebrate Paleontology 29(1):48-57
  • F. R. O'Keefe and W. Wahl, Jr. 2003. Current taxonomic status of the plesiosaur Pantosaurus striatus from the Upper Jurassic Sundance Formation, Wyoming. Paludicola 4(2):37-46
  • F. R. O'Keefe, H. P. Street, and J. P. Cavigelli, J. J. Socha, R. D. O.'Keefe. 2009. A plesiosaur containing an ichthyosaur embryo as stomach contents from the Sundance Formation of the Bighorn Basin, Wyoming. Journal of Vertebrate Paleontology 29(4):1306-1310