Seeleyosaurus was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs. The first Seeleyosaurus fossil was discovered in 1940.

Quick facts about Seeleyosaurus:

  • Existed from Pliensbachian Age to 182 million years ago
  • Lived in a marine environment
  • Was a carnivore
  • Reproduced by live birth
  • 2 different specimens have been found by paleontologists

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

Seeleyosaurus was described by the following scientific paper(s):
  • H. W. Dames. 1895. Die Plesiosaurier der s├╝ddeutschen Liasformation. Abhandlungen der K├Âniglichen Akademie der Wissenschaften zu Berlin 2:1-83
  • F. Westphal. 1962. Die Krokodilier des Deutschen und Englischen Oberen Lias [The crocodiles of the German and English Upper Lias]. Palaeontographica Abteilung A 118(1-3):23-118