Seeleyosaurus was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs.

All these Seeleyosaurus pictures were collected from the internet. Enjoy and explore:

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