Eurycleidus was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs. The first Eurycleidus fossil was discovered in 1922.

Quick facts about Eurycleidus:

  • Existed from Hettangian Age to 183 million years ago
  • Lived in a marine habitat
  • Was a carnivore
  • Reproduced by live birth
  • 4 different specimens have been found by paleontologists

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

Eurycleidus was described by the following scientific paper(s):
  • A. R. I. Cruickshank. 1994. A juvenile plesiosaur (Plesiosauria: Reptilia) from the Lower Lias (Hettangian: Lower Jurassic) of Lyme Regis, England: a pliosauroid-plesiosauroid intermediate?. Zoological Journal of the Linnean Society 112:151-178
  • R. Owen. 1840. Report on British fossil reptiles. Report of the Ninth Meeting of the British Association for the Advancement of Science, Reports on the State of Science
  • A. S. Woodward. 1889. Catalogue of the Fossil Fishes in the British Museum (Natural History) Part 1