Rhomaleosaurus was a plesiosaur, a type of marine reptile. It was not a dinosaur, though it coexisted with many dinosaurs. The first Rhomaleosaurus fossil was discovered in 1871.

Quick facts about Rhomaleosaurus:

  • Existed from 208.5 million years ago to 174.1 million years ago
  • Lived in a marine habitat
  • Was a carnivore
  • Reproduced by live birth
  • 15 different specimens have been found by paleontologists

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

Rhomaleosaurus was described by the following scientific paper(s):
  • A. S. Smith and G. J. Dyke. 2008. The skull of the giant predatory pliosaur Rhomaleosaurus cramptoni: implications for plesiosaur phylogenetics. Naturwissenschaften 95:975-980
  • M. J. Benton and M. A. Taylor. 1984. Marine reptiles from the Upper Lias (Lower Toarcian, Lower Jurassic) of the Yorkshire coast. Proceedings of the Yorkshire Geological Society 44(4):399-429
  • T. Wright. 1860. On the Zone of Avicula contorta, and the Lower Lias of the South of England. Quarterly Journal of the Geological Society 16:374-411