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

Quick facts about Leptocleidus:

  • Existed from Lower Cretaceous Epoch to 100.5 million years ago
  • Lived in a marine habitat
  • Was a carnivore
  • Reproduced by live birth
  • 7 different specimens have been found by paleontologists

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

Leptocleidus was described by the following scientific paper(s):
  • J. A. Long and A. R. I. Cruickshank. 1996. First record of an Early Cretaceous theropod dinosaur bone from Western Australia. Records of the Western Australian Museum 18:219-222
  • A. Bartholomai. 1966. The discovery of plesiosaurian remains in freshwater sediments in Queensland. The Australian Journal of Science 28(11):437
  • B. P. Kear. 2007. A juvenile pliosauroid plesiosaur (Reptilia: Sauropterygia) from the Lower Cretaceous of South Australia. Journal of Paleontology 81(1):154-162