Prehistoric Life Prehistoric Secrets in Stone The Earliest Fossils The Silurian Reef Trilobites Fish The Coal Forests Early Reptiles and Amphibians Sea Reptiles Flying Reptiles The Teeming Seas Hunting Dinosaurs Biggest Dinosaurs Two-Footed Plant Eaters Plated and Armoured Dinosaurs Horned Dinosaurs The Mammal Age Dawns Grassland Mammals The Ice Age

Choose a Page:Early Reptiles and AmphibiansReptile EvolutionWestlothianaDimetrodonFootprintsEryopsThecodontianCynognathus*Ichthyosaur Backbones*Baby IchthyosaurIchthyosaur JawsMosasaurusTooth Marks Ichthyosaur Backbones The disc-shaped backbones (vertebrae) of Ichthyosaurs are often found in rocks from Jurassic times.   Previous: Back Book: Prehistoric Life Section: Prehistoric Chapter: Early Reptiles and Amphibians