Family Trees

• Amniota

  • Reptilia

    • Sauropsida

      • Archosaurs

        • Ornithodira

          • Pterosaurs
          • Dinosaurs

            • Saurischians

              • Theropods
              • Sauropods
            • Ornithischians

              • Thyreophorans

                • Stegosaurs
                • Ankylosaurs
              • Cerapods

                • Pachycephalosaurs
                • Ceratopsians
                • Ornithopods
        • Crocodilians
      • Turtles
      • Squamata (Snakes and Lizards)
    • Ichthyosaurs
    • Sauropterygia

      • Plesiosaurs
      • Nothosaurs
  • Synapsids

    • Mammals