Lepidosauromorpha is a group of reptiles comprising all diapsids closer to lizards than to archosaurs (including crocodiles and birds). The only living sub-group is the Lepidosauria: extant lizards, snakes, and tuatara. They first appeared during the Late Permian.

ClassificationEdit

• Subclass Diapsida
  • Infraclass Lepidosauromorpha
    • Acerosodontosaurus †^{[citation needed]}.
    • Superorder Sauropterygia - Plesiosaurs †
    • Lepidosauriformes
      • Order Eolacertilia †
      • Superorder Lepidosauria
        • Order Sphenodontia - Tuatara
        • Order Squamata
          • Suborder Lacertilia* - Lizards
            • Family Mosasauridae
          • Suborder Serpentes - Snakes
          • Suborder Amphisbaenia - Worm lizards