I Say, When Was That, Again?

• MESOZOIC: 245 to 65 million years ago

  • Triassic (245-208 million years ago):

    • radiation of crocodile-like archosaurs
    • oldest true dinosaurs
    • various marine reptiles (not all of them archosaurs!) begin appearing
  • Jurassic (208-145 million years ago):

    • first modern Crocodylia; first pterosaurs
    • dinosaurs radiate extensively
    • first birds, derived from a dinosaurian lineage

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