Dinosauria
 Ornithischia
    Cerapods
       Marginocephalia
       Ornithopoda
    Thyreophora
       Stegosaura
       Ankylosaurs
 Saurischia
    Sauropomorpha
       Prosauropoda
       Sauropoda
    Theropods
       Ceratosauria
       Titetanurae
Dinosaur Evolution

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