Dinosaur taxonomy, Wikipedia


    Saurischia ("lizard-hipped"; includes Theropoda and Sauropodomorpha)

    Theropoda (all bipedal; most were carnivorous)

     Diplodocoidea (skulls and tails elongated; teeth typically narrow and pencil-like)

     Macronaria (boxy skulls; spoon- or pencil-shaped teeth)

     Brachiosauridae (long-necked, long-armed macronarians)

     Titanosauria (diverse; stocky, with wide hips; most common in the Late Cretaceous of southern continents)

    Ornithischia ("bird-hipped"; diverse bipedal and quadrupedal herbivores)

     Ornithopoda (various sizes; bipeds and quadrupeds; evolved a method of chewing using skull flexibility and numerous teeth)

     Marginocephalia (characterized by a cranial growth)