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preliminary ornithischian classification

Dear All,
Here is my preliminary classification of Ornithischiformes. Haven't started putting in any plesion taxa yet (except the first one). By the way, has a formal Family "Pisanosauridae" been proposed yet? Comments welcome as always.
----------Ken Kinman
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ORDER ORNITHISCHIFORMES (ornithiscians; predentates)

      1  Plesion _Pisanosaurus_
      2  Fabrosauridae
     3A  Ankylosauridae
      B  Stegosauridae
     4A  Pachycephaosauridae
      B  Psittacosauridae
      C  Protoceratopsidae
     _a_ Ceratopsidae
      5  Heterodontidae
      6  Zephyrosauridae
      B  Othnieliidae
      7  Hypsilophodontidae
      8  Camptosauridae (incl. dryosaurids)
     _a_ Hadrosauridae (incl. Iguanodon)
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