Revised Ornithischian Classification

["Ken Kinman" <kinman@hotmail.com>]

Dear All,
     I finally decided to update my classification of Ornithischiformes.  
One major change is a return to a more inclusive Family 
Hypsilophodontidae---the paraphyly of that mess is better handled at generic 
level, and I break that family down to show one possible topology (although 
it remains very unsettled):
ORDER ORNITHISCHIFORMES
  1  Pisanosauridae
  2  Lesothosauridae
  3  Scutellosauridae
  B  Ankylosauridae
  4  Plesion _Emausaurus_
  B  Stegosauridae
  5  Plesion _Echinodon_
  6  Thescelosauridae
  7  Plesion _Agilisaurus_
  8A  Heterodontosauridae
   B  Stenopelicidae
   C  Pachycephalosauridae
   D  Chaoyangsauridae
   E  Psittacosauridae
   F  Protoceratopsidae
 _a_ Ceratopsidae
  9  Plesion _Bugenasaura_
  ?  Plesion _Jeholosaurus_
 10  Hypsilophodontidae
          1  Plesion "Y." multidens
          B  Othnielia (incl. Drinker)
          C  Zephyrosaurus
          D  Orodromeus
          2  Hypsilophodon
          3  Parksosaurus
          ?  Gasparinisaura
          4  Rhabdodon
          ?  Yandusaurus
          5  Tenontosaurus
          6  Muttaburrasaurus
          7  {{Dryosauridae to
              Hadrosauridae}} (dryomorphs)
_1_  Dryosauridae
 2   Camptosauridae
 3   Iguanodontidae
_a_  Hadrosauridae
******************************************
    The placements of Bugenasaura and Jeholosaurus are particularly 
uncertain, and either of them could end up being moved higher in the 
classification or down into Hypsilophodontidae.  Constructive criticism is 
welcome.
              ------Ken Kinman


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