RE: maxillary fenestration & WHAT are "segnosaurs"?

["Jaime A. Headden" <qilongia@yahoo.com>]

Tacy Ford (dino.hunter@home.com) wrote:

<I would think that the perfect null hyposis would be to try and
prove Therizinosaurids aren't theropods would be to run good
cladigrams trying to prove that they are prosauropods. I would
like to see this done. Not as just an outgroup. I don't have the
hardware, time or knowledge to do so. If and when this is ever
done would be a great boon for the family.>

  It is actually possible to differentiate the jaws of
segnosaurs from prosauropods. Those features that show segnosaur
jaws are not prosauropod jaws are shared by either theropods
generally, or by maniraptorans, or even oviraptorosaurs
specifically. Otherwise, I'd ask this for a mental excercise
that does not require a cladistic analysis: 1) what features do
you see that prosauropods and segnosaurs share that theropods do
not? and 2) do you consider *Beipiaosaurus* a segnosaur?

=====
Jaime A. Headden

  Aaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhr-gen-ti-na
  Where the Wind Comes Sweeping Down the Pampas!!!!

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