RE: maxillary fenestration & WHAT are "segnosaurs"?

["Tracy Ford" <dino.hunter@home.com>]

-----Original Message-----
From: Jaime A. Headden [mailto:qilongia@yahoo.com]
Sent: Thursday, June 28, 2001 7:46 PM
To: dinosaur@usc.edu
Cc: dino.hunter@home.com
Subject: RE: maxillary fenestration & WHAT are "segnosaurs"?


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?<<

1) The feet for a big one the others are in the Archive that George as
exponded on, and on, and on...

2) I have no problem with the jaw being a therizinosaurid, its the rest of
the skeleton that I have a problem with. The jaw is to small to go with the
skeleton (as I've said numerous times on the list).

Tracy