Re: Broader than Dinosauria [Additional Info]

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

Ken Kinman (kinman@hotmail.com) wrote:

<By the way, I believe it was one of Jaime's posts that mentions the lack of a 
twist-thumb in
segnosaurs.  If they are the only theropods to lack the twist-thumb, it would 
be interesting to
know why they were the only theropods to have lost it.>

  I overstated myself, slightly. Therizinosaurs do in fact have a slight twist, 
but this is
mediocre, and resembles *Ingenia* and caenagnathids more than anything, even 
though the twist is
not apparent. Ornithomimosaurs do lack the twist primitively, but this seems 
related to feeding
styles. It does nothing to phylogeny, but neither would therizinosaur loss.


=====
Jaime A. Headden

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

__________________________________________________
Do You Yahoo!?
Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger
http://im.yahoo.com