Re: south american theropods

[Waylon Rowley <whte_rbt_obj@yahoo.com>]

Steven Coombs wrote:

> Or that part was filled up with air, I wouldn't want
> to be the one walking around with that big head, 
> fill with that much muscle mass.

   I suppose that's possible, but I don't see any
indications of it. I thought the whole purpose of
having an infratemporal fenestra was to provide a
window which the adductor muscles could bulge out
through. It would be strange for a dinosaur to evolve
a sinus in that position. The most posterior facial
diverticulum I know of is the suborbital one shown in
this pic:
http://www.oucom.ohiou.edu/dbms-witmer/images/Allosaurus_copy.gif
 

Cheers,
Waylon Rowley

"My train of thought has become a runaway caboose."  

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