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Re: New paper on the origin and early evolution of dinosaurs



On Sun, Nov 8, 2009 at 7:39 PM, Tim Williams <tijawi@yahoo.com> wrote
> It is therefore possible that pterosaurs might have branched off quite late, 
> around the same time as the dinosaurs.  In fact, maybe pterosaurs are 
> themselves dinosaurs.  I'm going to stick my neck out here and say that I 
> wouldn't be at all surprised if future analyses show pterosaurs to be nested 
> inside Saurischia.  It would mean that the axial air sacs (and flow-through 
> respiratory system) shared by saurischians and pterosaurs have a single 
> origin.  It's a crazy idea, I know.  But not *that* crazy.
>
As well as filamentous integumentary structures....

Cheers,
Nick