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lizard & dino lips (was: hadrosaur defence)

On Sun, 11 May 97 15:55:43 -0500 Richard L. Dieterle writes:
>Never kiss a Tyrannosaur on the lips.
Now, that brings up an interesting question.  Did they have lips? 
Lizards don't  (actually, their lips are there, but are very minimal
compared to mammals).  Crocs don't  (again, mimimal).   Tuatara don't. 
Turtles DON'T.  Birds DON'T.  In fact all of the living reptiles or dino
decendents don't.  So, did dinosaurs?  Did some have them and some not? 
Soft tissue doesn't fossilize well, but muscles for manipulation of lips
should have attachment points on the jaws.  So, what evidence do we have
for the existence of dino lips?  What would they have used them for,
besides kissing?
-zenlizard, the only living reptile with well developed lips.