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Re:



there is a 100% (as far as I know) diagnostic trait inherent in Daspletosaur
teeth and not seen in other tyrranasaur teeth....

if you look at the face of the tooth, right along the edge next to the
serration, there is a "wrinkle" that extends out ever so slightly.

To my knowledge, this wrinkle is seen only in Daspletosaur teeth.  Once
you've seen it, you wonder how you could have missed it so many times
before!!
----- Original Message -----
From: "Josh Smith" <smithjb@sas.upenn.edu>
To: "henry mendoza" <hxmendoza@yahoo.com>
Cc: <dinosaur@usc.edu>
Sent: Wednesday, March 13, 2002 12:05 PM


> Quoting henry mendoza <hxmendoza@yahoo.com>:
>
> > Hi Dr. Holtz
> >
> > Thought:
> >
> > No one has ever made mention of a feature on
> > Daspletosaurs teeth which I believe may be diagnostic.
> >
> > A few years back I purchased a Cast of a
> > Daspletosaurus tooth from the Museum of the Rockies. I
> > immediately noticed how far down to the base the
> > anterior serration line goes down, about 4/5 too the
> > level of the end of the posterior serrations.
> >
> > Since then I have noticed this same feature on all the
> > supposed Dapletosaurus teeth and tooth cast that i hve
> > looked at. T. rex and albertosaur/gorgosaur teeth
> > predominantly have serations that either go down
> > half-way to the base or 2/3 the way down in relation
> > to the posterior serration. In a close up, face on pic
> > i saw of the type Daspletosaurus mount's skull I can
> > clearly see this same trait!
> >
> > Yet I have never seen thisissue discussed anywhere!
> >
> > Comments?
> >
> > Henry Mendoza
> >
> This IS an interesting feature to be sure.  Too bad it isn't restrictred
> to tyrannosaurids....
>
> -J
>
>
> ----
> Josh Smith
> Department of Earth and Environmental Science
> University of Pennsylvania
> 240 South 33rd Street
> Philadelphia, PA 19104-6316
> smithjb@sas.upenn.edu
> Project Director, Bahariya Dinosaur Project (http://www.egyptdinos.org)
>
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