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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....


Josh Smith
Department of Earth and Environmental Science
University of Pennsylvania
240 South 33rd Street
Philadelphia, PA 19104-6316
Project Director, Bahariya Dinosaur Project (http://www.egyptdinos.org)

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