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In a message dated 98-01-24 22:03:06 EST, firstname.lastname@example.org writes:
<< > There are enough differences among the teeth of the different groups to
> the hypothesis of a common origin for serrated theropod teeth questionable.
> this, I see more evidence against the common-origin hypothesis than for it.
The different styles of teeth could be modifications of a serrated
ancestor just as easily as they could of an unserrated ancestor.
Of course. But it's no longer a sure thing.