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Re: Tyrannosaur species
In a message dated 4/9/99 4:03:57 PM EST, firstname.lastname@example.org writes:
<<Well, a) the skull has been subject to a bit (!) of deformation post-burial,
so we don't know its exact shape; b) all tyrannosaurs go through some pretty
dramatic skull shape changes with growth (the "meat" of Carr's forthcoming
paper); and c) in fact, where there are differences in skull shape between
"Nano" and other small tyrannosaurid specimens, those differences match
adult _T. rex_ specimens! >>
There's also a lot of plaster in the skull that needs to be dealt with, or so
I've heard. Nevertheless,  I think the tooth count is wrong for T. rex (N.
lancensis has too many teeth and so might be a different species of
Tyrannosaurus), and  those dramatic skull growth changes better not be
>too< dramatic, lest we mistake real phyletic differences for ontogenetic
changes (how many growth specimens of T. rex, with skulls, do we have,
anyway?). Should be an interesting study either way.