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>There are only a few juvenile/sub-adult specimens of Tyrannosaurus rex
>(AMNH 5005, AMNH 21542, CMNH 7541, "Tinker"). >
I've been told that the lower jaw of "Tinker" is almost as big as AMNH
5027, which would hardly make it a juvenile, and that this would have
important bearing on the idea that the adult T.rex-like tooth morphology of
Tinker suggests that Nanotyrannus is not a T.rex juvenile. If Tinker is
almost fully grown, there is still no reason why you couldn't have a change
in tooth morphology between juveniles ("Nanotyrannus") and adults.
He who stops at being better stops being good.
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-Marie von Ebner Eschenbach
Jeffrey W. Martz
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