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Re: On diagnosing _Tyrannosaurus_

In a message dated 5/24/01 5:11:52 PM EST, Mickey_Mortimer11@email.msn.com 

<< However, this was before Nanotyrannus and Dinotyrannus were synonymized 
with T. rex, so some of these characters may no longer be applicable. >>

Yes, that's part of the problem. Not enough features have been described in 
the literature to tell whether or not N (and D, and Stygivenator) really are 
juvenile T. rex. For now, I think it is reasonable to accept that these 
species are based on juvenile T. rex fossils, particularly since Carr has 
shown rather conclusively that these are juveniles of >some< kind of 
tyrannosaurid. T. rex is the only one available from their horizon.