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Re: di-NO!-tyrannus



In a message dated 7/2/03 12:10:53 PM EST, mightyodinn@yahoo.com writes:

<< > >      | -+--Tyrannosaurus (Daspletosaurus) torosus
 > >      |  `--+--Tyrannosaurus (Tyrannosaurus) bataar (=efremovi, 
novojilovi,
 Gorgosaurus lancinator)
 > >      |     `--Tyrannosaurus (Tyrannosaurus) rex (=Dynamosaurus 
imperiosus) >>

I would strongly disagree(!) with making Daspletosaurus and Tarbosaurus 
subgenera of Tyrannosaurus. Daspletosaurus is much more similar to 
Albertosaurus, 
and Tarbosaurus is right off that whole North American tyrannosaur branch. 
Daspletosaurus might share a few apomorphies with Tyrannosaurus, but that only 
suggests that Tyrannosaurus descended from some Daspletosaurus-like albertosaur.