Re: tyrannosaurid ancestry, raptors and other fun things...

["T. Mike Keesey" <tkeese1@gl.umbc.edu>]

On Mon, 15 Nov 1999, TRUETT GARNER wrote:

>  Early (possible) members of the tyrannosauroid lineage
> > are not that well known -- _Stokesosaurus_ and _Siamotyrannus_ and
> > _Iliosuchus_ and _Itemirus_. The placement of these animals as
> > tyrannosauroids remains contentious, though.
> > 
> 
> Mike , 
> What is the oldest , unambiguous tyrannosauroid found to date ? My
> references are not clear on this issue . Thanks in advance . 

Seeing as all the non-tyrannosaurid tyrannosauroids are ambiguous, that
would have to be _Alectrosaurus_, from the Turonian(?).

--T. Michael Keesey
tkeese1@gl.umbc.edu | THE DINOSAURICON: http://dinosaur.umbc.edu/
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