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



In a message dated 11/16/99 12:44:36 AM Pacific Standard Time, 
mickey_mortimer@email.msn.com writes:

> Also, what makes Siamotyrannus' (Berriasian-Barremian)
>  referral to the Tyrannosauroidea ambiguous?  It seems to share quite a few
>  synapomorphies with tyrannosaurids.

Admittedly, this is an odd-looking specimen, but certain list members think 
the pelvis in particular (especially the ilium) has more in common with 
allosauroids than tyrannosaurs.

--Nick P.