Re: R: Tyrannosaurs, dwarf, early, and otherwise...

["Thomas R. Holtz, Jr." <th81@umail.umd.edu>]

At 06:28 PM 7/13/99 +0200, Alessandro Marisa wrote:
>
>Sorry, but I don't think that Siamotyrannus is an earliest Tyrannosaurids, I
>think that _Siamo_ is a Sinraptoridae, there are some evidence in the pelvic
>girdle.

There are indeed reason to question the tyrannosaurid placement of _Siamo._.
However, the condition of the oburator notch in it and in _Sinraptor dongi_
is a bit problematic (especially in the latter: is it real, pathological, or
postmortem damage?).  Are there other derived pelvic characters you have
noticed linking _Siamo._ and Sinraptoridae?

                        Thomas R. Holtz, Jr.
                        Vertebrate Paleontologist
Deptartment of Geology                  Director, Earth, Life & Time Program
University of Maryland                  College Park Scholars
College Park, MD  20742       
Webpage: http://www.geol.umd.edu        Phone:301-405-4084
Email:tholtz@geol.umd.edu               Fax:  301-314-9661