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RE: Tyrannosaur analogs in the south?



> From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu]On Behalf Of
> Richard W. Travsky
>
> > The Late Cretaceous top predators of Gondwana were the Abelisauridae.
> > Not as big as the tyrannosaurids, nor were they particularly cursorial,
> > but like their distant northern kin they had stumpy arms.
>
> Would that be a result of common origins or "lifestyle"?

Lifestyle (aka "convergence"), as more primitive tyrannosauroids (_Guanlong_, 
for example) and other coelurosaurs and basal
tetanurines have much longer arms than tyrannosaurids.

                Thomas R. Holtz, Jr.
        Senior Lecturer, Vertebrate Paleontology
Department of Geology           Director, Earth, Life & Time Program
University of Maryland          College Park Scholars
        Mailing Address:
                Building 237, Room 1117
                College Park, MD  20742

http://www.geol.umd.edu/~tholtz/
http://www.geol.umd.edu/~jmerck/eltsite
Phone:  301-405-4084    Email:  tholtz@geol.umd.edu
Fax (Geol):  301-314-9661       Fax (CPS-ELT): 301-405-0796