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Re: Theropod Forelimb Reduction

Dann Pigdon wrote:

> Raptorex had the characteristic 'D-shaped' teeth (in cross section, that
> is) seen in later
> tyrannosaurs. Could it be that a move away from relatively fragile,
> narrow, blade-like teeth
> towards something more capable of withstanding lateral movement meant that
> the jaws took over
> some (or even most) of the role previously played by the forelimbs during
> prey capture?
Well, almost certainly. That is what I, and Eric Snively, and various
others have argued in the past.

Note that the U-shaped incisiform premaxillary teeth do go all the way
down to Proceratosaurus.

Thomas R. Holtz, Jr.
Email: tholtz@umd.edu   Phone: 301-405-4084
Office: Centreville 1216
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
Fax: 301-314-9661

Faculty Director, Earth, Life & Time Program, College Park Scholars
Faculty Director, Science & Global Change Program, College Park Scholars
Fax: 301-314-9843

Mailing Address:        Thomas R. Holtz, Jr.
                        Department of Geology
                        Building 237, Room 1117
                        University of Maryland
                        College Park, MD 20742 USA