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RE: Tyrannosaurus synapsid properties....
> From: firstname.lastname@example.org [mailto:email@example.com]On Behalf Of
> chris brochu
> > How is the fact that Tyrannosaurus Rex is synapsid in its
> post orbital area
> >of its skull signifigant? Or, am I wrong in assuming that it is synapsid?
> It's as diapsid as any other theropod, but the supratemporal fenestrae are
> not very visible in lateral view - you more or less have to be looking
> straight down on the skull to see them.
With the forward-facing squamosal-quadratojugal flange almost reaching the
anterior margin of the lateral temporal fenestra in some specimens,
tyrannosaurids are almost "triapsid"!
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
College Park, MD 20742
Phone: 301-405-4084 Email: firstname.lastname@example.org
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796