RE: Tyrannosaurus synapsid properties....

["Thomas R. Holtz, Jr." <tholtz@geol.umd.edu>]

> From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
> Dinogeorge@aol.com
>
> In a message dated 8/28/00 7:45:17 AM EST, tholtz@geol.umd.edu writes:
>
> << With the forward-facing squamosal-quadratojugal flange almost
> reaching the
>  anterior margin of the lateral temporal fenestra in some specimens,
>  tyrannosaurids are almost "triapsid"! >>
>
> This actually happens with Cryolophosaurus.

Or, more accurately, it is what is described in _Cryolophosaurus_.  Since
there is some damge in the skull in that region, the sutures are somewhat
harder to make out than shown on the line drawings.

                Thomas R. Holtz, Jr.
                Vertebrate Paleontologist
Department of Geology           Director, Earth, Life & Time Program
University of Maryland          College Park Scholars
                College Park, MD  20742
http://www.geol.umd.edu/~tholtz/tholtz.htm
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