Iguana "cheeks" (was RE: Sneak Peak at Yale Torosaurus Sculpture)

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

> In a message dated 9/28/2005 9:47:02 PM Eastern  Standard Time,
> andyfarke@hotmail.com writes:
> << So as a sort of  "compromise" solution, is it possible that the "normal"
> jaw
> musculature  formed a cheek of sorts along the posterior half of the jaw
> (like what you  talked about, Jaime, in some of the "cheeked" birds)?  >>
>
> Lull suggested this in "Revision of the  Ceratopsia" in 1933. He compared the
> structure to that of the Marine Iguana.  See:
>
> http://facweb.furman.edu/~perrytravis/TPerryWebsite/Courses/Espanola%20092.jpg
>
> and
>
> http://www.eeb.cornell.edu/wrege/graphics/res/MarineIguana.gif
>

I've never managed to catch a photo an Amblyrhynchus in mid-yawn, but I DID get 
one of Conolophus (the Galapagos land iguana), so I
just posted it at:
http://www.geol.umd.edu/~tholtz/1824.jpg

                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

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