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Re: Irritator and Spinosaurids
>I'd like to fly an highly speculative kite for the troops to take shots at.
>I've just got hold of the description of Irritator and a few points
>strikeme as very interesting. The authors note that there is a similarity
>between the teeth of Irritator and those of Spinosaurids. I was also
>struck by the similarity of Irritator to Baryonyx in gross skull shape,
>mostly the long low shape, the placement of the nostrils far back from
>the snout tip and the strong postero-lateral inclination of the ramus of
>the lacrimal that forms the preorbital bar. Perhaps Irritator is indeed a
>spinosaurid and spinosaurids are infact coelurosaurs (bullatosaurs even?)
>rather than megalosauroids.This may help explain the Baryonyx-like
>features seen in the jaw of the coelurosaur, Archaeornithoides.
Very interesting hypothesis! Incidentally, A. Kellner has mentioned (but not
described in detail) a SPINOSAURID from the Santana!
Thomas R. Holtz, Jr.
Dept. of Geology
University of Maryland
College Park, MD 20742