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Re: Eustreptospondylus

On Fri, 31 May 1996 NJPharris@aol.com wrote:

> This is a neotetanuran (non-megalosaur tetanuran) synapomorphy,
> correct?

I used to think so now I'm not so sure. In the museum of Victoria,
here in Melbourne, there is a good cast of the maxilla of Megalosaurus
on display, it clearly shows a maxillary fenestra! Go figure. My best
guess is that a fenestra between the lateral wall of the maxilla and
the maxillary sinus but with the medial wall remaining closed) is an
apomorphy for the for the Tetanurae as a whole. It would then be
secondarily lost in Torvosaurus.

Adam Yates