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My probably final comments before I leave for the
shores of southern France...
I wrote:
...because the elongated basisphenoid is probably -- I don't know
-- present in every elongated braincase, which may IMHO easily evolve more often
than once; the forked posterior end of the premaxilla is surely not something
that won't evolve twice either, I think (again, I don't know). Also, that it
shares these characters with Syntarsus but -- apparently -- not with
the very similar Coelophysis is, if true, striking.
This "statement" was based on the usually assumed similarities
between Deltadromeus and Dryptosaurus.
HP Rob Gay answered to this:
> Wait and see, coelophysoids are actually the closest ancestor
to
> birds...oy...someone help, it's getting late. Raath 1977 or so, IIRC, had proposed this, based AFAIK largely on
things like fusion in the hip region and other
convergences. |