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Re: early tyrannosaurids
> Finally, the late Jurassic (Morrison Fm) Stokesosaurus has been
> suggested by some to share affinities with tyrannosaurids, and some
> have tentatively placed it within the Tyrannosauridae. Chure (1994,
> in his paper describing Koparion) briefly suggested that
> Stokesosaurus' reference to the Tyrannosauridae was strengthened by as
> yet undescribed new material. Can anyone shed more light on this
> material and what it means?
Apparently a braincase has been found in the Cleveland-Lloyd Quarry,
Utah, which may belong to _Stokesosaurus_. According to Dan
Chure, this braincase shows features in common with _Itemirus_ and
the tyrannosaurids. That's according to Dan Chure, anyway.
Jim Madsen actually referred _Stokesosaurus_ to the Tyrannosauridae
back in the '70's based on pelvic material. No one was too keen on
this referral until the braincase turned up. I was so disappointed
that _Stokesosaurus_ wasn't mentioned in the _Siamotyrannus_
paper; features in its pelvis were regarded by the authors as the best
indication of its tyrannosaurid affinities.
On a very wet day in Sydney