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Re: Validity of Alioramus



Randall Irmis wrote:

>>Speaking of problematic tyrannosaurids, what is the current view of
Nanotyrannus?<<

The most recent I've read is:

Carr, Thomas D. 1999. Craniofacial ontogeny in Tyrannosauridae (Dinosauria,
Coelurosauria). Journal of Vertebrate Paleontology 19(3):497-520.

Carr considers _Nanotyrannus lancensis_ a subjective junior synonym of
_Tyrannosaurus rex_, on the basis of numerous characters, including the low
and elongate snout, the presence of immature bone grain on the cortical
surface of CMNH 7541, separate nasals and frontal, a circular orbit, an
inflated ectopterygoid, etc.

Caitlin R. Kiernan