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Olfactory Lobes & Large Yixian Theropods (was Re: New here, General Qs)

Bradley Fischer wrote:
2. How does T-Rex brain structure compare with Dromeosaurs and other small theropods?

I recall a post awhile back on the Dinosaur Mailing List that mentions an SVP abstract that discusses how avialans supposedly have reduced olfactory lobes. _Tyrannosaurus bataar_ is described as having large olfactory lobes (Maleev, 1965). _Giganotosaurus carolinii_ appears to have moderately sized olfactory lobes (Coria & Currie, 2002).

On a different topic: In a fairly recent issue of Scientific American, there is an article about the evolution of feathers and their beginnings on theropods. The article suggests that even T-rex probably was feathered. Only problem I have with this theory is that the subject sample is all from china and they found no large theropods with feathers. Anyone care to comment on this? Am I off on my thinking?

Sadly, there are not yet any large theropods recovered from the Yixian Formation. Come to think of it, off hand, I can't think of any large vertebrates from the Yixian. If there are, could someone please list them with length and mass estimates?


Nick Gardner
AIM Eoraptor22


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