Re: Nemegtian Tyrannosaurs

[Dinogeorge@aol.com]

In a message dated 5/24/03 3:49:05 AM Pacific Daylight Time, uwrk@yahoo.com 
writes:

<< Maybe because of environmental differences. Temperature extremes may have 
been greater in the far inland central Asian environment, whereas T. rex's 
habitat had the mitigating effect of the nearby sea. Juveniles were more 
vulnerable and could have been more seriously affected in the Nemegt. >>

This all seems like explanations piled on explanations and speculation piled 
on speculation. Maybe this, maybe that. Perhaps this, perhaps that. We really 
have no idea why the fossil record of T rex differs from the fossil record of 
T bataar and T efremovi. The most parsimonious explanation would be that T 
bataar is a different species from T efremovi and that both are different 
genera 
from T rex. Whether this is the correct explanation we cannot verify from the 
information we presently have available.