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Re: How Did Hadrosaurs Survive? (Was: Hadrosaur "mummy" questions)




From: Sean Carroll <sean@kua.net>
Reply-To: sean@kua.net
To: dinosaur@usc.edu
Subject: Re: How Did Hadrosaurs Survive? (Was: Hadrosaur "mummy" questions)
Date: Sat, 26 Oct 2002 16:15:36 +0100



Tim Donovan wrote:

>   Hadrosaur diversity apparently waned with the advent of T. rex.

But around the time _T. rex_ appeared, around the Maastrichtian, *all*
dinosaur diversity seems to have been waning.

Only in the Tyrannosaurus environments. It is noteworthy that Lockley et al report no evidence of diversity decline in the late Maastrichtian of South America.


Didn't _Triceratops_ alone
make up 70% of some entire fauna in those times?

It does appear dominant in the near coastal environments, based on skeletal remains.




-- --Sean http://www.livejournal.com/users/spclsd223/


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