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The (brain)case is closed? (Re: Burpee Conference)

Tom, Ken,
So, no chance that this is ontogenetic?
Do any extant reptiles remodel the inside of their braincase as they age?
What does the inside of the Burpee head look like, compared to the
Is there a wide variation in morphology on the inside of the braincases
of adult T. rexes?

I presume that the hypothesis is that as baby T. rexes age, their sensory
apparati would change, because their prey/hunting regime changes as they
get bigger.  Optic lobes would shrink (proportionally, not literally) or
enlarge and olfactory lobes do the same (possibly in reverse compared to
the optic lobes).  The brain stem may have been proportionally bigger in
T. rex babies, perhaps because of activity/coordination differences
between the young and the adults.

CAT scans of soft tissue (brains) show that morphology differences are
quite significant between baby and adult mammals, particularly in the
highly altricial ones like primates.


On Tue, 20 Sep 2005 08:50:29 -0600 Ken.Carpenter@dmns.org writes:
> I am surprised that Holtz hasn't said anything about the Burpee
> tyrannosaur conference, so I'll force this hands ;-)
> There were several talks that were previously given at the Hill 
> City
> conference, and several new ones mostly about Nannotyrannus being 
> valid
> or a juvenile Tyrannosaurus. The most interesting in this regards 
> was
> the CAT-scan data of the braincase of the holotype - definitely not 
> a
> Tyrannosaurus. 
> Take it alway Thomas.....!
> Kenneth Carpenter, Ph.D.
> Curator of Lower Vertebrate Paleontology/Chief Preparator
> Department of Earth Sciences
> Denver Museum of Nature & Science
> 2001 Colorado Blvd.
> Denver, CO 80205
> Phone: 303-370-6392
> Fax: 303-331-6492
> ************************************************************
> for PDFs of some of my publications, as well as information of the 
> Cedar
> Mountain Project: 
> https://scientists.dmns.org/sites/kencarpenter/default.aspx