bird-mammal common ancestor

matt spitzer mwspitze at
Mon Sep 12 21:33:10 EST 1994

In article <mturner.279.00120319 at>, mturner at
(mel turner) wrote:

> Well, many fossil skulls give endocasts that do say something useful about 
> brain structure.   I think quite a bit is known about the brains of several 
> fossil groups.

True, but in this case one would need to know details of cytoarchitecture
and neuronal projections

>  A better answer is to use the related-outgroup comparison method:  
> basic  logic: those characteristics found in  some members of a variable group 
> that are also found in  related outgroups  are the primitive conditions for 
> the variable group).  

Thank you.  I think this is the answer I was looking for.

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