bird-mammal common ancestor

[matt spitzer]

In article <mwspitze-060994110940 at phar2.medsurge.hsis.uci.edu>,
mwspitze at uci.edu (matt spitzer) wrote:

> A question for evolutionary biologists:
> 
> What is the current thinking on the common ancestor of birds and mammals? 

So far I have received a number of informative responses.  To summarize
them, it is currently thought that mammals diverged prior to development of
anything like a modern reptile (from which birds diverged much later). 
Does anyone disagree?