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Re: Archosaur origins (was reply to Euparkeria)

> When I read the older literature about the origins of Archosauria proper, two 
> different theories/points of view seemed to emerge.
> First, there is the theory of Proterosuchia (is this still a valid 
> monophyletic taxon?)
     As I recall, erythrosuchids used to be included witht he
proterosuchids, in which case the group would be paraphyletic. Whether
this is invalid or not is a whole nother can of worms...       
LN Jeff