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Re: Pre-archosaur...was : What came before Eoraptor?



-----Original Message-----
From: T. Mike Keesey <tmk@dinosauricon.com>
To: Larry Febo <larryf@capital.net>
Cc: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Friday, April 07, 2000 1:19 PM
Subject: Re: Pre-archosaur...was : What came before Eoraptor?


>I have a couple of cladograms at
><http://dinosauricon.com/taxa/archosauromorpha.html>.
>
>The first is an attempt at a general consensus. The second is based on the
>more heterodox one at Dave Peters' site.
>>

I`m not sure I like either of them. In Dave Peter`s, Prolacertiforms are
grouped under Ornithodirans, but I thought to qualify as Ornithodiran, it
must have an "advanced mesotarsal" ankle, and I thought that prolacertilians
had not yet achieved that feature.