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RE: Turtle ancestry (somewhat off-topic)



Dinogeorge@aol.com wrote:

>To this end, wait till you see the creature that Alex Downs has been
working
>on from the Ghost Ranch Coelophysis blocks: it looks like an aetosaur with
a
>toothed turtle's skull. Nearly complete skeleton a couple of feet long with
>most dermal armor in place. Don't know when he'll publish it, but it is
>forthcoming. Maybe turtles >are< highly derived archosaurs after all. Can
say
>no more now.

So, where does that leave Michael Lee's idea that turtles and pareiasaurs
are sister groups? And what does Maisey at the AMNH have to say about
this?<<

This all depends on what part of the skeleton you look at, or DNA. If you
look just at the skull, its an Anaspid, if you look at the skeleton, a
Diapsid and the DNA, an Archosauromorph.
If it is a Diapsid, the skull holes are secondarly closed.
Very confusing, to say the least.

Tracy