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Re: Shedding archosaurs?

 I thought turtles (like mammals) were outside of
the archosaur group.


Barring one anomalous molecular study, this is
probably true.

Oh yeah -- there are at least two molecular studies that have found this result. It's morphologically impossible, though.

That is hardly conclusive. The only real argument for
this based it on the apparent higher activity levels
of prehistoric crocodyliformes, and the erroneous
assumption that you need to be an automatic endotherm
to be highly active.

Another argument is the high rate of evolution in the mitochondrial genome, but how closely such rates correlate to anything needs more investigation.