Quoting David Peters <davidrpeters@earthlink.net>:
I haven't found ANY molecular studies in the Reptilia that match morphological studies. In fact molecular studies seem to bring up some pretty odd pairings among reptiles.
Which is valid? Or am I asking for a subjective vote?
We don't know yet (and may never). Most probably, the answer is "neither".
Nick Pharris Department of Linguistics University of Michigan