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Rob <Robert.J.Meyerson@uwrf.edu> writes:
>>synapsids, which I gather aren't even called reptiles any more though they
>>are still referred to as reptiles in many books.
>Actually, synapsid is still a valid taxon within reptilia.  The two=
> important ones, the pelecosaurs and therapsids, are considered true=
> reptiles (warm-bloodedness appearing in the advanced therapsids)...

Therapsids are generally considered to be non-reptiles by the same folks who
consider dinosaurs to be non-reptiles (e.g. Bob Bakker, Adrian Desmond, and
yours truly :) ).

                             -- Dave