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Re: Bat origins
>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).
Things start getting dicey when we try to draw the line between therapsids=
and mammals. We have so many good transitional forms, that the line has to=
be placed in an arbitrary way. For now, it has been placed somewhere=
between the two (I'm not sure where).