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> >In the seas there were plesiosaurs (long necked sea beasts),
> >ichthyosaurs (the reptilian equivalent of dolphins),
> But _were_ they reptiles? I suspect not, that body plan is built for
> a powerful swimmer. If they weren't out-and-out warm-blooded, I suspect
> they were at least as much so as modern tuna.
They are certainly not mammals :-)
Most still classify them as reptiles.
Also, if dinosaurs are wram-blooded (still controversial), and
retained in Reptilia, then there are other warm-blooded reptiles.
If I remember corectly, the Ichthyosaurs are now actually believed to
have been derived from lepidosauromorphs (the lineage leading to
modern lizards and snakes).
The peace of God be with you.