Beyer indeed refers to it as supercardioid, but to be honest, I haven't really heard that distinction being made -
this website does, too, though, and offers diagrams. It's a bit strange, though, considering that
super and
hyper are essentially the same thing, except that one is Latin and the other Greek. There is no linguistic reason to assume that hyper is more than super, while hypo and hyper are in fact opposites.