Are they a part of our ancestral evolutionary line or a dead end?

Look, suppose what our readings show is the end of an evolutionary line rather than the beginning?

I sure as hell knew he wasn't from any evolutionary line on this planet!

But Man, somewhere along his evolutionary line, had abandoned the self-immunization mechanism.

The Zouvg race will now go properly forward on its correct evolutionary line.

But in the evolutionary line leading to man, when was the first large-scale development of the neocortex?

They did not all branch off the evolutionary line leading to coelurosaurs at the same time.

But it is too soon to say whether it might lie directly on our evolutionary line.

This pattern was established quite early in the evolutionary line that leads to our present day anthropoids, including, of course, man.

People leading independent lives, as we do today, might not be the end of the human evolutionary line.