The extinct prehistoric man was humanoid according toe Jeremiah's Hebrew word choice.
“My people are fools;
they do not know me.
They are senseless children;
they have no understanding.
They are skilled in doing evil;
they know not how to do good.”
I looked at the earth,
and it was formless and empty;
and at the heavens,
and their light was gone.
I looked at the mountains,
and they were quaking;
all the hills were swaying.
I looked, and there were no people; (generic term for man. Humanoid.)
every bird in the sky had flown away.
I looked, and the fruitful land was a desert;
all its towns lay in ruins
before the Lord, before his fierce anger.
Jeremiah 4:22-26
I learned from a Harvard professor of ancient languages (who taught at a Bible college) that the term Jeremiah used for "people/man"
was a generic term. Not one used to describe what we would know with certainty as a man would be today.
Jeremiah was describing a creature that was judged and destroyed by God, made to go extinct. = prehistoric man,