Is Agrippa here?
I thought we could investigate the Amerindian racial types that are said to exist and show several photos (not just one or two) of the various types.
The main difference I know about is that between Northern Americans with higher statue, larger nose and more Caucasian look, and the ones south of it with more Mongoloid appereance, very short stature, oval or round face with strong prognathy and convex upper lip, and darker skin.
Here is a link that might help much
Now, who wanna start?