There is alot of evidence that the original South American people were Australoids. There is also evidence that they mixed with the Asiatic migrants. This would explain deviation from the Mongoloid norm.
?!?
as you say, some "paleo" amerindians tribes of SouthAmerica (very small tribes without too much posterity) has (had?) shown some "low-evolved" physical features, the crania, face and skull, recalling some 'veddoid'-'australoid' primitive shapes (plus wavy hairs), some with a so called "judaic" or "armenoid" nose shape (I didn't found other terminology even if this one doesn't fit too well): yes, here we could see some crossing, because the 'veddas' and australian aborigenes don't show this kind of "falling tip" nose - but here, if crossing, we can imagine that the long nose shape is an inheritage from the other and more common south-amerindian tribes - but the weight of thses elements in the amerindian making is too light to explain current features among the Southern Amerindians
- I think you would have better leave all these simplistic mechanical adaptative theories for modern man: If you read what I post...
OR give them the place they have since some thousands of years ago: a little one -
answering your other post:
where do you see a link between the use of the 'brünn type' term and Nordicism??? it is as for "antisemitism", nowadays, some communities or some lobbies would have right to attract and monopolize scientific namings??? "semite" is an ethnic and linguistic term which has nothing to do with religious Jew (judaism) and by reaction I never use the word "antisemitism" but "anti-Jew" or "antijudaism", or with distinct meaning: "antisionism"
for "long faces" as you wrote, be precise then:
because as a whole common people understand: "long and narrow" (proportions more than absolute sizes) -
to be precise, 'cromagnon' (original, France for the most) has a broad, square (the 2 are not linked all thetime) AND SHORT!
the only massive (large) faces that was as square as 'cromagnon''s one because their great length was along with very great breadth of face, was the 'borreby' types - its origin is not too clear for now, even if people
believe it's a 'cromagnon' evolution with trend to brachycephally: as this type seams having participated into the 'est-baltic' type making, we can suppose it was frequent not only between Germany and Denmark, but too in baltic-south-Finnland regions at mesolithical time - but even in Eastern Europe regions (Russia), if I accept my
recent abstracts readings the first 'cromanoids' seen (dead, not at a pub terrasse) at neolithical time end was more upon the old model of
sub-dolichicephalic+euryprosope ("brachyfacial") -
So if we want understand one another let's say terms like "absolute ...", "relative length-breadth ratio" or somethings like that, giving sense...
for selection and climate, let's look at South Asia Indians: with the same colour skin or very close, we see completely different shapes for visages and skulls and bodies for people living at the same latitudes for a long enough time (25000 years, more???)
East Baltids are mostly Mongoloid. Baltids are mostly N1c1. A part of them even speak Finno-Ugric languages. R1a is the most common haplogroup in India the place of more than 1.5 billion humans.