I have read somewhere that Southeast Asian and North Eurasian split around 50,000 years ago while Caucasian and Northeast Asian split around 30,000 years ago. By genetic, would this mean that Mongoloid phenotype is just a convergent evolution of both Northeast Asian and some Southeast Asian (S. Chinese & Vietnamese)?
I doubt if the figure for Southeast Asian and North Eurasian splitting at 50,000 YBP is correct. The Asian race began in northern Vietnam 51,000 YBP. But who did they split off from? Was this the date of the SE Asian-North Eurasian split? I do not think anyone knows what those people looked like but skulls from 25,000 YBP in Thailand look like Aborigines and skulls from Vietnam 22,000 YBP look Melanesian. Also skulls from India 25,000 YBP look like Aborigines.
And about these elusive North Eurasian people, lost in the mists of time – could the very mysterious Caucasoid-like Chukchi and Ainu be all that remains?
Caucasian and Northeast Asian could not have split off that late. Cavalli-Sforza says that Caucasian split off in part from Northeast Asian 42,000 YBP. We do not know exactly what those people looked like, but a skull from 7,000 years after the creation of the Caucasian race from southern Russia has been characterized as Australoid.
So from 22,000-35,000 YBP in a belt from Caucasus – India – Thailand – Vietnam, all humans were apparently Australoids.
It is starting to look like Australoid types were the basic human type outside of Africa for a very long time, possibly until just recently.