According to a 2020 study, ‘Recovering signals of ghost archaic introgression in African populations’ by Durvasula and Sankararaman, Sub-Saharan Africans (i.e. West Africans or ‘Black people’) derive up to 19% of their DNA from an unknown, extinct hominid species.
This mystery ‘ghost’ population is estimated to have diverged from the lineage that led to Homo Sapiens approximately 650,000 years ago, before the split between the Homo Sapiens and Homo Neanderthalis lineages. The study predicted that the admixture between Sub-Saharan Africans and the ghost population occurred around 43,000 years ago, long after Eurasians had left Africa. Europe was already populated by Cro-Magnon at that point.
Admixture of non-Homo Sapiens populations in modern human races therefore seems to be as follows:
|Neanderthal||Denisovan||African Ghost Population|
|Europeans||1-2%||None or trace amounts||None or trace amounts|
|East Asians||2-4%||Trace amounts||None or trace amounts|
|Southeast Asians||“Less than Europeans”||“Significant amounts” (Couldn’t find any good data)||None or trace amounts|
|Australo-Melanesians (Oceanians)||“More than Europeans but less than East Asians”||4-6%||Unknown|
|Sub-Saharan Africans||None or trace amounts||None or trace amounts||2-19%|
It’s worth noting that studies vary in their estimates on Neanderthal admixture levels. Some claim that East Asians have up to 8% Neanderthal admixture, and others claim that Oceanians have less Neanderthal admixture than Europeans.
Below: Data on Neanderthal and Denisovan admixture from a 2016 study in Current Biology by David Reich & co.
The African ghost population study was covered in Reuters, but I’m astounded that this finding hasn’t gotten more publicity. I guess it throws a huge spanner in the works of the race denialists’ “one race, the human race :^)” propaganda.