Dragon man skull has been confirmed as belonging to the Denisovan lineage through genetic study.

What does this imply about the three major races of Homo sapiens?

It appears that Asian populations are the result of admixture between Neanderthals, denisovans and early humans. Caucasians/whites are the result of mixing between just Neanderthal and early humans, and blacks are just Homo sapiens with very little Neanderthal admixture from back-migrations.

Does this not suggest there really are differences significant enough to separate the three groups into distinct sub-species? Does this explain the differences in intelligence and behaviour amongst the different human races?

There are 3 species of humans-
Incel, Normie and Chad

Those robust skulls were probably the chads of those times.

>>509152389 (OP)
Something else also distinctly graciled the high eurasian races away from the aboriginal and other archaic hominids still living today predominantly in Africa, southern India, southeast asia, and Australia.

I suspect for the more european of the eurasian high races, the evidence would be impossible to find as their antediluvian archaic remains would be in the mid Atlantic and for the high east asians elsewhere. Lost under water not only due to ocean level changes from the flood/melt, but also continental isostasy from all the weight of that water shifting from the poles to the ocean basins.

>>509153903
What do you think of the proposed homo juluensis? 2 skulls found in China that are close in proximity and in morphology. These skulls are simply giant, with a cranial capacity of around 1700-1800 cc