Paleo european groups

[Italicus]

Hey everyone, I don't know if this is the right place to post this, but here goes nothing. Apart from WHG and Basal Eurasian, what other paleo caucasian groups were there? I know there is also Sunghir, but anything else? Also, how did close did Sunghir and these other groups plot in comparison to WHG and Basal Eurasian? And what created the genetic differentiation between these caucasoid groups? Was it genetic drift, interbreeding with other hominids or other factors? Thanks for sticking with me on this question rant.