Somalis have no connections to West Africans, so how can they be "blueprints" for them?
@Shimbiris, correct me if I'm wrong.
Somalis are North African (15%) + West Eurasian (25%) + Proto-Nilotic (50%) and Hunter gatherers (10%).
More like 5-10% Iron-Age Yemeni, 35% Neolithic North-African (Egyptian), 50% Proto-Nilotic and 5-10% Horn Hunter-Gatherer. Proto-Nilotic is related to West-African and there are elements of ancient East-African ancestry in WA but so far the time-divergences could be arguably as high as 20-30,000 years or more and there is some Iberomaurusian-like stuff in WAs but it's only like 5-10%. All in all the the genetic difference is arguably comparable to Europeans and East Asians and I would argue the physical differences on average too:
A Somali, a Senegalese, an Italian and a Chinese chap.