I have noticed that the Berid type tends to be centered around regions in Europe where a slight North African genetic component is present; Iberia, Sicily, far southern Italy, Malta.
The Basque Country, Greece, France, and the Balkans, where no North African component exists in the genes, have almost no Berid types in true form.
Might there be a connection? Could the Berid type represent Neolithic or pre-Neolithic influence from North Africa? Following the places where it is found, and the presence of NW African genes there in small amount, I suspect Berids are the phenotypical remainder of an old North African population.