R1b1c 
The R1b1c in Sardinia is M18 a clade that is absent in all sub-Saharan and other African populations; It was only detected in Lebanon, Sardinia and Corsica; Its ancestral clade is V88 and V88 clades are most common in sub-saharn Africa but R1b-V88 itself is not sub-saharan due to its ancestor P25 (ancestor of both V88 and M269) is not sub-Saharan African but from the Eastern Eurasia where in turn its ultimate ancestor M207 (R1b/R1a) derives from; Thus before R1b (P25/V88) entered sub-Sahran Africa (from Eurasia/NearEast) it must have split into subclade M18 and moved along the Mediterranean as for the distribution of V88 clades in sub-Sahran Africa {Cruciani et al 2010}: "In summary, our data indicate a significant male contribution from northern Africa (and ultimately Asia) to the gene pool of the central Sahel. The trans-Saharan population movements resulting in this genetic pattern would seem to mirror the spread of the proto-Chadic languages, and most likely took place during the early mid Holocene, a period when giant paleolakes may have provided a corridor for human migrations across what is now the Sahara desert."Cruciani et al 2010: http://www.nature.com/ejhg/journal/v18/n7/full/ejhg2009231a.html note the complete absence of M18 in Africa (Table1.)