Based on what I know, most Somali males carry E-V32, which descends from the Iberomaurusians' E-M78; and most Somali males and females carry various sub-Saharan African haplogroups ("L" haplogroups) [
Link]. So, Somalis
appear to be a mixture of Iberomaurusian males who migrated into the Horn and mated with indigenous African females. However, when modeling Somalis using Vahaduo, the program will choose Natufian rather than Iberomaurusian in order to model part of Somalis' ancestry.
Collectively, this all implies that Somalis paternally descend from a mixture of Iberomaurusian males and Natufian females. More than likely, Natufians migrated into North Africa and the females were taken by the Iberomaurusian males; and their mixed male progeny then migrated into the Horn of Africa and mated with indigenous African females, thereby creating Somalis (and the other Afro-Eurasian Horners).
The Iberomaurusians and the Natufians shared ancestry; the former's E-M78 and the latter's E-Z830 both descend from E-M35:
- E-M215 (E1b1b) -> E-M35 -> E-L539 -> E-M78 (E1b1b1a1) [Link]
- E-M215 (E1b1b) -> E-M35 -> E-Z827 -> E-Z830 [Link]
However, the Iberomaurusian culture began ~25,000 years ago, while the Natufian culture began ~15,550 years ago. This implies that the Natufians were an offshoot of the Iberomaurusians. Additionally, E-M35 was the most downstream haplogroup in the paternal lineage of the Iberomaurusians and the Natufians that existed ~25,000 years ago, which implies that it was the paternal haplogroup of the first Iberomaurusians.
E-M35 originated in the Horn of Africa according to phylogenetic analyses, which implies that the Iberomaurusians were partly sub-Saharan African / indigenous Horn African. This is consistent with peer-reviewed scientific studies that have concluded that the Iberomaurusians were partly sub-Saharan African; for example,
Ancient West African Foragers In the Context of African Population History [
Link] models the Iberomaurusians of Taforalt as deriving 54% of their ancestry from the same source as SSAs such as Mota, the SSA component of the Agaw, and West Africans & Bantus [
Link].
This also explains why the Natufians have been determined to have been 6% Omotic (SSA) in the peer-reviewed scientific article,
Re-analysis of Whole Genome Sequence Data From 279 Ancient Eurasians Reveals Substantial Ancestral Heterogeneity (2018) [
Link], which states the following:
As already implied, the Iberomaurusians and the Natufians were partly Eurasian; the Iberomaurusians carried Eurasian Maternal Haplogroups M1b and U6a [
Link], and the Natufians carried Eurasian Maternal Haplogroups J2 and N1 [
Link, Table 2]. So, when their mixed progeny migrated into the Horn of Africa and mated with indigenous African females, they brought Eurasian DNA with them, which explains why Somalis have been determined to be 40% West Eurasian, according to peer-reviewed scientific studies, such as
Genome-wide analyses disclose the distinctive HLA architecture and the pharmacogenetic landscape of the Somali population [
Link].
Note that there were archaic humans known as
Aterians were who present in North Africa between 150 kya and 20 kya, which overlaps with the first 5000 years of the Iberomaurusian culture therein - and which overlaps with the the time period at which E-M35 formed (34,700 years ago,
according to YFull). Therefore, it's likely that the carriers of E-M35 who migrated to North Africa from the Horn of Africa mixed with the Aterians; the product of this intermixing would have been the
Ancestral North Africans (ANA). Therefore, the Iberomaurusians - being a mixture of ANA and Eurasians - likely had Aterian ancestry, which is consistent with their robust mandibles and overall robust anatomy - which are unlike those of anatomically modern humans.
Here's a quote from the peer-reviewed scientific article,
The relevance of late MSA [Middle Stone Age] mandibles on the emergence of modern morphology in Northern Africa (2022) [
Link].
Therefore, the Iberomaurusians were a mixture of anatomically modern humans from the Horn of Africa who carried E-M35, anatomically modern humans from Eurasia (who carried M1b and U6a), and very possibly Aterians.
As for the Natufians, their African ancestry (Aterian and SSA) was less than that of the Iberomaurusians, which can be explained by their presence in the Middle East and their subsequent intermixing with full-blooded Eurasians.
Therefore, Somalis probably have a bit of Aterian ancestry from via their Iberomaurusian and Natufian ancestry.
For a full breakdown of the origin of the Iberomaurusians and Natufians, read my article
here. Also,
here is my Human Ancestry Graph for Africans, part of which represents what I've explained.