V24

Origins and Evolution

mtDNA haplogroup V24 derives from the broader V2 lineage, itself a post-Last Glacial Maximum branch of haplogroup V associated with re-expansion from southwestern European refugia. Based on its phylogenetic position as a downstream clade of V2 and its modern and ancient occurrences, V24 most plausibly arose in western Europe during the later Neolithic to Chalcolithic (approximately 5 kya). Its emergence is consistent with the continued diversification of maternal lineages in populations of Iberia and adjacent regions after the initial postglacial expansions.

Because V24 is a low-frequency branch, its internal phylogeny is relatively shallow compared with older V subclades; the pattern is typical of lineages that originate in a geographically restricted area and persist at low levels without undergoing continent-wide replacement or major demographic expansions.

Subclades (if applicable)

At present V24 is represented by a small number of defined haplotypes rather than a deep hierarchical structure. Where additional downstream variants have been observed, they appear geographically localized and rare. Continued high-resolution mitogenome sequencing of modern and ancient samples may reveal further subclades, but current data suggest a limited number of closely related branches within V24.

Geographical Distribution

V24 shows a patchy, low-frequency distribution concentrated in western and southwestern Europe, with sporadic occurrences in nearby regions. Modern occurrences are most commonly reported from Iberian populations (Spain, Portugal) and some Mediterranean island populations (e.g., Sardinia and other western Mediterranean islands), with occasional detections in northwest Africa (Berber groups) and inisolated individuals from southern France and the western Caucasus region. The pattern is consistent with a western European origin and limited dispersal along coastal and Mediterranean routes rather than broad-scale inland expansion.

Ancient DNA evidence for V24 is currently sparse but includes at least one archaeological detection consistent with a later Neolithic / Chalcolithic context in western Europe. This sparse ancient record supports the interpretation of V24 as a localized, low-frequency lineage that persisted through the Chalcolithic and into later periods without becoming widespread.

Historical and Cultural Significance

Because V24 is rare and regionally restricted, it has not been a major marker of continent-wide demographic events. However, its timing and geographic focus make it relevant to the study of:

• Postglacial continuity and local maternal lineage persistence in Iberia and the western Mediterranean following the Last Glacial Maximum.
• Neolithic and Chalcolithic demographic processes in Iberia where local hunter-gatherer and early farmer communities interacted; V-derived lineages are often interpreted as marking long-term maternal continuity in southwestern Europe.
• Regional cultural phenomena such as Chalcolithic Iberian societies and later Bell Beaker-associated networks, where limited movement of maternal lineages may have carried V24 between coastal and island communities. The available data support only an associated or secondary role for V24 in these cultural horizons rather than as a primary demographic driver.

Conclusion

mtDNA V24 is best understood as a recently derived, low-frequency descendant of V2 that likely formed in western Europe during the later Neolithic / Chalcolithic. Its distribution—concentrated in Iberia and the western Mediterranean with sporadic occurrences elsewhere—reflects localized persistence and limited dispersal rather than large-scale expansion. Continued sequencing of both modern mitogenomes and ancient samples will be important to clarify its internal structure, antiquity, and precise archaeological associations.