Voices of Tierra del Fuego

The Selknam (often called Ona in historical sources) occupied the northern interior of Isla Grande de Tierra del Fuego and the adjacent shores of the Strait of Magellan into the 19th century. Archaeological traces in this region—scattered camp sites, lithic scatters, and occasional shell-rich middens—are consistent with a long-term hunter–gatherer presence through the Late Holocene. Ethnohistoric records, collected by missionaries and explorers in the 19th century (e.g., around Estancia Harberton and along the Río Grande area), document a complex social landscape of seasonal movement, maritime resource use, and ritual life.

Limited archaeological excavation has been carried out specifically on Selknam habitations; much of the cultural picture derives from historic accounts, portable artifacts in museum collections, and comparative study with neighbouring Fuegian groups. This constrained archaeological visibility means that statements about the Selknam emergence and population dynamics remain provisional. Genetic data from three individuals dated to 1800–1900 CE provide a new, if small, window into ancestry and continuity in the region, complementing—but not replacing—archaeological and historical lines of evidence.

Three DNA samples from northern Tierra del Fuego, dated to roughly 1800–1900 CE, yield a concise but important genetic snapshot. Paternal lineage: one individual carried Y-haplogroup Q, a lineage widely associated with Native American paternal ancestry across the Americas. Maternal lineages: two individuals carried mtDNA haplogroup D and one carried C1b; both D and C1b are well-established founding Native American maternal lineages that appear in ancient and modern populations across South America.

These genetic signatures are consistent with a broader pattern of Indigenous American ancestry in southern South America and align with expectations from archaeological continuity in the region. However, the sample count is very small (n = 3). Limited samples mean that frequency estimates and claims of population structure or continuity must be considered preliminary. Ancient DNA from nearby groups (Yámana, Kawésqar) and additional Selknam samples would be needed to test hypotheses about regional gene flow, sex-biased admixture, and demographic change during the colonial era.

Where archaeology records social disruption and demographic collapse in the late 19th century, genetics can help test whether surviving lineages persisted locally or whether later admixture reshaped ancestry profiles. At present, the data point to Indigenous continuity but cannot resolve finer-scale population history.