Lapa do Santo — Early Holocene Brazil

Beneath the limestone shelters of Lapa do Santo, in the Lagoa Santa karst of central-eastern Brazil, archaeological strata preserve a human story unfolding during the Early Holocene. Radiocarbon and stratigraphic evidence place the sampled individuals between roughly 8250 and 7140 BCE. The site sits within a region that witnessed climatic shifts after the Last Glacial Maximum, and archaeological data indicate a continuity of hunter-gatherer occupation as environments stabilized.

Material remains from the site — stone tools, faunal bones, and hearths — suggest seasonal mobility tied to riverine and forest resources. Mortuary deposits at Lapa do Santo show diverse treatments; archaeological interpretations propose that the community practiced complex funerary behaviors, though the full range and meaning remain debated. Limited evidence suggests episodic aggregation of groups at rock shelters, perhaps connected by kin networks.

Genetically, the individuals sampled here belong to lineages that fit into broader Native American ancestry patterns, but with only seven genomes the picture is incomplete. Archaeology frames these people as local Early Holocene foragers whose lifeways emerged from long-term regional adaptations rather than sudden replacement. Ongoing excavation and additional ancient DNA will refine models of emergence and interaction in prehistoric Brazil.

Ancient DNA from seven individuals at Lapa do Santo provides a valuable, but preliminary, window into Early Holocene ancestry in eastern central Brazil. On the paternal side, three individuals carry Y-DNA haplogroup Q and one carries C. Haplogroup Q is widespread among Native American male lineages and is often interpreted as part of the founding paternal diversity of the Americas; haplogroup C also appears in some early American contexts and can reflect early dispersal branches. These signals align Lapa do Santo men with pan-American paternal lineages, though the small count warrants caution.

Mitochondrial DNA is represented by A2 (3 individuals), B2 (2), C (1), and D (1) — four haplogroups that are recognized among founding Native American maternal lineages. The diversity of mtDNA types within seven people suggests that multiple maternal lineages were present in this local population. Archaeogenetic patterns here are consistent with broader models in which early South American groups derive from the same deep ancestral source populations that peopled the continent, followed by regional diversification.

Because the dataset comprises only seven genomes, any population-level inference is tentative. Additional sampling from Lagoa Santa and neighboring regions is necessary to test hypotheses about migration routes, population structure, and kinship practices at burial events.