RT Journal Article T1 The Paleo-Indian Entry into South America According to Mitogenomes A1 Brandini, Stefania A1 Bergamaschi, Paola A1 Cerna, Marco Fernando A1 Gandini, Francesca A1 Bastaroli, Francesca A1 Bertolini, Emilie A1 Cereda, Cristina A1 Ferretti, Luca A1 Gómez Carballa, Alberto A1 Battaglia, Vicenza A1 Salas Ellacuriaga, Antonio A1 Semino, Ornella A1 Achilli, Alessandro A1 Olivieri, Anna A1 Torroni, Antonio K1 Native Americans K1 Mitochondrial DNA K1 Mitochondrial genomes K1 Haplogroups K1 First peopling of South America K1 Ecuador K1 Peru AB Recent and compelling archaeological evidence attests to human presence ∼14.5 ka at multiple sites in South America and a very early exploitation of extreme high-altitude Andean environments. Considering that, according to genetic evidence, human entry into North America from Beringia most likely occurred ∼16 ka, these archeological findings would imply an extremely rapid spread along the double continent. To shed light on this issue from a genetic perspective, we first completely sequenced 217 novel modern mitogenomes of Native American ancestry from the northwestern area of South America (Ecuador and Peru); we then evaluated them phylogenetically together with other available mitogenomes (430 samples, both modern and ancient) from the same geographic area and, finally, with all closely related mitogenomes from the entire double continent. We detected a large number (N = 48) of novel subhaplogroups, often branching into further subclades, belonging to two classes: those that arose in South America early after its peopling and those that instead originated in North or Central America and reached South America with the first settlers. Coalescence age estimates for these subhaplogroups provide time boundaries indicating that early Paleo-Indians probably moved from North America to the area corresponding to modern Ecuador and Peru over the short time frame of ∼1.5 ka comprised between 16.0 and 14.6 ka PB Oxford University Press SN 0737-4038 YR 2018 FD 2018 LK http://hdl.handle.net/10347/24291 UL http://hdl.handle.net/10347/24291 LA eng NO Molecular Biology and Evolution, Volume 35, Issue 2, February 2018, Pages 299–311, https://doi.org/10.1093/molbev/msx267 NO This study received support from the University of Pavia strategic theme “Towards a governance model for international migration: An interdisciplinary and diachronic perspective” (MIGRAT-IN-G) (to A.O., A.A., O.S., and A.T.), and the Italian Ministry of Education, University and Research: Progetti Futuro in Ricerca 2012 (RBFR126B8I) (to A.O. and A.A.) and Progetti Ricerca Interesse Nazionale 2012 (to A.A, O.S., and A.T.) DS Minerva RD 25 abr 2026