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Se presenta un analisis osteometrico uni y multivariado con los materiales fosiles -principalmente huesos cortos y falanges- de Vicugna sp. del yacimiento Cueva Lago Sofia 4 (13500 – 11000 AP), ubicado en la provincia de Ultima Esperanza (Region de Magallanes, Chile). Los resultados indican que los elementos analizados poseen un tamano compatible con los registrados para Vicugna vicugna, no superando en ningun caso a los especimenes conocidos para Vicugna gracilis del Pleistoceno de la region Pampeana. Esto confirma la informacion morfologica y de ADN antiguo que indicaba la presencia de Vicugna vicugna en la Patagonia meridional chilena. Se discuten los resultados en terminos taxonomicos, biogeograficos y paleoecologicos sugiriendo que la presencia de este taxon fuera de su rango actual de distribucion se debio a las condiciones ambientales compartidas entre la Puna y Patagonia austral durante la transicion Pleistoceno-Holoceno. La extincion de V. vicugna se habria debido al impacto de los cambios climaticos ocurridos al inicio del Holoceno producto de su dieta pastadora y etologia no migratoria y territorial, a lo que se habria sumado una caza por parte de depredadores humanos y no humanos. Palabras clave: genero Vicugna, osteometria, Pleistoceno, Patagonia Abstract This contribution presents the results of single and multi-variable osteometric analyses performed on a sample of short bones and phalanxes assigned to Vicugna sp. from Lago Sofia Cave 4 site (13500 – 11000 BP), Region de Magallanes, Chile. The elements analyzed show a similar size to the reference collections for Vicugna vicugna, and do not exceed the metrics for the pampean pleistocenic specimens of Vicugna gracilis. This confirms the morphological and ancient DNA data that indicated the presence of vicuna in southern Chilean Patagonia. The taxonomic, biogeographic and palaeoecologic discussion of these results, suggests that the presence of this species outside its current distribution range was due to shared environmental conditions between the Puna and Patagonia during the Pleistocene-Holocene transition. The extinction of this form is, most likely, due to the impact of climatic change during the begining of the Holocene over its pasturing diet and its territorial and non migratory habits. It is added to this, a hunting pressure by human and non-human predators. Keywords: Vicugna genus, osteometry, Pleistocene, Patagonia

Osteometría de Vicugna vicugna Molina, 1782 en el Pleistoceno final de Patagonia meridional chilena: Implicancias paleoecológicas y biogeográficas