PALEONTOLOGÍA Y GEOLOGÍA DEL PLEISTOCENO DE LA PROVINCIA DE CORRIENTES, ARGENTINA

FRANCIA A.; ZURITA, A.E.; ORFEO,O.; MIÑO BOILINI, A. R.; ERRA, G.; ZACARIAS G.; RODRÍGUEZ-BUALO, S.; ALCARAZ, M.A.; LUTZ, A.L.

Opera Lilloana

Fundación Miguel Lillo

Lugar: San Miguel de Tucumán; Año: 2019 vol. 52 p. 520 - 536

0078-5245

?Paleontology and chronology of the Pleistocene from the corrientes Province, argentina?. In the last decades the paleontological studies in the province of Corrientes have been increased. In this sense, Pleistocene vertebrates, particularly mammals, represent most of the records. Until now Pleistocene fossils come from the Toropí/Yupoí Formation, bounded to the late Pleistocene (ca. 52-36 ka), which includes not only vertebrates, but also phytoliths and fossil termites nests. One of the most fossiliferous localities corresponds to Arroyo Toropí. The diversity recorded for the Pleistocene of Corrientes includes the presence of 33 genera of vertebrates that include 3 reptiles sauropsida and 30 mammals. The evaluation of the relative representation of each trophic group and the estimation of the dominant body mass among the recognized mammals allowed to establish that: a) the representation of herbivorous taxons is dominant; a minor proportion of micromammals (surely related to tafonomic bias); b) the medium-sized mammals are dominant in the assemblage, followed by a similar proportion of small-sized mammals, and lastly by the mega-mammals. This paleofauna collected from sediments of Toropí/Yupoí Formation is characterized by a main influence of tropical-subtropical taxa, together with some taxa typical of the Lujanian of the Pampean region, adding also the presence of taxa that are currently absent in the Corrientes province (and even living in geographically distant areas). The evidence from the phytolithic analysis allows inferring the predominance of a warm-temperate climate with the development of open/semi-open environments dominated by grasses.