INVESTIGADORES
PUJOS FranÇois Roger Francis
congresos y reuniones científicas
Título:
Evolutionary dynamics of Neogene vertebrate assemblages in Southern South America
Autor/es:
PREVOSTI, F.J.; ROMANO MUÑOZ, C. O.; FORASIEPI, A. M.; HEMMING, S.; BONINI, R.; CANDELA, A. M.; CERDEÑO, E.; MADOZZO JAÉN, M. C.; ORTIZ, P. E.; PUJOS, F.; RASIA, L.; SCHMIDT, G. I.; TAGLIORETTI, M.; MACPHEE, R. D. E.; PARDIÑAS, U. F. J.
Lugar:
Mendoza
Reunión:
Congreso; 34 JAPV; 2021
Resumen:
The vertebrate fossil record of the Pampean Region of Argentina occupies a major place in South American vertebrate paleontology. The abundance of fossils and paleontological sites has long been the main basis for constructing the chronostratigraphical/geochronological scale for the late Neogene Quaternary of South America and for understanding major patterns of vertebrate evolution, including the Great American Biotic Interchange. However, few independently-derived dates are available for constraining this record. In this contribution, we present new 40Ar/39Ar dates on escorias (likely the product of meteoric impacts) from Central Argentina and statistically based biochronological analyses that help to calibrate Late Miocene Pliocene Pampean faunal successions. These results give a better calibration of important first appearances of allochthonous taxa in South America, including one of the oldest records for procyonids (Late Miocene), cricPliocene). These results also constrain, to ca. 3 Ma, the last appearances of the autochthonous sparassodonts, as well as South American terror birds of large/middle body size. The South American faunal turnover during the late Neogene, including Late Pliocene extinctions, is interpreted as a consequence of knock-on effects from global climatic changes and the initiation of the icehouse climate regime.