INVESTIGADORES
GELFO javier Nicolas
congresos y reuniones científicas
Título:
The youngest non-lepidosirenid lungfish of South America (Dipnoi, latest Paleocene-earliest Eocene, Argentina).
Autor/es:
GOUIRIC-CAVALLI, S., ; CIONE A.; GELFO J. N.; GOIN F. J.
Lugar:
San Luis
Reunión:
Jornada; XXV Jornadas Argentinas De Paleontología De Vertebrados San Luis; 2010
Institución organizadora:
Universidad nacional de San Luis
Resumen:
We describe the first ceratodont tooth plate from the Las Flores Formation (latest Paleocene-earliest Eocene), ChubutProvince, Argentina. The material comprises a small fragmentary upper tooth plate with attached bone. This is the youngestceratodont known from South America. In Africa, ceratodonts disappeared during the Eocene. After that they are only knownfrom Australia, until their extinction during the Pleistocene. The extinction of non-lepidosirenid lungfishes in Africa andSouth America could have been related to environmental changes. Remarkably, in South America several other continentaltaxa became extinct during the Paleocene and Eocene: many actinopterygian families (i.e., Polypteridae, Phareodontidae, andHeterodininae) and several mammalian lineages; dryolestoids, gondwanatheres and ornithorhynchids among non-therianmammals. Among therian mammals, only the order Xenungulata was constrained to the late Paleocene and early Eocene.The material from Las Flores represents the southernmost lungfish known in the world after the K-P boundary.
