New Cathartidae in the quaternary of the pampean region (Argentina). Comments on the fossil record of condors

AGNOLIN, F.; BRISSON EGLI, F.; SOIBELZON E.; RODRIGUEZ, S.; SOIBELZON L. H.; IACONA, F.; PIAZZA, D.

Contribuciones Científicas del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"

Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"

Año: 2018

1853-0400

The fossil record of condors in South America is relatively extensive. However, fossil specimens for the late Pleistocene of Argentina are scarce. Here, we report a new genus and species of a large sized cathartid of the condor lineage. The new taxon, Pampagyps imperator nov. gen. et sp. is based on a right tarsometatarsus from the ?Cantera Nicolás Vignogna III? fossiliferous locality, at Marcos Paz County, Buenos Aires Province, Argentina. The fossil was found in the middle levels of the outcrop assigned to the Lujanian Stage/Age (late Pleistocene). Its size is comparable to Geronogyps and Gymnogyps, being smaller than Vultur. Its combination of characters is unique, allowing recognizing a new taxon. An overview of fossil cathartids from Argentine lowlands indicates the existence of several condors that are not closely related to the extant Vultur gryphus. The presence of these large cathartids allows to review the fossil record of V. gryphus. The latter taxon has been recorded in the Pliocene of Buenos Aires Province (Argentina), and the Pleistocene of Estado Plurinacional de Bolivia and Brazil. A review of the Pliocene specimens from Buenos Aires Province suggests that they belong to an unnamed form not closely related to Vultur. Moreover, specimens from Bolivia are different from living V. gryphus, indicating that they belong to the extinct species ?Sarcoramphus? patruus. Brazilian records are fragmentary and found near to the locality where the fossil form Pleistovultur nevesi was described. Thus, we restrict the record of V. gryphus to the late Pleistocene of Andean and Patagonian regions.