Mamíferos de la Formación El Palmar (Pleistoceno tardío) de la provincia de Entre Ríos, Argentina

FERRERO, BRENDA SOLEDAD; BRANDONI, DIEGO; NORIEGA, JORGE IGNACIO; CARLINI, ALFREDO A.

Revista del Museo Argentino de Ciencias naturales

Museo Argentino de Ciencias Naturales

Lugar: Buenos Aires; Año: 2007 vol. 9 p. 109 - 117

1514-5158

The diversity of mammals of the El Boyero locality (31º25’S, 58º 02’O), situated in the proximities of Concordia city, Entre Ríos Province is analysed in this contribution. The fossil remains come from the El Palmar Formation, which is the highest terrace of the western margin of the Uruguay river, in the mentioned province, and whose age is assigned to the late Pleistocene. Eight taxa have been identified at specific level: Megatherium americanum (Megatheriidae Megatheriinae), Mylodon darwini (Mylodontidae Mylodontinae), Macrauchenia patachonica (Litopterna Macraucheniidae), Toxodon cf. platensis (Notoungulata Toxodontidae), Tapirus cf. terrestris (Perissodactyla Tapiridae), Equus (Amerhippus) cf. neogeus (Perissodactyla Equidae), Morenelaphus cf. lujanensis, Antifer sp. (Artiodactyla Cervidae) and Stegomastodon platensis (Proboscidea Gomphotheriidae). The paleontological record of mammals from the El Palmar Formation was limited to Stegomastodon platensis; therefore, the identification of the new taxa increases substantially the biodiversity known in the El Palmar Formation. Also, the first record of Morenelaphus cf. lujanensis is announced for the Entre Ríos Province. The presence of Equus (A.) cf. neogeus would postulate a Lujanian age (late Pleistoceneearly Holocene) for the described association.