UN NUEVO RESTO DEL CENOLESTIDO PLIOLESTES REIG, 1955 (MAMMALIA, MARSUPIALIA) DEL PLIOCENO DE LA PROVINCIA DE BUENOS AIRES (ARGENTINA)

Francisco J. Goin, Ulyses F. J. Pardiñas, Maximiliano J. Lezcano

Abstract


We describe a new remain assignable to Pliolestes cf . P. tripotamicus Reig, 1955 (Caenolestoidea, Caenolesridae, Pichipilinae) exhumated from Pliocene levels at the Irene "Formation", in Southern Buenos Aires Province, Argentina. Although its general morphology closely resembles that of P. tripotamicus, its size and other minor differences prevent us to assigne it to the only known species of this genus. A brief comment on Pichipilinae relationships is made. On the basis of its faunal content, the lrene "Formation" could prove to be intermediate in age between the Montehermosan (early-middle Pliocene) and Chapadmalalan (late Pliocene) South American Land-Mammal ages. Future research may positively test an hypothesis linking the Irene fauna with that of the "Miembro de las Limolitas claras" of the Monte Hermoso Fonnation (Montehermosan Land-Mammal age).

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