Ostrácodos (Crustacea) de la Formación Allen (Campaniano tardío-Maastrichtiano temprano, Cretácico Superior) en la localidad de Loma Puntuda, Salitral de Santa Rosa, Río Negro, Argentina

A.P. CARIGNANO; J.A. VARELA

REVISTA BRASILEIRA DE PALEONTOLOGIA

SOC BRASILEIRA PALEONTOLOGIA

Año: 2011 vol. 14 p. 169 - 178

1519-7530

A new microfossil association was found in the Allen Formation at Loma Puntuda (Neuquén Basin, Río Negro province, Argentina). It is represented by scarce charophyta and numerous carapaces and valves of ostracods from the Family Ilyocyprididae (such as Ilyocypris riograndensis and several species of Neuquenocypris)and Limnocytheridae (with the species Wolburgiopsis neocretacea and Vecticypris sp.). Molluscs, fragments of dinosaur eggshells and a plesiosaur remains had been registered previously in the same profile. This kind of association of non marine with a few marine fauna seems to indicate that the Allen Formation at Loma Puntuda was deposited in a shallow, fresh to oligohaline water body, near the coast.