INVESTIGADORES
BENEDETTO Juan Luis Arnaldo
artículos
Título:
The earliest estuarine bivalve assemblage, Lower Ordovician (Arenig) of northwestern Argentina
Autor/es:
SÁNCHEZ, T.M. Y BENEDETTO, J.L.40
Revista:
GEOBIOS
Editorial:
Elsevier
Referencias:
Lugar: Lyon; Año: 2007 vol. 40 p. 223 - 233
ISSN:
0016-6995
Resumen:
ABSTRACT--The oldest known estuarine bivalve assemblage is described from the Early Ordovician (late Arenigian-early Llanvirnian) Alto del Cóndor Formation of northwestern Argentina. This unit displays most of the diagnostic sedimentary attributes of estuarine environments. Biotic components include low-diversity trace fossils and a peculiar bivalve fauna consisting of the new genera Konduria, Pseudoredonia, and Pucamya, and the new species Redonia condorensis. This constitutes the earliest known occurrence of bivalves in brackish waters, suggesting that the capability of this clade to colonize estuarine environments developed early in their radiation.
