Distribución de los Ammonites del Cretácico sudpirenaico.

Abstract

Contrary to what we can infer from the existing bibliography, the amrnonites have proved to be an important component of the South Pyrenean Cretaceous fauna. During the preparation of my dissertation, 1 have been able to gather more than 1,500 speciment of ammonites from the Segre to the Noguera Ribagorzana, among which 1 have identified 131 species ranging from the Lower Aptian to the Lower Maastrichtian. Here 1 present the distribution of these species withih the known ammonites zones. Departament de Paleontología, Universitat Autónoma de Barcelona, Be * llaterra. 1035