Systematics of Lutetian Larger Foraminifera and magneto-biostratigraphy from the South Pyrenean Basin (Sierras Exteriores, Spain)

An extense systematic description of the Eocene larger foraminiferal faunas recorded in South Pyrenean Basin (Sierras Exteriores) is presented herein. The large dataset provided this work includes both Nummulites and Alveolina species, along with a variety other porcellaneous hyaline taxa lesser biostratigraphic relevance, are represented. foraminifera described correspond mainly to Lutetian (SBZ13 SBZ16 biozones) interval, but late Ypresian (SBZ11, Cuisian) Bartonian (SBZ17) shallow benthic zones have also been identified.As one most relevant results analysis, new Idalina osquetaensis, described. revision middle alveolines led reassessment A. fusiformis finding two precursor forms, as affinis their corresponding aff. fragilis elongata. forms elongata fill gap alveolinid biostratigraphy. Despite not being exclusive SBZ16, these provide realiable information where present. This realibility lies on correlation biomarkers same sections calibration global time scale through magnetostratigraphy. In fact, magnetostratigraphic all provided, an update SBZ current Geologic Time Scale (Gradstein et al., 2012).