FOSSILIFEROUS PLANKTONIC RECORD ASSOCIATED WITH CHERT CONCRETIONS IN OUTCROPS OF ASSISTENCIA AND TERESINA FORMATIONS - PARANA BASIN.

The main objective of this research is the study of the Permian fossil record of planktonic life found in chert concretions, associated with layers of carbonate sedimentary rocks outcropping in the municipalities of Santa Rosa do Viterbo/SP and Conchas/SP, belonging to Assistencia and Teresina Formations (Passa Dois Group, Parana Basin). A systematic comparison of the microfossils will be based on morphological and anatomical characters. The good preservation of specimens allow the classification and understanding of the way of life, habitats and taphonomy of the deposits in which they are found. It is worth mentioning that the microfossils present in the Passa Dois Group are still little studied and even more those associated with chert concretions and carbonate rocks of the Permian Parana Basin.