Biostratigraphical implications of the bivalve fauna from Taciba formation (Butiá quarry), Itararé group, Paraná basin, lower permian - Simões, Marcello Guimarães; Neves, Jacqueline Peixoto; Anelli, Luiz Eduardo; Weinschutz, Luiz Carlos (Congresso Brasileiro de Geologia, 2012)