Abstract
The stratigraphical distribution of the Late Paleozoic marine fauna and megaflora is examined with respect to the available biostratigraphic framework for part of the Upper Paleozoic sequence of the Parana Basin, Brazil (Tubarao Group) possibly spanning the Upper Carboniferous-Lower Permian interval. Within this interval the megaflora succession shows a transition from assemblages with incidence of northern forms to others in which the Glossopterids are more frequent and finally predominate. The invertebrate megafauna (mollusks and brachiopods) succession shows a high frequency of cosmopolitan forms associated with Gondwanic forms in the early assemblages, followed later by more typical gondwanic faunal assemblages. The evidence at hand for the correlation of the studied sequence with the Caroniferous-Permian boundary is discussed.
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