This paper describes the Glossopteris species of a compact carbonaceous siltstone of the Upper Permian Serra Alta (or Terezina?) Formation (Paraná Basin), cropping out along the right margin of the Iguacu River, néar Fluviópolis, State of Parana, southern Brazil. The study of over 100 specimens related to the genus Glossopteris showed that they predominantly are of two possibly new species. However, because the small number of specimens with well preserved venation does not constitute an adequate basis for the creation of new species, the specimens are here referred to Glossopteris cf. G. occidentalis and Glossopteris cf. G. angustifolia
