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| details | Artinskian | Kungurian | Picarelli,A.T. et al. Some considerations on the paleoecology and palynology of the Late Carboniferous of Santa Terezinha Brazil-Permian of the Parana Basin. (In: Late Paleozoic of South America, Project #211- UIGS) | 1987 | |
| details | Early Permian | Guerra-Sommer,M. et al. Original Biomass and coal deposition in southern Brazil, (Lower Permian, Parana Basin). | 1991 |