Presença de Pecopteris e Asterotheca no Afloramento Morro do Papaléo, Município de Mariana Pimentel, Rio Grande do Sul (Formação Rio Bonito, Eopermiano da Bacia do Paraná)

Resumen

The site of Morro do Papaléo in Mariana Pimentel town is one of the best outcrops of Rio Grande do Sul State, southern Brazil, both in terms of diversity and abundance of fossils plants. The record of plants with frond-like foliage for Permian strata of the Rio Bonito Formation (Paraná Basin) in the Rio Grande do Sul State has been restricted to few specimens of the morphogenera Eupecopteris and Sphenopteris. Recent collectings in the uppermost part of Morro do Papaléo outcrop have revealed new kinds of pecopterids fronds, i.e. Asterotheca and Pecopteris, both inedita in the state. This work describe and classify these pecopterids fronds. The stratigraphic and paleoenvironmental implications resulting from record of these new taxa are briefly discussed.