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Peat palynology from the Banhado Amarelo bog, São Francisco de Paula, Rio Grande do Sul, Brasil: fungi and cryptogams

The vegetation analysis based on sediment palynology needs correct taxonomy of the palynomorphs. The aim of the research is to present reference material to this analysis in Quaternary sediments from the Brazilian Southern Plateau, using palynomorphs of fungi and cryptogams preserved in the peat from Banhado Amarelo bog (29º19'S and 50º08'W), São Francisco de Paula, RS. The profile (390 cm) was collected with a Hiller Sampler. The chemical processing of the 30 extracted samples followed standard methodology, using HCl, HF, KOH and acetolysis. Light microscopy was used in the analysis. A radiocarbon dating at the base of the profile (26.080 ± 320 yrs BP, Beta 245611) indicated the time interval. Palynomorphs from nine fungi, five algae, three bryophytes and 13 pteridophytes are presented. Descriptions, illustrations and, whenever possible, ecological data from the original organisms are included. The high number of taxa shows the potential of these palynomorphs to offers subsidies to the palaeoenvironment research of the last millennia from Southern Brazilian Plateau.

palynomorphs; taxonomy; Quaternary; Southern Brazil


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