CISTOS DE DINOFLAGELADOS DO HOLOCENO DA PLANÍCIE COSTEIRA DE SANTA CATARINA (POÇO PSC-03): DESCRIÇÕES TAXONÔMICAS E IMPLICAÇÕES PALEOAMBIENTAIS

Authors

  • Wagner Guimarães da SILVA Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, IFRS, Campus Osório, Rua Santos Dumont, 2127, 95520-000 Osório, RS, Brasil.Programa de Pós-graduação em Geociências, Laboratório de Palinologia Marleni Marques Toigo, Instituto de Geociências, Universidade Federal do Rio Grande do Sul. Avenida Bento Gonçalves, 9500, CEP 91.540-000, Porto Alegre, RS, Brasil.
  • Paulo Alves de SOUZA Programa de Pós-graduação em Geociências, Laboratório de Palinologia Marleni Marques Toigo, Instituto de Geociências, Universidade Federal do Rio Grande do Sul. Avenida Bento Gonçalves, 9500, CEP 91.540-000, Porto Alegre, RS, Brasil.

DOI:

https://doi.org/10.5016/geociencias.v38i3.12563

Abstract

Detailed palynological studies on dinoflagellate cysts from Brazilian Quaternary deposits are relatively scarce. The palynological analysis performed from Holocene sediment of the core PSC-03 (27º53'22"S; 48º39'04'' W), drilled on the Coastal Plain of Santa Catarina, southern Brazil, revealed diverse and abundant palynological associations, including terrestrial (spores, pollen grains, fungi, freshwater algae) and marine (dinoflagellate cysts and foraminiferal linings) palynomorphs. The non-exposure of the samples to aggressive techniques, such as oxidation and acetolysis, during the laboratorial processing allowed the recovery of cysts from the family Protoperidiniaceae. Three genera (Brigantedinium, Lejeunecysta, Spiniferites) and four species (Brigantedinium simplex, Selenopemphix nephroides, S. quanta, Operculodinium centrocarpum) of dinoflagellate cysts are described and illustrated herein, constituting one of the most diverse fossil associations of the group for the Brazilian Holocene. The dinoflagellate cysts association suggest marginal marine environments, with susceptible to salinity variation and high concentration of nutrients in the surface waters.

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Published

2019-12-19

Issue

Vol. 38 No. 3 (2019)

Section

Artigos