Quistes de dinoflagelados no marinos del Holoceno de la provincia de Buenos Aires, Argentina: relación con especies actuales de Peridinium

BOREL, C.M., BOLTOVSKOY, A., GUERSTEIN, G.R. Y STUTZ S.

Revista del Museo Argentino de Ciencias Naturales

Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"

Lugar: Buenos Aires; Año: 2006 vol. 8 p. 119 - 125

1514-5158

Non marine dinoflagellate cysts from the Holocene of Buenos Aires province, Argentina: relationship with recent species of Peridinium. palynological zones with important frequencies of peridinioid organic walled dinoflagellate cysts were reported for freshwater to brackish, middle to late Holocene sequences from south east of Buenos Aires province, Argentina. The recovered dinocysts have a thin wall, frequentely folded; with granulate periphragm and smooth endophragm. The tabulation and the archeopyle suture are difficult to discern. These non-marine palynomorphs are described and compared with modern cysts recovered from a bloom of Peridinium willei Hitfeld-Kaas in a pool of Casali Quarry, Los Talas, Buenos Aires province, and with recent cysts produced in San Roque reservoir, Cordoba province, by Peridinium gatunense Nygaard. The comparison points out the scarcity of morphological distinctive features characteristic of the theca stage, though shows general similarities between the present and fossil cysts.