ACRITARCAS y PRASINOFÍCEAS DEL LLANDOVERIANO TEMPRANO MEDIO DE LA FORMACIÓN LA CHILCA, QUEBRADA DE TALACASTO, PROVINCIA DE SAN JUAN, ARGENTINA
Abstract"Forty nine species of acritarchs and prasinophyceae belonging ro twenty eight genera, from the upper part of the Salto Macho Member of the La Chilca Formation, in the Talacasto Creek are described. Diexallophasis sanpetrensis (Cramer) varo echinata n. var., Ozotobrachion lunense n.sp. and Priscogalea varispinosa n.sp. are presented. The presence of Tylotopalla robustispinosa (Downie) Eisenack el al. and Oppilatala eoplanktonica (Eisenack) Dorning, which mark acritarch biozones in Great Britain, suggests an early to middle Llandoverian age for the assemblage. The association has a high cosmopolitan characteristic. Forms with a wide stratigraphic range appearing since Ordovician times have a connection with nOI1hAfrican and continental European gondwanic areas; the younger Silurian forms, show more affinities with those of perigondwanic areas from the United States and Great Britain."
How to Cite
Authors publishing in Ameghiniana have the option of making their article freely available online. Authors opting for the Open Access must pay a fee of $300 (US dollars) to cover article-processing costs and to ensure the article is made open access. Please contact the Production Team after the acceptance of your manuscript if you are interested in making your article Open Access. This option implies by default a license Creative Commons Attribution Non-Commercial-NoDerivs License (CC BY NC ND). If your funding institution requires a different licensing option please communicate this to the Production Team after the acceptance of your manusctipt.