PALYNOMORPH ASSEMBLAGE OF THE CHENQUE FORMATION, LATE OLIGOCENE?- MIOCENE FROM GOLFO SAN JORGE BASIN, PATAGONIA, ARGENTINA. PART 1: TERRESTRIAL ALGAE, TRILETE AND MONOLETE SPORES

Viviana Barrera

Abstract


Palynological analysis of the late Oligocene t-Miocene Chenque Formation, Golfo San Jorge basin, southeastern Argentina, has yielded a diverse spore-pollen assemblage. In this first part fresh water a1gae, monolete and trilete spore species are described. New combination of lschyosporites areapunctatis (Stuchlik) Barreda combo nov. is proposed and its revised description is given. The following species are reponed for the first time from Argentina: Cyathidites paleospora (Martin) Alley and Broadbridge, Foveotriletes palaequetrus Partridge, Matonisporites ornamentalis (Cookson) Partridge, Polypodiisporites inangahuensis (Couper) PotoniƩ and P radia tus Pocknall and Mildenhall.

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