MATERIAL FUNGICO y GRANOS DE POLEN DE ANGIOSPERMAS DE LA FORMACION RIO TURBIO (EOCENO), PROVINCIA DE SANTA CRUZ, REPUBLICA ARGENTINA

Abstract

"Microplankton, spores of Pteridophyta, and pollen graíns of Gymnosperms and Fagaceae have been already studied from this Formation. The purpose of this paper is to begin with the study of fungal remains and Angiosperm pollen (other than Nothofagidites Potonié). Eigtheen samples in the about 400 m deep w eH D-15 were analízed. The fossils are described, measured and discussed. The most important taxa were: Plochmopeltinites masonii Cookson emend. Selkirk, germlings of Microthyriaceae, Pluricellaesporites psilatus Clarke, Lacrimasporonites sp, and a new species of Tulosporonites, among the Fungi, and Concopites leptos Fartridge, Gothanipollis bassensis Stover, Triatriopollenites latejlexus Archangelsky, Tricolpites gillii Cookson, Tricolpites reticulatus Cookson, Striatricolporites gamerroi Archangelsky and Ilexpollenites cliidenensis McIntyre among the Angiosperms. Problems of nomenclature and delimitation were found in Tricolpites Cookson ex Couper and Pluricellaesporites Van der Hammen emend. Sheffy and Drlcher. The taxa studied are varied though never dominant. Most species could be compared with a living genus or Iamily. The age indicated by the fossils is Eocene."