Aequitriradites Delcourt & Sprumont y Couperisporites Pocock, esporas de hepáticas, en el Cretácico Temprano de Patagonia, Argentina

• Autores: Sergio Archangelsky, Ana Archangelsky
• Localización: Revista del Museo Argentino de Ciencias Naturales, ISSN-e 1853-0400, ISSN 1514-5158, Vol. 7, Nº. 2, 2005, págs. 119-138
• Idioma: español
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• Resumen

  • Aequitriradites Delcourt & Sprumont and Couperisporites Pocock liverwort spores fromthe Early Cretaceous of Patagonia, Argentina. Spores belonging to liverworts are common components ofEarly Cretaceous assemblages in Southern Patagonia. Two genera, Aequitriradites and Couperisporites wereidentified from several localities and offshore wells in the Austral Basin. Three new species of Aequitriradites,viz. A. plicatus, A. longispinosus and A. superpinulosus are defined, together with the known species A. spinulosus,A. verrucosus and A. baculatus. Couperisporites is described and illustrated for the first time in Argentina withtwo species, viz. C. lilianae n.sp. and C. sp. Considerations on some morphological aspects related to ornamentationand exine structure are made as well as some stratigraphic implications on the distribution of these taxa. Thetaxonomic variety suggests favourable temperate/warm and humid environmental conditions for developmentof liverworts during the Early Cretaceous in Patagonia in agreement with data provided by other plant groupsidentified in the same assemblages.