The fungal spore Annella capitata Srivastava from the Jurassic (Late Toarcian-Late Bajocian) Cañadón Asfalto Formation of Patagonia, Argentina

OLIVERA D.E.; QUATTROCCHIO M.E.; ZAVATTIERI AM

PALYNOLOGY

AMER ASSOC STRATIGRAPHIC PALYNOLOGISTS FOUNDATION

Año: 2015 vol. 39 p. 258 - 269

0191-6122

The fungal spore Annella capitata Srivastava is recorded for the first time in Argentina, 11 within the continental Jurassic strata of the Cañadón Asfalto Formation, Cañadón 12 Asfalto Basin, Patagonia. It is identified on pollen grains belonging to the 13 Cheirolepideaceae, Araucariaceae and Podocarpaceae. This paper contrasts A. capitata 11 within the continental Jurassic strata of the Cañadón Asfalto Formation, Cañadón 12 Asfalto Basin, Patagonia. It is identified on pollen grains belonging to the 13 Cheirolepideaceae, Araucariaceae and Podocarpaceae. This paper contrasts A. capitata 11 within the continental Jurassic strata of the Cañadón Asfalto Formation, Cañadón 12 Asfalto Basin, Patagonia. It is identified on pollen grains belonging to the 13 Cheirolepideaceae, Araucariaceae and Podocarpaceae. This paper contrasts A. capitata 11 within the continental Jurassic strata of the Cañadón Asfalto Formation, Cañadón 12 Asfalto Basin, Patagonia. It is identified on pollen grains belonging to the 13 Cheirolepideaceae, Araucariaceae and Podocarpaceae. This paper contrasts A. capitata 11 within the continental Jurassic strata of the Cañadón Asfalto Formation, Cañadón 12 Asfalto Basin, Patagonia. It is identified on pollen grains belonging to the 13 Cheirolepideaceae, Araucariaceae and Podocarpaceae. This paper contrasts A. capitata Annella capitata Srivastava is recorded for the first time in Argentina, 11 within the continental Jurassic strata of the Cañadón Asfalto Formation, Cañadón 12 Asfalto Basin, Patagonia. It is identified on pollen grains belonging to the 13 Cheirolepideaceae, Araucariaceae and Podocarpaceae. This paper contrasts A. capitataA. capitata 14 with ubisch bodies (small sporopollenin spherules attached to the exine). A. capitata has 15 the same characteristics in the different pollen taxa, while the ubish bodies exhibit 16 taxon-dependent differences in ultrastructure, size and morphology. The presence of 17 hyphae and spore germlings reinforce a fungal origin of A. capitata. The degree and 18 type of deterioration associated with these fungal microfossils is presented. Based upon 19 the ecological requirements of the plant families recognized in the Cañadón Asfalto 20 palynoflora, it is inferred that A. capitata Srivastava thrived in low energy environments 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina. 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina. 18 type of deterioration associated with these fungal microfossils is presented. Based upon 19 the ecological requirements of the plant families recognized in the Cañadón Asfalto 20 palynoflora, it is inferred that A. capitata Srivastava thrived in low energy environments 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina. 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina. 15 the same characteristics in the different pollen taxa, while the ubish bodies exhibit 16 taxon-dependent differences in ultrastructure, size and morphology. The presence of 17 hyphae and spore germlings reinforce a fungal origin of A. capitata. The degree and 18 type of deterioration associated with these fungal microfossils is presented. Based upon 19 the ecological requirements of the plant families recognized in the Cañadón Asfalto 20 palynoflora, it is inferred that A. capitata Srivastava thrived in low energy environments 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina. 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina. 18 type of deterioration associated with these fungal microfossils is presented. Based upon 19 the ecological requirements of the plant families recognized in the Cañadón Asfalto 20 palynoflora, it is inferred that A. capitata Srivastava thrived in low energy environments 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina. 21 under warm-temperate and humid conditions. 22 Key words: Annella capitata, Fungi, Cañadón Asfalto Formation, Jurassic, Argentina.