An early carboniferous flora from Argentina. Biostratigraphic implications

A Lower Carboniferous flora from the Del Ratón Formation, exposed near Calingasta, San Juan province of Argentina, is described and illustrated and its biostratigraphic significance is evaluated. The megafossils include Lepidodendropsis eximius (Frenguelli) Sessarego et Césari, Archaeosigillaria con...

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Autores principales: Sessarego, H.L., Césari, S.N.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00346667_v57_n3-4_p247_Sessarego
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00346667_v57_n3-4_p247_Sessarego2023-10-03T14:46:03Z An early carboniferous flora from Argentina. Biostratigraphic implications Sessarego, H.L. Césari, S.N. A Lower Carboniferous flora from the Del Ratón Formation, exposed near Calingasta, San Juan province of Argentina, is described and illustrated and its biostratigraphic significance is evaluated. The megafossils include Lepidodendropsis eximius (Frenguelli) Sessarego et Césari, Archaeosigillaria conferta (Frenguelli) Menéndez, Diplothmema bodenbenderi (Kurtz) Césari, Eusphenopteris devonica (Frenguelli) nov. comb., "Hyenia" argentina, "Rhodea" sp. and Telangiopsis sp. The associated microflora, described for the first time, includes Verrucosisporites congestus Playford, Anapiculatisporites amplus Playford et Powis, Dictyotriletes submarginatus Playford, cf. Densosporites spinosus Dybová et Jachowicz, Retusotriletes avonensis Playford, Dibolisporites cf. D. distinctus (Clayton) Playford and Grandispora debilis Playford. The megafossil species are referable to the Archaeosigillaria Lepidodendropsis biozone, which combines the Archaeosigillaria Zone and Lepidodendropsis Flora of Archangelsky and Azcuy (1985) and Archangelsky et al. (1986). The plant megafossils and associated microflora suggest a Visean age for this biozone. The presence of an associated marine fauna in the stratigraphically equivalent Malimán Formation, having Protocanites scalabrinii Antelo, corroborates a Lower Carboniferous age for our biozone. By comparison with others in the world this is the oldest Carboniferous taphoflora in Argentina and probably in the whole of South America. The evolutionary significance of the Lepidodendrossis flora is analysed. © 1989. Fil:Sessarego, H.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Césari, S.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00346667_v57_n3-4_p247_Sessarego
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A Lower Carboniferous flora from the Del Ratón Formation, exposed near Calingasta, San Juan province of Argentina, is described and illustrated and its biostratigraphic significance is evaluated. The megafossils include Lepidodendropsis eximius (Frenguelli) Sessarego et Césari, Archaeosigillaria conferta (Frenguelli) Menéndez, Diplothmema bodenbenderi (Kurtz) Césari, Eusphenopteris devonica (Frenguelli) nov. comb., "Hyenia" argentina, "Rhodea" sp. and Telangiopsis sp. The associated microflora, described for the first time, includes Verrucosisporites congestus Playford, Anapiculatisporites amplus Playford et Powis, Dictyotriletes submarginatus Playford, cf. Densosporites spinosus Dybová et Jachowicz, Retusotriletes avonensis Playford, Dibolisporites cf. D. distinctus (Clayton) Playford and Grandispora debilis Playford. The megafossil species are referable to the Archaeosigillaria Lepidodendropsis biozone, which combines the Archaeosigillaria Zone and Lepidodendropsis Flora of Archangelsky and Azcuy (1985) and Archangelsky et al. (1986). The plant megafossils and associated microflora suggest a Visean age for this biozone. The presence of an associated marine fauna in the stratigraphically equivalent Malimán Formation, having Protocanites scalabrinii Antelo, corroborates a Lower Carboniferous age for our biozone. By comparison with others in the world this is the oldest Carboniferous taphoflora in Argentina and probably in the whole of South America. The evolutionary significance of the Lepidodendrossis flora is analysed. © 1989.
format JOUR
author Sessarego, H.L.
Césari, S.N.
spellingShingle Sessarego, H.L.
Césari, S.N.
An early carboniferous flora from Argentina. Biostratigraphic implications
author_facet Sessarego, H.L.
Césari, S.N.
author_sort Sessarego, H.L.
title An early carboniferous flora from Argentina. Biostratigraphic implications
title_short An early carboniferous flora from Argentina. Biostratigraphic implications
title_full An early carboniferous flora from Argentina. Biostratigraphic implications
title_fullStr An early carboniferous flora from Argentina. Biostratigraphic implications
title_full_unstemmed An early carboniferous flora from Argentina. Biostratigraphic implications
title_sort early carboniferous flora from argentina. biostratigraphic implications
url http://hdl.handle.net/20.500.12110/paper_00346667_v57_n3-4_p247_Sessarego
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AT sessaregohl earlycarboniferousflorafromargentinabiostratigraphicimplications
AT cesarisn earlycarboniferousflorafromargentinabiostratigraphicimplications
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