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, Horacio Luis Felix, Césari, Silvia Nélida
Publicado: 1989
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00346667_v57_n3-4_p247_Sessarego
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
id paper:paper_00346667_v57_n3-4_p247_Sessarego
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spelling paper:paper_00346667_v57_n3-4_p247_Sessarego2023-06-08T15:00:48Z An early carboniferous flora from Argentina. Biostratigraphic implications Sessarego, Horacio Luis Felix Césari, Silvia Nélida 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. 1989 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00346667_v57_n3-4_p247_Sessarego 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.
author Sessarego, Horacio Luis Felix
Césari, Silvia Nélida
spellingShingle Sessarego, Horacio Luis Felix
Césari, Silvia Nélida
An early carboniferous flora from Argentina. Biostratigraphic implications
author_facet Sessarego, Horacio Luis Felix
Césari, Silvia Nélida
author_sort Sessarego, Horacio Luis Felix
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
publishDate 1989
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00346667_v57_n3-4_p247_Sessarego
http://hdl.handle.net/20.500.12110/paper_00346667_v57_n3-4_p247_Sessarego
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