New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks

Autores
López, Fernando Enrique; Conde, Osvaldo Agustin; Braeckman, Alejandro R.; Segura, Diego G.; Drovandi, Juan Martín; Bueno, Andrea J.; Abarca, Ulises
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Graptolites represent one of the most important index fossils for the lower to middle Paleozoic biostratigraphy worldwide. Compared to other regions, graptolite faunas exhibited a marked decrease in diversity in Argentina during the Silurian, what resulted in reduced and low-varied registers and denied biostratigraphic works in its territory. This study introduces new Silurian graptolite faunas from the Los Espejos Formation, Poblete Norte section, Central Precordillera of Argentina. A total of thirteen graptolitic levels were identified, containing Bohemograptus bohemicus, Lobograptus sp., Saetograptus argentinus argentinus, Saetograptus cf. S. varians, Uncinatograptus uncinatus notouncinatus, Uncinatograptus elsae sp. nov., and Uncinatograptus lisandroi sp. nov. The occurrence of Uncinatograptus spp. in association with B. bohemicus could indicate the presence of the lower Gorstian Neodiversograptus nilssoni Biozone. A few meters above, the finding of S. a. argentinus in association with S. cf. S. varians, U. u. notouncinatus, and Lobograptus sp. suggest the presence of the lower Gorstian Lobograptus progenitor Biozone. The upper graptolitic beds yield specimens of S. a. argentinus and B. bohemicus, suggesting late Gorstian to early Ludfordian ages. These new graptolite faunas allow to correlate more precisely with local (Precordillera and Famatina), regional (North Western Argentina and Bolivia) and global equivalent sections. This discovery introduces new graptolite faunas, first-time recorded in South America, proposes for the first time a graptolite biostratigraphy for the Ludlow of Precordillera, and complements so far insufficient knowledge on Ludlovian graptolitic faunas of the continent in a critical time in the history of this fossil group.
Fil: López, Fernando Enrique. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina
Fil: Conde, Osvaldo Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Braeckman, Alejandro R.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
Fil: Segura, Diego G.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
Fil: Drovandi, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Bueno, Andrea J.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
Fil: Abarca, Ulises. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
Materia
Graptolithina
Biostratigraphy
Gorstian Stage
Ludlow Series
Los Espejos Formation
Precordillera
Argentina
South America
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/266512
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarksLópez, Fernando EnriqueConde, Osvaldo AgustinBraeckman, Alejandro R.Segura, Diego G.Drovandi, Juan MartínBueno, Andrea J.Abarca, UlisesGraptolithinaBiostratigraphyGorstian StageLudlow SeriesLos Espejos FormationPrecordilleraArgentinaSouth Americahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Graptolites represent one of the most important index fossils for the lower to middle Paleozoic biostratigraphy worldwide. Compared to other regions, graptolite faunas exhibited a marked decrease in diversity in Argentina during the Silurian, what resulted in reduced and low-varied registers and denied biostratigraphic works in its territory. This study introduces new Silurian graptolite faunas from the Los Espejos Formation, Poblete Norte section, Central Precordillera of Argentina. A total of thirteen graptolitic levels were identified, containing Bohemograptus bohemicus, Lobograptus sp., Saetograptus argentinus argentinus, Saetograptus cf. S. varians, Uncinatograptus uncinatus notouncinatus, Uncinatograptus elsae sp. nov., and Uncinatograptus lisandroi sp. nov. The occurrence of Uncinatograptus spp. in association with B. bohemicus could indicate the presence of the lower Gorstian Neodiversograptus nilssoni Biozone. A few meters above, the finding of S. a. argentinus in association with S. cf. S. varians, U. u. notouncinatus, and Lobograptus sp. suggest the presence of the lower Gorstian Lobograptus progenitor Biozone. The upper graptolitic beds yield specimens of S. a. argentinus and B. bohemicus, suggesting late Gorstian to early Ludfordian ages. These new graptolite faunas allow to correlate more precisely with local (Precordillera and Famatina), regional (North Western Argentina and Bolivia) and global equivalent sections. This discovery introduces new graptolite faunas, first-time recorded in South America, proposes for the first time a graptolite biostratigraphy for the Ludlow of Precordillera, and complements so far insufficient knowledge on Ludlovian graptolitic faunas of the continent in a critical time in the history of this fossil group.Fil: López, Fernando Enrique. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Conde, Osvaldo Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Braeckman, Alejandro R.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; ArgentinaFil: Segura, Diego G.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; ArgentinaFil: Drovandi, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; ArgentinaFil: Bueno, Andrea J.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; ArgentinaFil: Abarca, Ulises. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; ArgentinaPolish Academy of Sciences. Institute of Paleobiology2024-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/266512López, Fernando Enrique; Conde, Osvaldo Agustin; Braeckman, Alejandro R.; Segura, Diego G.; Drovandi, Juan Martín; et al.; New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks; Polish Academy of Sciences. Institute of Paleobiology; Acta Palaeontologica Polonica; 69; 9-2024; 351-3700567-79201732-2421CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.app.pan.pl/article/item/app011392024.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.4202/app.01139.2024info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:03:01Zoai:ri.conicet.gov.ar:11336/266512instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:03:01.85CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
title New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
spellingShingle New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
López, Fernando Enrique
Graptolithina
Biostratigraphy
Gorstian Stage
Ludlow Series
Los Espejos Formation
Precordillera
Argentina
South America
title_short New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
title_full New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
title_fullStr New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
title_full_unstemmed New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
title_sort New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks
dc.creator.none.fl_str_mv López, Fernando Enrique
Conde, Osvaldo Agustin
Braeckman, Alejandro R.
Segura, Diego G.
Drovandi, Juan Martín
Bueno, Andrea J.
Abarca, Ulises
author López, Fernando Enrique
author_facet López, Fernando Enrique
Conde, Osvaldo Agustin
Braeckman, Alejandro R.
Segura, Diego G.
Drovandi, Juan Martín
Bueno, Andrea J.
Abarca, Ulises
author_role author
author2 Conde, Osvaldo Agustin
Braeckman, Alejandro R.
Segura, Diego G.
Drovandi, Juan Martín
Bueno, Andrea J.
Abarca, Ulises
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Graptolithina
Biostratigraphy
Gorstian Stage
Ludlow Series
Los Espejos Formation
Precordillera
Argentina
South America
topic Graptolithina
Biostratigraphy
Gorstian Stage
Ludlow Series
Los Espejos Formation
Precordillera
Argentina
South America
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Graptolites represent one of the most important index fossils for the lower to middle Paleozoic biostratigraphy worldwide. Compared to other regions, graptolite faunas exhibited a marked decrease in diversity in Argentina during the Silurian, what resulted in reduced and low-varied registers and denied biostratigraphic works in its territory. This study introduces new Silurian graptolite faunas from the Los Espejos Formation, Poblete Norte section, Central Precordillera of Argentina. A total of thirteen graptolitic levels were identified, containing Bohemograptus bohemicus, Lobograptus sp., Saetograptus argentinus argentinus, Saetograptus cf. S. varians, Uncinatograptus uncinatus notouncinatus, Uncinatograptus elsae sp. nov., and Uncinatograptus lisandroi sp. nov. The occurrence of Uncinatograptus spp. in association with B. bohemicus could indicate the presence of the lower Gorstian Neodiversograptus nilssoni Biozone. A few meters above, the finding of S. a. argentinus in association with S. cf. S. varians, U. u. notouncinatus, and Lobograptus sp. suggest the presence of the lower Gorstian Lobograptus progenitor Biozone. The upper graptolitic beds yield specimens of S. a. argentinus and B. bohemicus, suggesting late Gorstian to early Ludfordian ages. These new graptolite faunas allow to correlate more precisely with local (Precordillera and Famatina), regional (North Western Argentina and Bolivia) and global equivalent sections. This discovery introduces new graptolite faunas, first-time recorded in South America, proposes for the first time a graptolite biostratigraphy for the Ludlow of Precordillera, and complements so far insufficient knowledge on Ludlovian graptolitic faunas of the continent in a critical time in the history of this fossil group.
Fil: López, Fernando Enrique. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina
Fil: Conde, Osvaldo Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Braeckman, Alejandro R.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
Fil: Segura, Diego G.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
Fil: Drovandi, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Centro de Investigaciones de la Geosfera y Biosfera. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones de la Geosfera y Biosfera; Argentina
Fil: Bueno, Andrea J.. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
Fil: Abarca, Ulises. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; Argentina
description Graptolites represent one of the most important index fossils for the lower to middle Paleozoic biostratigraphy worldwide. Compared to other regions, graptolite faunas exhibited a marked decrease in diversity in Argentina during the Silurian, what resulted in reduced and low-varied registers and denied biostratigraphic works in its territory. This study introduces new Silurian graptolite faunas from the Los Espejos Formation, Poblete Norte section, Central Precordillera of Argentina. A total of thirteen graptolitic levels were identified, containing Bohemograptus bohemicus, Lobograptus sp., Saetograptus argentinus argentinus, Saetograptus cf. S. varians, Uncinatograptus uncinatus notouncinatus, Uncinatograptus elsae sp. nov., and Uncinatograptus lisandroi sp. nov. The occurrence of Uncinatograptus spp. in association with B. bohemicus could indicate the presence of the lower Gorstian Neodiversograptus nilssoni Biozone. A few meters above, the finding of S. a. argentinus in association with S. cf. S. varians, U. u. notouncinatus, and Lobograptus sp. suggest the presence of the lower Gorstian Lobograptus progenitor Biozone. The upper graptolitic beds yield specimens of S. a. argentinus and B. bohemicus, suggesting late Gorstian to early Ludfordian ages. These new graptolite faunas allow to correlate more precisely with local (Precordillera and Famatina), regional (North Western Argentina and Bolivia) and global equivalent sections. This discovery introduces new graptolite faunas, first-time recorded in South America, proposes for the first time a graptolite biostratigraphy for the Ludlow of Precordillera, and complements so far insufficient knowledge on Ludlovian graptolitic faunas of the continent in a critical time in the history of this fossil group.
publishDate 2024
dc.date.none.fl_str_mv 2024-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/266512
López, Fernando Enrique; Conde, Osvaldo Agustin; Braeckman, Alejandro R.; Segura, Diego G.; Drovandi, Juan Martín; et al.; New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks; Polish Academy of Sciences. Institute of Paleobiology; Acta Palaeontologica Polonica; 69; 9-2024; 351-370
0567-7920
1732-2421
CONICET Digital
CONICET
url http://hdl.handle.net/11336/266512
identifier_str_mv López, Fernando Enrique; Conde, Osvaldo Agustin; Braeckman, Alejandro R.; Segura, Diego G.; Drovandi, Juan Martín; et al.; New Ludlovian (Silurian) graptolite faunas from Los Espejos Formation, Central Precordillera, San Juan Province, Argentina: correlations and biostratigraphic remarks; Polish Academy of Sciences. Institute of Paleobiology; Acta Palaeontologica Polonica; 69; 9-2024; 351-370
0567-7920
1732-2421
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.app.pan.pl/article/item/app011392024.html
info:eu-repo/semantics/altIdentifier/doi/10.4202/app.01139.2024
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Polish Academy of Sciences. Institute of Paleobiology
publisher.none.fl_str_mv Polish Academy of Sciences. Institute of Paleobiology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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