Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina

Autores
Iglesias, Ari; Luengo, Mariel Samanta; Zamuner, Alba Berta; Varela, Augusto Nicolás
Año de publicación
2012
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability.
Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina
Fil: Luengo, Mariel Samanta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Geología Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Varela, Augusto Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología
Corrientes
Argentina
Universidad Nacional del Nordeste
Materia
Early Angiosperms
Cretaceous environment
Austral Basin
Angiosperm dominated floras
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:11336/232920
Acceder
id CONICETDig_73b85e13ccc2513964b460d3ef2e976a
oai_identifier_str oai:ri.conicet.gov.ar:11336/232920
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Albian and Cenomanian angiosperm dominated floras from the Austral Basin, ArgentinaIglesias, AriLuengo, Mariel SamantaZamuner, Alba BertaVarela, Augusto NicolásEarly AngiospermsCretaceous environmentAustral BasinAngiosperm dominated florashttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability.Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; ArgentinaFil: Luengo, Mariel Samanta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Geología Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Varela, Augusto Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ArgentinaXV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de MelisopalinologíaCorrientesArgentinaUniversidad Nacional del NordesteAsociación Paleontológica Argentina2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/232920Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina; XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología; Corrientes; Argentina; 2012; 115-1151851-8044CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.ameghiniana.org.ar/index.php/ameghiniana/issue/view/58Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:39:33Zoai:ri.conicet.gov.ar:11336/232920instacron: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 14:39:34.05CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
title Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
spellingShingle Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
Iglesias, Ari
Early Angiosperms
Cretaceous environment
Austral Basin
Angiosperm dominated floras
title_short Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
title_full Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
title_fullStr Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
title_full_unstemmed Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
title_sort Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina
dc.creator.none.fl_str_mv Iglesias, Ari
Luengo, Mariel Samanta
Zamuner, Alba Berta
Varela, Augusto Nicolás
author Iglesias, Ari
author_facet Iglesias, Ari
Luengo, Mariel Samanta
Zamuner, Alba Berta
Varela, Augusto Nicolás
author_role author
author2 Luengo, Mariel Samanta
Zamuner, Alba Berta
Varela, Augusto Nicolás
author2_role author
author
author
dc.subject.none.fl_str_mv Early Angiosperms
Cretaceous environment
Austral Basin
Angiosperm dominated floras
topic Early Angiosperms
Cretaceous environment
Austral Basin
Angiosperm dominated floras
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability.
Fil: Iglesias, Ari. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina
Fil: Luengo, Mariel Samanta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Geología Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Zamuner, Alba Berta. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Área Paleobotánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Varela, Augusto Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología
Corrientes
Argentina
Universidad Nacional del Nordeste
description We described compression floras dominated by angiosperm in two Cretaceous formations in the area of the Tres Lagos town, Santa Cruz Province, Southern Patagonia. Four localities comprise a new flora at the highest levels of Piedra Clavada Formation (middle to upper Albian), which exhibit thirteen different leaf angiosperm forms of which only two are known in the overlying floras (middle Cenomanian) from Mata Amarilla Formation. Most leaf forms (MPM-PB) correspond to simple leaves of entire margin and pinnate venation with intramarginal veins and well developed drip-tips, follow in abundance by acrodromous and semicraspedodromous veined leaves, and palmatilobed forms. Associated to leaves there were found seeds, fruits, and flowers. The review of these floras and their recent certification of ages, state down that diversification and dominance of angiosperms occur very early in time at the Austral Basin. These data strengthen previous hypothesis based on palynofloras, establishing a floristic change characterized by a rapid diversification of angiosperms in the Albian. The new data suggest the need of a review of angiosperm evolutionary patterns in Patagonia with more precise geochronologic dates. During the Cenomanian, several floras of the world show the beginning and dominance of angiosperms in certain paleo-environments. But, it is evident that the flora of Piedra Clavada Formation is preserving a significant radiation of flowering plants that partly continue into the middle Cenomanian. The clues of this early radiation are unknown, but probably could be correlated with paleogeographic and paleoclimatic events at the middle Cretaceous and the angiosperm leaf photosynthetic capability.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Simposio
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/232920
Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina; XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología; Corrientes; Argentina; 2012; 115-115
1851-8044
CONICET Digital
CONICET
url http://hdl.handle.net/11336/232920
identifier_str_mv Albian and Cenomanian angiosperm dominated floras from the Austral Basin, Argentina; XV Simposio Argentino de Paleobotánica y Palinología y II Simposio Argentino de Melisopalinología; Corrientes; Argentina; 2012; 115-115
1851-8044
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.ameghiniana.org.ar/index.php/ameghiniana/issue/view/58
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.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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
_version_ 1846082881759215616
score 13.22299

Publicaciones similares