Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baquer...

Autores
Archangelsky, Ana; Andreis, Renato Rodolfo; Archangelsky, Sergio; Artabe, Analía Emilia Eva
Año de publicación
1995
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The cuticle of a new cycad, Pseudoctenis ornata Archangelsky et al., sp. nov. is described and discussed in relation to the physical paleoenvironment in which the plant lived. The specimens occur in the Early Cretaceous Baquero Formation, near Estancia El Verano in the Santa Cruz Province, Argentina. A detailed stratigraphic section records four facies, namely (1) fluvial channel, (2) flood plain, (3) lacustrine, and (4) flat and extended plains. A detail of each facies is provided. Pseudoctenis cuticles are found in the flood plain facies; the other components of the plant association are Gleichenites, Araucaria and Taeniopteris . The depositional history of this succession is related to a braided river that periodically received volcanic ash. Plants grew until complete burial by ash. Leaves of Pseudoctenis are pinnate, hypostomatic, with polycyclic stomata that form ill-defined rows. Abundant papillae and hair bases are present, especially on the lower cuticle. Comparisons are made with other Pseudoctenis species found in the same formation, and in other regions of the world. It is suggested that the paleoenvironment had a strong influence on the vegetation, especially the ash fall, and that it may have played a role in the formation of xeromorphic structures that characterize several gymnosperms present in this stratigraphic unit, including Pseudoctenis ornata . The lack of burning features on the cuticle suggests a cold ash fall. This fall probably was responsible for changes in edaphic patterns and atmospheric conditions that governed the growth and distribution of plant communities during the deposition of the Baquero Formation.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Cretaceous
Sedimentary depositional environment
Geology
Facies
Paleontology
Cycad
Stratigraphic section
Stratigraphic unit
Volcanic ash
Edaphic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/122868
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/122868
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró FormationArchangelsky, AnaAndreis, Renato RodolfoArchangelsky, SergioArtabe, Analía Emilia EvaCiencias NaturalesCretaceousSedimentary depositional environmentGeologyFaciesPaleontologyCycadStratigraphic sectionStratigraphic unitVolcanic ashEdaphicThe cuticle of a new cycad, Pseudoctenis ornata Archangelsky et al., sp. nov. is described and discussed in relation to the physical paleoenvironment in which the plant lived. The specimens occur in the Early Cretaceous Baquero Formation, near Estancia El Verano in the Santa Cruz Province, Argentina. A detailed stratigraphic section records four facies, namely (1) fluvial channel, (2) flood plain, (3) lacustrine, and (4) flat and extended plains. A detail of each facies is provided. Pseudoctenis cuticles are found in the flood plain facies; the other components of the plant association are Gleichenites, Araucaria and Taeniopteris . The depositional history of this succession is related to a braided river that periodically received volcanic ash. Plants grew until complete burial by ash. Leaves of Pseudoctenis are pinnate, hypostomatic, with polycyclic stomata that form ill-defined rows. Abundant papillae and hair bases are present, especially on the lower cuticle. Comparisons are made with other Pseudoctenis species found in the same formation, and in other regions of the world. It is suggested that the paleoenvironment had a strong influence on the vegetation, especially the ash fall, and that it may have played a role in the formation of xeromorphic structures that characterize several gymnosperms present in this stratigraphic unit, including Pseudoctenis ornata . The lack of burning features on the cuticle suggests a cold ash fall. This fall probably was responsible for changes in edaphic patterns and atmospheric conditions that governed the growth and distribution of plant communities during the deposition of the Baquero Formation.Facultad de Ciencias Naturales y Museo1995info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf213-233http://sedici.unlp.edu.ar/handle/10915/122868enginfo:eu-repo/semantics/altIdentifier/issn/0034-6667info:eu-repo/semantics/altIdentifier/doi/10.1016/0034-6667(95)00011-xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:21:07Zoai:sedici.unlp.edu.ar:10915/122868Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:21:07.824SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
title Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
spellingShingle Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
Archangelsky, Ana
Ciencias Naturales
Cretaceous
Sedimentary depositional environment
Geology
Facies
Paleontology
Cycad
Stratigraphic section
Stratigraphic unit
Volcanic ash
Edaphic
title_short Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
title_full Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
title_fullStr Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
title_full_unstemmed Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
title_sort Cuticular characters adapted to volcanic stress in a new Cretaceous cycad leaf from Patagonia, Argentina : Considerations on the stratigraphy and depositional history of the Baqueró Formation
dc.creator.none.fl_str_mv Archangelsky, Ana
Andreis, Renato Rodolfo
Archangelsky, Sergio
Artabe, Analía Emilia Eva
author Archangelsky, Ana
author_facet Archangelsky, Ana
Andreis, Renato Rodolfo
Archangelsky, Sergio
Artabe, Analía Emilia Eva
author_role author
author2 Andreis, Renato Rodolfo
Archangelsky, Sergio
Artabe, Analía Emilia Eva
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Cretaceous
Sedimentary depositional environment
Geology
Facies
Paleontology
Cycad
Stratigraphic section
Stratigraphic unit
Volcanic ash
Edaphic
topic Ciencias Naturales
Cretaceous
Sedimentary depositional environment
Geology
Facies
Paleontology
Cycad
Stratigraphic section
Stratigraphic unit
Volcanic ash
Edaphic
dc.description.none.fl_txt_mv The cuticle of a new cycad, Pseudoctenis ornata Archangelsky et al., sp. nov. is described and discussed in relation to the physical paleoenvironment in which the plant lived. The specimens occur in the Early Cretaceous Baquero Formation, near Estancia El Verano in the Santa Cruz Province, Argentina. A detailed stratigraphic section records four facies, namely (1) fluvial channel, (2) flood plain, (3) lacustrine, and (4) flat and extended plains. A detail of each facies is provided. Pseudoctenis cuticles are found in the flood plain facies; the other components of the plant association are Gleichenites, Araucaria and Taeniopteris . The depositional history of this succession is related to a braided river that periodically received volcanic ash. Plants grew until complete burial by ash. Leaves of Pseudoctenis are pinnate, hypostomatic, with polycyclic stomata that form ill-defined rows. Abundant papillae and hair bases are present, especially on the lower cuticle. Comparisons are made with other Pseudoctenis species found in the same formation, and in other regions of the world. It is suggested that the paleoenvironment had a strong influence on the vegetation, especially the ash fall, and that it may have played a role in the formation of xeromorphic structures that characterize several gymnosperms present in this stratigraphic unit, including Pseudoctenis ornata . The lack of burning features on the cuticle suggests a cold ash fall. This fall probably was responsible for changes in edaphic patterns and atmospheric conditions that governed the growth and distribution of plant communities during the deposition of the Baquero Formation.
Facultad de Ciencias Naturales y Museo
description The cuticle of a new cycad, Pseudoctenis ornata Archangelsky et al., sp. nov. is described and discussed in relation to the physical paleoenvironment in which the plant lived. The specimens occur in the Early Cretaceous Baquero Formation, near Estancia El Verano in the Santa Cruz Province, Argentina. A detailed stratigraphic section records four facies, namely (1) fluvial channel, (2) flood plain, (3) lacustrine, and (4) flat and extended plains. A detail of each facies is provided. Pseudoctenis cuticles are found in the flood plain facies; the other components of the plant association are Gleichenites, Araucaria and Taeniopteris . The depositional history of this succession is related to a braided river that periodically received volcanic ash. Plants grew until complete burial by ash. Leaves of Pseudoctenis are pinnate, hypostomatic, with polycyclic stomata that form ill-defined rows. Abundant papillae and hair bases are present, especially on the lower cuticle. Comparisons are made with other Pseudoctenis species found in the same formation, and in other regions of the world. It is suggested that the paleoenvironment had a strong influence on the vegetation, especially the ash fall, and that it may have played a role in the formation of xeromorphic structures that characterize several gymnosperms present in this stratigraphic unit, including Pseudoctenis ornata . The lack of burning features on the cuticle suggests a cold ash fall. This fall probably was responsible for changes in edaphic patterns and atmospheric conditions that governed the growth and distribution of plant communities during the deposition of the Baquero Formation.
publishDate 1995
dc.date.none.fl_str_mv 1995
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/122868
url http://sedici.unlp.edu.ar/handle/10915/122868
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0034-6667
info:eu-repo/semantics/altIdentifier/doi/10.1016/0034-6667(95)00011-x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
213-233
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.22299

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