Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities
Small spiny marine palynomorphs have been the focus of recent palynological studies since their high proportions in Antarctic Late Cretaceous and Cenozoic assemblages were noted. These palynomorphs were assigned to the dinoflagellate cyst Impletosphaeridium clavus and they were believed to have had...
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ftconicet:oai:ri.conicet.gov.ar:11336/5512 2023-10-09T21:46:14+02:00 Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities Amenabar, Cecilia R. Candel, Maria Soledad Guerstein, Gladys Raquel application/pdf http://hdl.handle.net/11336/5512 eng eng Taylor & Francis info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/01916122.2014.907829 info:eu-repo/semantics/altIdentifier/doi/10.1080/01916122.2014.907829 info:eu-repo/semantics/altIdentifier/doi/ http://hdl.handle.net/11336/5512 Amenabar, Cecilia R.; Candel, Maria Soledad; Guerstein, Gladys Raquel; Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities; Taylor & Francis; Palynology; 38; 2; 9-2014; 303-323 0191-6122 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Dinoflagellate Cysts Modern Analogues Palaeoenvironment Late Cretaceous-Holocene Antarctica https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1080/01916122.2014.907829 2023-09-24T18:32:40Z Small spiny marine palynomorphs have been the focus of recent palynological studies since their high proportions in Antarctic Late Cretaceous and Cenozoic assemblages were noted. These palynomorphs were assigned to the dinoflagellate cyst Impletosphaeridium clavus and they were believed to have had an affinity with some modern round brown spiny cysts (RBSCs). Our study aims to analyse there together with potential modern analogues by comparing Late Cretaceous and Cenozoic Antarctic specimens with some RBSCs recorded from the Holocene of southern Argentina. We confirm several features in common between these specimens, although differences in processes and the cyst wall are observed. The species could have been produced by dinoflagellates similar to those that generate some RBSCs. Their abundance in the Late Cretaceous may have occurred in response to short term cooling pulses without development of sea-ice cover. Cenozoic records are considered to be reworked, restricting the stratigraphical range of Impletosphaeridium clavus. Fil: Amenabar, Cecilia R. Ministerio de Relaciones Exteriores, Comercio Internacional y Culto. Direccion Nacional del Antártico. Instituto Antártico Argentino. Instituto Antártico Argentino - Sede Cricyt (Mendoza); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos; Argentina Fil: Candel, Maria Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina Fil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina Article in Journal/Newspaper Antarc* Antarctic Antarctica Instituto Antártico Argentino Sea ice CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Argentino Argentina Palynology 38 2 303 323 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Dinoflagellate Cysts Modern Analogues Palaeoenvironment Late Cretaceous-Holocene Antarctica https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Dinoflagellate Cysts Modern Analogues Palaeoenvironment Late Cretaceous-Holocene Antarctica https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Amenabar, Cecilia R. Candel, Maria Soledad Guerstein, Gladys Raquel Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities |
topic_facet |
Dinoflagellate Cysts Modern Analogues Palaeoenvironment Late Cretaceous-Holocene Antarctica https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Small spiny marine palynomorphs have been the focus of recent palynological studies since their high proportions in Antarctic Late Cretaceous and Cenozoic assemblages were noted. These palynomorphs were assigned to the dinoflagellate cyst Impletosphaeridium clavus and they were believed to have had an affinity with some modern round brown spiny cysts (RBSCs). Our study aims to analyse there together with potential modern analogues by comparing Late Cretaceous and Cenozoic Antarctic specimens with some RBSCs recorded from the Holocene of southern Argentina. We confirm several features in common between these specimens, although differences in processes and the cyst wall are observed. The species could have been produced by dinoflagellates similar to those that generate some RBSCs. Their abundance in the Late Cretaceous may have occurred in response to short term cooling pulses without development of sea-ice cover. Cenozoic records are considered to be reworked, restricting the stratigraphical range of Impletosphaeridium clavus. Fil: Amenabar, Cecilia R. Ministerio de Relaciones Exteriores, Comercio Internacional y Culto. Direccion Nacional del Antártico. Instituto Antártico Argentino. Instituto Antártico Argentino - Sede Cricyt (Mendoza); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos; Argentina Fil: Candel, Maria Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina Fil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina |
format |
Article in Journal/Newspaper |
author |
Amenabar, Cecilia R. Candel, Maria Soledad Guerstein, Gladys Raquel |
author_facet |
Amenabar, Cecilia R. Candel, Maria Soledad Guerstein, Gladys Raquel |
author_sort |
Amenabar, Cecilia R. |
title |
Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities |
title_short |
Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities |
title_full |
Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities |
title_fullStr |
Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities |
title_full_unstemmed |
Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities |
title_sort |
small antarctic late cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities |
publisher |
Taylor & Francis |
url |
http://hdl.handle.net/11336/5512 |
geographic |
Antarctic Argentino Argentina |
geographic_facet |
Antarctic Argentino Argentina |
genre |
Antarc* Antarctic Antarctica Instituto Antártico Argentino Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Instituto Antártico Argentino Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/01916122.2014.907829 info:eu-repo/semantics/altIdentifier/doi/10.1080/01916122.2014.907829 info:eu-repo/semantics/altIdentifier/doi/ http://hdl.handle.net/11336/5512 Amenabar, Cecilia R.; Candel, Maria Soledad; Guerstein, Gladys Raquel; Small Antarctic Late Cretaceous chorate dinoflagellate cysts: biological and palaeoenvironmental affinities; Taylor & Francis; Palynology; 38; 2; 9-2014; 303-323 0191-6122 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1080/01916122.2014.907829 |
container_title |
Palynology |
container_volume |
38 |
container_issue |
2 |
container_start_page |
303 |
op_container_end_page |
323 |
_version_ |
1779321877157642240 |