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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ftunibueairesbd:todo:paper_01916122_v38_n2_p303_Amenabar 2023-10-29T02:31:39+01:00 Small Antarctic Late Cretaceous chorate dinoflagellate cysts: Biological and palaeoenvironmental affinities Amenábar, C.R. Candel, M.S. Guerstein, G.R. https://hdl.handle.net/20.500.12110/paper_01916122_v38_n2_p303_Amenabar unknown http://hdl.handle.net/20.500.12110/paper_01916122_v38_n2_p303_Amenabar info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Antarctica Argentina dinoflagellate cysts Late CretaceousHolocene modern analogues palaeoenvironment biostratigraphy Cretaceous dinoflagellate cyst Holocene ice cover micropaleontology paleoenvironment palynology palynomorph sea ice Dinophyceae JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_01916122_v38_n2_p303_Amenabar 2023-10-05T01:30:56Z 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. © 2014 AASP - The Palynological Society. Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
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Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Antarctica Argentina dinoflagellate cysts Late CretaceousHolocene modern analogues palaeoenvironment biostratigraphy Cretaceous dinoflagellate cyst Holocene ice cover micropaleontology paleoenvironment palynology palynomorph sea ice Dinophyceae |
spellingShingle |
Antarctica Argentina dinoflagellate cysts Late CretaceousHolocene modern analogues palaeoenvironment biostratigraphy Cretaceous dinoflagellate cyst Holocene ice cover micropaleontology paleoenvironment palynology palynomorph sea ice Dinophyceae Amenábar, C.R. Candel, M.S. Guerstein, G.R. Small Antarctic Late Cretaceous chorate dinoflagellate cysts: Biological and palaeoenvironmental affinities |
topic_facet |
Antarctica Argentina dinoflagellate cysts Late CretaceousHolocene modern analogues palaeoenvironment biostratigraphy Cretaceous dinoflagellate cyst Holocene ice cover micropaleontology paleoenvironment palynology palynomorph sea ice Dinophyceae |
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. © 2014 AASP - The Palynological Society. |
format |
Journal/Newspaper |
author |
Amenábar, C.R. Candel, M.S. Guerstein, G.R. |
author_facet |
Amenábar, C.R. Candel, M.S. Guerstein, G.R. |
author_sort |
Amenábar, C.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 |
url |
https://hdl.handle.net/20.500.12110/paper_01916122_v38_n2_p303_Amenabar |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
http://hdl.handle.net/20.500.12110/paper_01916122_v38_n2_p303_Amenabar |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_01916122_v38_n2_p303_Amenabar |
_version_ |
1781052351849693184 |