Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada
A detailed study of Late Ordovician-early Silurian acritarchs (Palaeozoic phytoplankton) from Anticosti Island (Quebec, Canada) revealed an unusually high abundance of abnormal forms from the upper Hirnantian carbonate strata (uppermost Ordovician) of the Ellis Bay Formation in the western part of t...
Published in: | Review of Palaeobotany and Palynology |
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Online Access: | http://hdl.handle.net/11584/89452 https://doi.org/10.1016/j.revpalbo.2011.10.010 |
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ftunicagliariris:oai:iris.unica.it:11584/89452 2024-04-21T08:05:01+00:00 Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada Delabroye A Munnecke A Servais T Vandenbroucke TRA VECOLI, MARCO Delabroye, A Munnecke, A Servais, T Vandenbroucke, Tra Vecoli, Marco 2012 http://hdl.handle.net/11584/89452 https://doi.org/10.1016/j.revpalbo.2011.10.010 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000302985500004 volume:173 firstpage:46 lastpage:56 numberofpages:11 journal:REVIEW OF PALAEOBOTANY AND PALYNOLOGY http://hdl.handle.net/11584/89452 doi:10.1016/j.revpalbo.2011.10.010 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84858650311 info:eu-repo/semantics/article 2012 ftunicagliariris https://doi.org/10.1016/j.revpalbo.2011.10.010 2024-03-25T16:06:07Z A detailed study of Late Ordovician-early Silurian acritarchs (Palaeozoic phytoplankton) from Anticosti Island (Quebec, Canada) revealed an unusually high abundance of abnormal forms from the upper Hirnantian carbonate strata (uppermost Ordovician) of the Ellis Bay Formation in the western part of the island (member 6, Spinachitina taugourdeaui chitinozoan Biozone). The objective of this paper is to describe these abnormal forms in detail. Two species are particularly affected: Disparifusa psakadoria Loeblich and Tappan, 1978 presents abnormally hypertrophied central vesicles, whereas Peteinosphaeridium laframboisepointense nov. sp. has appendices that are fused along their length. The abnormal forms of acritarchs occur in rocks deposited during periods that are near time-equivalents to those of maximum ice-sheet extensions on Gondwana during the Hirnantian glaciation. Although this stratigraphic level corresponds to an interval of strong perturbations of the global carbon cycle, the exact factors causing the observed malformations remain unknown. (C) 2011 Published by Elsevier B.V. Article in Journal/Newspaper Ice Sheet Università degli Studi di Cagliari: UNICA IRIS Review of Palaeobotany and Palynology 173 46 56 |
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Università degli Studi di Cagliari: UNICA IRIS |
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ftunicagliariris |
language |
English |
description |
A detailed study of Late Ordovician-early Silurian acritarchs (Palaeozoic phytoplankton) from Anticosti Island (Quebec, Canada) revealed an unusually high abundance of abnormal forms from the upper Hirnantian carbonate strata (uppermost Ordovician) of the Ellis Bay Formation in the western part of the island (member 6, Spinachitina taugourdeaui chitinozoan Biozone). The objective of this paper is to describe these abnormal forms in detail. Two species are particularly affected: Disparifusa psakadoria Loeblich and Tappan, 1978 presents abnormally hypertrophied central vesicles, whereas Peteinosphaeridium laframboisepointense nov. sp. has appendices that are fused along their length. The abnormal forms of acritarchs occur in rocks deposited during periods that are near time-equivalents to those of maximum ice-sheet extensions on Gondwana during the Hirnantian glaciation. Although this stratigraphic level corresponds to an interval of strong perturbations of the global carbon cycle, the exact factors causing the observed malformations remain unknown. (C) 2011 Published by Elsevier B.V. |
author2 |
Delabroye, A Munnecke, A Servais, T Vandenbroucke, Tra Vecoli, Marco |
format |
Article in Journal/Newspaper |
author |
Delabroye A Munnecke A Servais T Vandenbroucke TRA VECOLI, MARCO |
spellingShingle |
Delabroye A Munnecke A Servais T Vandenbroucke TRA VECOLI, MARCO Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada |
author_facet |
Delabroye A Munnecke A Servais T Vandenbroucke TRA VECOLI, MARCO |
author_sort |
Delabroye A |
title |
Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada |
title_short |
Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada |
title_full |
Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada |
title_fullStr |
Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada |
title_full_unstemmed |
Abnormal forms of acritarchs (phytoplankton) in the upper Hirnantian (Upper Ordovician) of Anticosti Island, Canada |
title_sort |
abnormal forms of acritarchs (phytoplankton) in the upper hirnantian (upper ordovician) of anticosti island, canada |
publishDate |
2012 |
url |
http://hdl.handle.net/11584/89452 https://doi.org/10.1016/j.revpalbo.2011.10.010 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000302985500004 volume:173 firstpage:46 lastpage:56 numberofpages:11 journal:REVIEW OF PALAEOBOTANY AND PALYNOLOGY http://hdl.handle.net/11584/89452 doi:10.1016/j.revpalbo.2011.10.010 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84858650311 |
op_doi |
https://doi.org/10.1016/j.revpalbo.2011.10.010 |
container_title |
Review of Palaeobotany and Palynology |
container_volume |
173 |
container_start_page |
46 |
op_container_end_page |
56 |
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