Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain
Morphologically similar benthic foraminiferal taxa can be difficult to separate. Aside from causing issues in taxonomy, incorrect identifications complicate our understanding of species-specific ecological preferences and result in flawed palaeoenvironmental reconstructions and geochemical results....
Published in: | Journal of Micropalaeontology |
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2021
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Online Access: | https://pure.au.dk/portal/da/publications/comparative-analysis-of-six-common-foraminiferal-species-of-the-genera-cassidulina-paracassidulina-and-islandiella-from-the-arcticnorth-atlantic-domain(f3e226d7-8e41-4d8b-9a02-bc19c91bad43).html https://doi.org/10.5194/jm-40-37-2021 http://www.scopus.com/inward/record.url?scp=85103449849&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/f3e226d7-8e41-4d8b-9a02-bc19c91bad43 2023-05-15T14:25:52+02:00 Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain Cage, Alix G. Pieńkowski, Anna J. Jennings, Anne Luise Knudsen, Karen Seidenkrantz, Marit Solveig 2021-03 https://pure.au.dk/portal/da/publications/comparative-analysis-of-six-common-foraminiferal-species-of-the-genera-cassidulina-paracassidulina-and-islandiella-from-the-arcticnorth-atlantic-domain(f3e226d7-8e41-4d8b-9a02-bc19c91bad43).html https://doi.org/10.5194/jm-40-37-2021 http://www.scopus.com/inward/record.url?scp=85103449849&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Cage , A G , Pieńkowski , A J , Jennings , A , Luise Knudsen , K & Seidenkrantz , M S 2021 , ' Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain ' , Journal of Micropalaeontology , vol. 40 , no. 1 , pp. 37-60 . https://doi.org/10.5194/jm-40-37-2021 article 2021 ftuniaarhuspubl https://doi.org/10.5194/jm-40-37-2021 2021-04-14T22:44:52Z Morphologically similar benthic foraminiferal taxa can be difficult to separate. Aside from causing issues in taxonomy, incorrect identifications complicate our understanding of species-specific ecological preferences and result in flawed palaeoenvironmental reconstructions and geochemical results. Over the years, a number of studies have grouped together several key Arctic North Atlantic species in various combinations, despite their distinct environmental preferences and/or stratigraphical differences, causing great confusion in the literature. These species include Cassidulina laevigata, Cassidulina neoteretis, Cassidulina teretis, Paracassidulina neocarinata, Islandiella helenae, and Islandiella norcrossi. Here, we provide for the first time a detailed comparison of these taxa. We present a compilation of the original species descriptions, along with clear, illustrated guidelines on how to separate these taxa to circumvent taxonomic confusion. We acknowledge that some features cannot easily be seen with a standard low-powered microscope, especially if specimens are not well preserved. In those cases, we recommend the following actions: (i) always strive to make a precise identification and at least differentiate between the three genera; (ii) where C. neoteretis and C.Teretis cannot be separated, and where the stratigraphical context does not make the species identification obvious, specimens belonging to these taxa should be reported as C.Teretis/C. neoteretis; and (iii) where specimens in a sample cannot be confidently assigned to a specific species of Islandiella or Cassidulina, specimens should be grouped as Islandiella spp. or Cassidulina spp., followed by naming the most dominant species in brackets. The improved identification of Cassidulina, Paracassidulina, and Islandiella specimens will ensure development of a better understanding of the ecological affinities of these key Arctic North Atlantic taxa, consequently resulting in more accurate palaeoenvironmental reconstructions and geochemical data. Article in Journal/Newspaper Arctic Arctic Foraminifera* North Atlantic Aarhus University: Research Arctic Journal of Micropalaeontology 40 1 37 60 |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
Morphologically similar benthic foraminiferal taxa can be difficult to separate. Aside from causing issues in taxonomy, incorrect identifications complicate our understanding of species-specific ecological preferences and result in flawed palaeoenvironmental reconstructions and geochemical results. Over the years, a number of studies have grouped together several key Arctic North Atlantic species in various combinations, despite their distinct environmental preferences and/or stratigraphical differences, causing great confusion in the literature. These species include Cassidulina laevigata, Cassidulina neoteretis, Cassidulina teretis, Paracassidulina neocarinata, Islandiella helenae, and Islandiella norcrossi. Here, we provide for the first time a detailed comparison of these taxa. We present a compilation of the original species descriptions, along with clear, illustrated guidelines on how to separate these taxa to circumvent taxonomic confusion. We acknowledge that some features cannot easily be seen with a standard low-powered microscope, especially if specimens are not well preserved. In those cases, we recommend the following actions: (i) always strive to make a precise identification and at least differentiate between the three genera; (ii) where C. neoteretis and C.Teretis cannot be separated, and where the stratigraphical context does not make the species identification obvious, specimens belonging to these taxa should be reported as C.Teretis/C. neoteretis; and (iii) where specimens in a sample cannot be confidently assigned to a specific species of Islandiella or Cassidulina, specimens should be grouped as Islandiella spp. or Cassidulina spp., followed by naming the most dominant species in brackets. The improved identification of Cassidulina, Paracassidulina, and Islandiella specimens will ensure development of a better understanding of the ecological affinities of these key Arctic North Atlantic taxa, consequently resulting in more accurate palaeoenvironmental reconstructions and geochemical data. |
format |
Article in Journal/Newspaper |
author |
Cage, Alix G. Pieńkowski, Anna J. Jennings, Anne Luise Knudsen, Karen Seidenkrantz, Marit Solveig |
spellingShingle |
Cage, Alix G. Pieńkowski, Anna J. Jennings, Anne Luise Knudsen, Karen Seidenkrantz, Marit Solveig Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain |
author_facet |
Cage, Alix G. Pieńkowski, Anna J. Jennings, Anne Luise Knudsen, Karen Seidenkrantz, Marit Solveig |
author_sort |
Cage, Alix G. |
title |
Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain |
title_short |
Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain |
title_full |
Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain |
title_fullStr |
Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain |
title_full_unstemmed |
Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain |
title_sort |
comparative analysis of six common foraminiferal species of the genera cassidulina , paracassidulina , and islandiella from the arctic-north atlantic domain |
publishDate |
2021 |
url |
https://pure.au.dk/portal/da/publications/comparative-analysis-of-six-common-foraminiferal-species-of-the-genera-cassidulina-paracassidulina-and-islandiella-from-the-arcticnorth-atlantic-domain(f3e226d7-8e41-4d8b-9a02-bc19c91bad43).html https://doi.org/10.5194/jm-40-37-2021 http://www.scopus.com/inward/record.url?scp=85103449849&partnerID=8YFLogxK |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Foraminifera* North Atlantic |
genre_facet |
Arctic Arctic Foraminifera* North Atlantic |
op_source |
Cage , A G , Pieńkowski , A J , Jennings , A , Luise Knudsen , K & Seidenkrantz , M S 2021 , ' Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic-North Atlantic domain ' , Journal of Micropalaeontology , vol. 40 , no. 1 , pp. 37-60 . https://doi.org/10.5194/jm-40-37-2021 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/jm-40-37-2021 |
container_title |
Journal of Micropalaeontology |
container_volume |
40 |
container_issue |
1 |
container_start_page |
37 |
op_container_end_page |
60 |
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1766298349226426368 |