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....
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Copernicus Publications
2021
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ftdoajarticles:oai:doaj.org/article:758c25532175457a9cfa9317e925b8c3 2023-05-15T14:55:45+02:00 Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic–North Atlantic domain A. G. Cage A. J. Pieńkowski A. Jennings K. L. Knudsen M.-S. Seidenkrantz 2021-03-01T00:00:00Z https://doi.org/10.5194/jm-40-37-2021 https://doaj.org/article/758c25532175457a9cfa9317e925b8c3 EN eng Copernicus Publications https://jm.copernicus.org/articles/40/37/2021/jm-40-37-2021.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-40-37-2021 0262-821X 2041-4978 https://doaj.org/article/758c25532175457a9cfa9317e925b8c3 Journal of Micropalaeontology, Vol 40, Pp 37-60 (2021) Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/jm-40-37-2021 2022-12-31T07:46:49Z 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 ... Article in Journal/Newspaper Arctic Foraminifera* North Atlantic Directory of Open Access Journals: DOAJ Articles Arctic Journal of Micropalaeontology 40 1 37 60 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 A. G. Cage A. J. Pieńkowski A. Jennings K. L. Knudsen M.-S. Seidenkrantz Comparative analysis of six common foraminiferal species of the genera Cassidulina , Paracassidulina , and Islandiella from the Arctic–North Atlantic domain |
topic_facet |
Geology QE1-996.5 |
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 ... |
format |
Article in Journal/Newspaper |
author |
A. G. Cage A. J. Pieńkowski A. Jennings K. L. Knudsen M.-S. Seidenkrantz |
author_facet |
A. G. Cage A. J. Pieńkowski A. Jennings K. L. Knudsen M.-S. Seidenkrantz |
author_sort |
A. G. Cage |
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 |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/jm-40-37-2021 https://doaj.org/article/758c25532175457a9cfa9317e925b8c3 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Foraminifera* North Atlantic |
genre_facet |
Arctic Foraminifera* North Atlantic |
op_source |
Journal of Micropalaeontology, Vol 40, Pp 37-60 (2021) |
op_relation |
https://jm.copernicus.org/articles/40/37/2021/jm-40-37-2021.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-40-37-2021 0262-821X 2041-4978 https://doaj.org/article/758c25532175457a9cfa9317e925b8c3 |
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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1766327766059319296 |