Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions
The taxonomy of polycystine radiolarians is important for biostratigraphic, paleoecological and paleoceanographical reconstructions. In this study we describe four morphogroups of Actinomma boreale from the North-Atlantic and Arctic oceans. We distinguish them from two other four-shelled Actinomma s...
Published in: | Marine Micropaleontology |
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2014
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Online Access: | https://dare.uva.nl/personal/pure/en/publications/inter-and-intraspecific-morphological-variation-of-fourshelled-actinomma-taxa-radiolaria-in-polar-and-subpolar-regions(0d461c38-b1c2-46db-b02f-d2304282141b).html https://doi.org/10.1016/j.marmicro.2013.10.004 |
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ftunivamstpubl:oai:dare.uva.nl:openaire_cris_publications/0d461c38-b1c2-46db-b02f-d2304282141b 2024-09-30T14:24:26+00:00 Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions Burridge, A.K. Bjørklund, K.R. Kruglikova, S.B. Hammer, Ø. 2014 https://dare.uva.nl/personal/pure/en/publications/inter-and-intraspecific-morphological-variation-of-fourshelled-actinomma-taxa-radiolaria-in-polar-and-subpolar-regions(0d461c38-b1c2-46db-b02f-d2304282141b).html https://doi.org/10.1016/j.marmicro.2013.10.004 eng eng https://dare.uva.nl/personal/pure/en/publications/inter-and-intraspecific-morphological-variation-of-fourshelled-actinomma-taxa-radiolaria-in-polar-and-subpolar-regions(0d461c38-b1c2-46db-b02f-d2304282141b).html info:eu-repo/semantics/closedAccess Burridge , A K , Bjørklund , K R , Kruglikova , S B & Hammer , Ø 2014 , ' Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions ' , Marine Micropaleontology , vol. 110 , pp. 50-71 . https://doi.org/10.1016/j.marmicro.2013.10.004 article 2014 ftunivamstpubl https://doi.org/10.1016/j.marmicro.2013.10.004 2024-09-12T16:38:28Z The taxonomy of polycystine radiolarians is important for biostratigraphic, paleoecological and paleoceanographical reconstructions. In this study we describe four morphogroups of Actinomma boreale from the North-Atlantic and Arctic oceans. We distinguish them from two other four-shelled Actinomma species from the Southern Ocean and North Pacific, namely Sphaeropyle langii and Prunopyle antarctica, which are both moved to the genus Actinomma. As Actinomma antarcticum is an already occupied name, P. antarctica is renamed as Actinomma friedrichdreyeri nomen novum. Quantitative and qualitative intraspecific morphological variation was studied by examining 922 specimens (8599 photographs) from 49 samples, of which 45 are from the surface sediment, two are from deeper sediments, and two are plankton samples. We found significant differences in shell diameters between North Atlantic and Arctic Atlantic samples, and between recent and downcore samples within A. boreale. We also found significant differences between populations of A. friedrichdreyeri and A. langii from the Southern Ocean versus the North Pacific. We do not recommend the naming of extant polycystine radiolarian species based on continuous characters without supporting phylogenetic information. Therefore, with this study we have provided directions for phylogenetic investigations on A. boreale, A. friedrichdreyeri and A. langii. Article in Journal/Newspaper Antarc* Antarctica Arctic North Atlantic Southern Ocean Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) Arctic Pacific Southern Ocean Marine Micropaleontology 110 50 71 |
institution |
Open Polar |
collection |
Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) |
op_collection_id |
ftunivamstpubl |
language |
English |
description |
The taxonomy of polycystine radiolarians is important for biostratigraphic, paleoecological and paleoceanographical reconstructions. In this study we describe four morphogroups of Actinomma boreale from the North-Atlantic and Arctic oceans. We distinguish them from two other four-shelled Actinomma species from the Southern Ocean and North Pacific, namely Sphaeropyle langii and Prunopyle antarctica, which are both moved to the genus Actinomma. As Actinomma antarcticum is an already occupied name, P. antarctica is renamed as Actinomma friedrichdreyeri nomen novum. Quantitative and qualitative intraspecific morphological variation was studied by examining 922 specimens (8599 photographs) from 49 samples, of which 45 are from the surface sediment, two are from deeper sediments, and two are plankton samples. We found significant differences in shell diameters between North Atlantic and Arctic Atlantic samples, and between recent and downcore samples within A. boreale. We also found significant differences between populations of A. friedrichdreyeri and A. langii from the Southern Ocean versus the North Pacific. We do not recommend the naming of extant polycystine radiolarian species based on continuous characters without supporting phylogenetic information. Therefore, with this study we have provided directions for phylogenetic investigations on A. boreale, A. friedrichdreyeri and A. langii. |
format |
Article in Journal/Newspaper |
author |
Burridge, A.K. Bjørklund, K.R. Kruglikova, S.B. Hammer, Ø. |
spellingShingle |
Burridge, A.K. Bjørklund, K.R. Kruglikova, S.B. Hammer, Ø. Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions |
author_facet |
Burridge, A.K. Bjørklund, K.R. Kruglikova, S.B. Hammer, Ø. |
author_sort |
Burridge, A.K. |
title |
Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions |
title_short |
Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions |
title_full |
Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions |
title_fullStr |
Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions |
title_full_unstemmed |
Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions |
title_sort |
inter- and intraspecific morphological variation of four-shelled actinomma taxa (radiolaria) in polar and subpolar regions |
publishDate |
2014 |
url |
https://dare.uva.nl/personal/pure/en/publications/inter-and-intraspecific-morphological-variation-of-fourshelled-actinomma-taxa-radiolaria-in-polar-and-subpolar-regions(0d461c38-b1c2-46db-b02f-d2304282141b).html https://doi.org/10.1016/j.marmicro.2013.10.004 |
geographic |
Arctic Pacific Southern Ocean |
geographic_facet |
Arctic Pacific Southern Ocean |
genre |
Antarc* Antarctica Arctic North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctica Arctic North Atlantic Southern Ocean |
op_source |
Burridge , A K , Bjørklund , K R , Kruglikova , S B & Hammer , Ø 2014 , ' Inter- and intraspecific morphological variation of four-shelled Actinomma taxa (Radiolaria) in polar and subpolar regions ' , Marine Micropaleontology , vol. 110 , pp. 50-71 . https://doi.org/10.1016/j.marmicro.2013.10.004 |
op_relation |
https://dare.uva.nl/personal/pure/en/publications/inter-and-intraspecific-morphological-variation-of-fourshelled-actinomma-taxa-radiolaria-in-polar-and-subpolar-regions(0d461c38-b1c2-46db-b02f-d2304282141b).html |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.marmicro.2013.10.004 |
container_title |
Marine Micropaleontology |
container_volume |
110 |
container_start_page |
50 |
op_container_end_page |
71 |
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1811640968605073408 |