The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition
Species in the genera Hexasterias and Halodinium have been recorded over the last decades as acritarchs in palynological and/or plankton studies. In paleoenvironmental studies, these resting stages are often interpreted as indicators of freshwater input. The biological affinity of these genera has n...
Published in: | European Journal of Protistology |
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Elsevier Gmbh, Urban & Fischer Verlag
2018
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Online Access: | https://archimer.ifremer.fr/doc/00468/57970/64186.pdf https://doi.org/10.1016/j.ejop.2018.09.002 https://archimer.ifremer.fr/doc/00468/57970/ |
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ftarchimer:oai:archimer.ifremer.fr:57970 2023-05-15T15:08:36+02:00 The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition Gurdebeke, Pieter R. Mertens, Kenneth Takano, Yoshihito Yamaguchi, Aika Bogus, Kara Dunthorn, Micah Matsuoka, Kazumi Vrielinck, Henk Louwye, Stephen 2018-10 application/pdf https://archimer.ifremer.fr/doc/00468/57970/64186.pdf https://doi.org/10.1016/j.ejop.2018.09.002 https://archimer.ifremer.fr/doc/00468/57970/ eng eng Elsevier Gmbh, Urban & Fischer Verlag https://archimer.ifremer.fr/doc/00468/57970/64186.pdf doi:10.1016/j.ejop.2018.09.002 https://archimer.ifremer.fr/doc/00468/57970/ info:eu-repo/semantics/openAccess restricted use European Journal Of Protistology (0932-4739) (Elsevier Gmbh, Urban & Fischer Verlag), 2018-10 , Vol. 66 , P. 115-135 Acritarch Ciliate cyst FTIR LSU-SSU rDNA Prostomatida Taxonomy text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1016/j.ejop.2018.09.002 2021-09-23T20:31:51Z Species in the genera Hexasterias and Halodinium have been recorded over the last decades as acritarchs in palynological and/or plankton studies. In paleoenvironmental studies, these resting stages are often interpreted as indicators of freshwater input. The biological affinity of these genera has never been definitely established. Here, a new species, Halodinium verrucatum sp. nov., is described and molecular evidence (single specimen SSU and LSU rDNA sequencing) reveals that both this new species and Hexasterias problematica, collected from sediment samples in the Skagerrak and Baltic Sea, are resting stages of prorodontid ciliates. Additionally, infrared spectroscopic analysis (micro-FTIR) of Hexasterias problematica and Halodinium spp. specimens indicates a carbohydrate-based composition of the cyst wall with evidence for nitrogen-containing functional groups. A similar composition is recorded for tintinnid loricae, which further supports the placement of Hexasterias and Halodinium as ciliate cysts, and the composition is consistent with the heterotrophic nature of ciliates. The morphologically similar species Radiosperma corbiferum has a comparable composition, suggesting a similar ciliate affinity and indicating the utility of micro-FTIR in understanding acritarch affinity. Hexasterias problematica typically occurs in coastal waters from temperate to arctic regions. Halodinium verrucatum sp. nov. is observed in temperate estuarine sediments in the northern hemisphere. Article in Journal/Newspaper Arctic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic European Journal of Protistology 66 115 135 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Acritarch Ciliate cyst FTIR LSU-SSU rDNA Prostomatida Taxonomy |
spellingShingle |
Acritarch Ciliate cyst FTIR LSU-SSU rDNA Prostomatida Taxonomy Gurdebeke, Pieter R. Mertens, Kenneth Takano, Yoshihito Yamaguchi, Aika Bogus, Kara Dunthorn, Micah Matsuoka, Kazumi Vrielinck, Henk Louwye, Stephen The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition |
topic_facet |
Acritarch Ciliate cyst FTIR LSU-SSU rDNA Prostomatida Taxonomy |
description |
Species in the genera Hexasterias and Halodinium have been recorded over the last decades as acritarchs in palynological and/or plankton studies. In paleoenvironmental studies, these resting stages are often interpreted as indicators of freshwater input. The biological affinity of these genera has never been definitely established. Here, a new species, Halodinium verrucatum sp. nov., is described and molecular evidence (single specimen SSU and LSU rDNA sequencing) reveals that both this new species and Hexasterias problematica, collected from sediment samples in the Skagerrak and Baltic Sea, are resting stages of prorodontid ciliates. Additionally, infrared spectroscopic analysis (micro-FTIR) of Hexasterias problematica and Halodinium spp. specimens indicates a carbohydrate-based composition of the cyst wall with evidence for nitrogen-containing functional groups. A similar composition is recorded for tintinnid loricae, which further supports the placement of Hexasterias and Halodinium as ciliate cysts, and the composition is consistent with the heterotrophic nature of ciliates. The morphologically similar species Radiosperma corbiferum has a comparable composition, suggesting a similar ciliate affinity and indicating the utility of micro-FTIR in understanding acritarch affinity. Hexasterias problematica typically occurs in coastal waters from temperate to arctic regions. Halodinium verrucatum sp. nov. is observed in temperate estuarine sediments in the northern hemisphere. |
format |
Article in Journal/Newspaper |
author |
Gurdebeke, Pieter R. Mertens, Kenneth Takano, Yoshihito Yamaguchi, Aika Bogus, Kara Dunthorn, Micah Matsuoka, Kazumi Vrielinck, Henk Louwye, Stephen |
author_facet |
Gurdebeke, Pieter R. Mertens, Kenneth Takano, Yoshihito Yamaguchi, Aika Bogus, Kara Dunthorn, Micah Matsuoka, Kazumi Vrielinck, Henk Louwye, Stephen |
author_sort |
Gurdebeke, Pieter R. |
title |
The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition |
title_short |
The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition |
title_full |
The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition |
title_fullStr |
The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition |
title_full_unstemmed |
The affiliation of Hexasterias problematica and Halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition |
title_sort |
affiliation of hexasterias problematica and halodinium verrucatum sp. nov. to ciliate cysts based on molecular phylogeny and cyst wall composition |
publisher |
Elsevier Gmbh, Urban & Fischer Verlag |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00468/57970/64186.pdf https://doi.org/10.1016/j.ejop.2018.09.002 https://archimer.ifremer.fr/doc/00468/57970/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
European Journal Of Protistology (0932-4739) (Elsevier Gmbh, Urban & Fischer Verlag), 2018-10 , Vol. 66 , P. 115-135 |
op_relation |
https://archimer.ifremer.fr/doc/00468/57970/64186.pdf doi:10.1016/j.ejop.2018.09.002 https://archimer.ifremer.fr/doc/00468/57970/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.ejop.2018.09.002 |
container_title |
European Journal of Protistology |
container_volume |
66 |
container_start_page |
115 |
op_container_end_page |
135 |
_version_ |
1766339924869513216 |