Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic
Eunotia is the largest and most diverse genus within the family Eunotiaceae, a primarily freshwater group of diatoms often found in dilute, acidic and humic-stained environments. Species in this genus are characterized by being asymmetric along their apical axis, symmetric about the transapical axis...
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ftmagnoliapress:oai:https://mapress.com/oai/:article/47145 2023-05-15T14:59:24+02:00 Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic SIVER, PETER A. ODDSUND, ERIK LOTT, ANNE M. 2022-09-30 application/pdf https://www.mapress.com/pt/article/view/phytotaxa.567.1.2 eng eng Magnolia press https://www.mapress.com/pt/article/view/phytotaxa.567.1.2/48689 https://www.mapress.com/pt/article/view/phytotaxa.567.1.2 Copyright (c) 2022 Phytotaxa Phytotaxa; Vol. 567 No. 1: 30 September 2022; 21-35 1179-3163 1179-3155 10.11646/phytotaxa.567.1 acidic ecology freshwater Giraffe Pipe new species raphe Algae info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftmagnoliapress https://doi.org/10.11646/phytotaxa.567.1 2022-10-11T17:11:59Z Eunotia is the largest and most diverse genus within the family Eunotiaceae, a primarily freshwater group of diatoms often found in dilute, acidic and humic-stained environments. Species in this genus are characterized by being asymmetric along their apical axis, symmetric about the transapical axis, and with a simple and reduced raphe system situated largely on the mantle and restricted to the apical ends of the valve. In addition, Eunotia taxa have one or more rimoportula per valve, usually close to the apex. Because of their reduced raphe system, coupled with the presence of rimoportulae, Eunotia and its relatives are often viewed as the oldest lineage of raphe-bearing diatoms. To date, the oldest remains of Eunotia species have been reported from the early to middle Eocene, including from the Giraffe Pipe locality, an ancient Eocene fossil site located in northern Canada near the Arctic Circle. Rocks from this site contain a large and diverse assemblage of Eunotia taxa. The purpose of this study is to begin to characterize this assemblage with descriptions of three new species, Eunotia giraffensis sp. nov., E. petasum sp. nov. and E. pseudonaegelii sp. nov. The new species, representing the longest specimens found at the Giraffe Pipe locality, each possess characteristics common to Eunotia making them easily assigned to this genus. Because the Eunotia lineage was well established by the early part of the Eocene, it is likely to be significantly older. Article in Journal/Newspaper Arctic Magnolia press Arctic Canada Phytotaxa 567 1 |
institution |
Open Polar |
collection |
Magnolia press |
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ftmagnoliapress |
language |
English |
topic |
acidic ecology freshwater Giraffe Pipe new species raphe Algae |
spellingShingle |
acidic ecology freshwater Giraffe Pipe new species raphe Algae SIVER, PETER A. ODDSUND, ERIK LOTT, ANNE M. Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic |
topic_facet |
acidic ecology freshwater Giraffe Pipe new species raphe Algae |
description |
Eunotia is the largest and most diverse genus within the family Eunotiaceae, a primarily freshwater group of diatoms often found in dilute, acidic and humic-stained environments. Species in this genus are characterized by being asymmetric along their apical axis, symmetric about the transapical axis, and with a simple and reduced raphe system situated largely on the mantle and restricted to the apical ends of the valve. In addition, Eunotia taxa have one or more rimoportula per valve, usually close to the apex. Because of their reduced raphe system, coupled with the presence of rimoportulae, Eunotia and its relatives are often viewed as the oldest lineage of raphe-bearing diatoms. To date, the oldest remains of Eunotia species have been reported from the early to middle Eocene, including from the Giraffe Pipe locality, an ancient Eocene fossil site located in northern Canada near the Arctic Circle. Rocks from this site contain a large and diverse assemblage of Eunotia taxa. The purpose of this study is to begin to characterize this assemblage with descriptions of three new species, Eunotia giraffensis sp. nov., E. petasum sp. nov. and E. pseudonaegelii sp. nov. The new species, representing the longest specimens found at the Giraffe Pipe locality, each possess characteristics common to Eunotia making them easily assigned to this genus. Because the Eunotia lineage was well established by the early part of the Eocene, it is likely to be significantly older. |
format |
Article in Journal/Newspaper |
author |
SIVER, PETER A. ODDSUND, ERIK LOTT, ANNE M. |
author_facet |
SIVER, PETER A. ODDSUND, ERIK LOTT, ANNE M. |
author_sort |
SIVER, PETER A. |
title |
Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic |
title_short |
Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic |
title_full |
Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic |
title_fullStr |
Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic |
title_full_unstemmed |
Descriptions of three new diatom species in the genus Eunotia (Eunotiaceae, Bacillariophyta) from the Eocene Arctic |
title_sort |
descriptions of three new diatom species in the genus eunotia (eunotiaceae, bacillariophyta) from the eocene arctic |
publisher |
Magnolia press |
publishDate |
2022 |
url |
https://www.mapress.com/pt/article/view/phytotaxa.567.1.2 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Phytotaxa; Vol. 567 No. 1: 30 September 2022; 21-35 1179-3163 1179-3155 10.11646/phytotaxa.567.1 |
op_relation |
https://www.mapress.com/pt/article/view/phytotaxa.567.1.2/48689 https://www.mapress.com/pt/article/view/phytotaxa.567.1.2 |
op_rights |
Copyright (c) 2022 Phytotaxa |
op_doi |
https://doi.org/10.11646/phytotaxa.567.1 |
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Phytotaxa |
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567 |
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1 |
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1766331503526019072 |