Gyrosigma obscurum Griffith et Henfrey
Gyrosigma cf. obscurum (W. Smith) Griffith et Henfrey (Figure 81) Literature: (Krammer and Lange-Bertalot 1986, p. 299, fig. 116: 1, 2; Patrick and Reimer 1966, p. 346, pl. 24, fig. 7). Description: Length 144–170 µm, width 9–11 µm, transverse striae 28–30 in 10 µm. Remarks: There has been controver...
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ftzenodo:oai:zenodo.org:11000235 2024-09-15T17:42:26+00:00 Gyrosigma obscurum Griffith et Henfrey Al-Handal, Adil Y. Torstensson, Anders Wulff, Angela 2022-02-23 https://doi.org/10.5281/zenodo.11000235 http://treatment.plazi.org/id/03C487C5430B737FFCEFFD6E775E9A31 unknown Zenodo https://doi.org/10.1515/bot-2021-0066 http://zenodo.org/record/11000147 http://publication.plazi.org/id/FFFDFFBD43067372FFD7FFF973479F53 https://sibils.text-analytics.ch/search/collections/plazi/03C487C5430B737FFCEFFD6E775E9A31 https://www.gbif.org/species/231563597 https://www.checklistbank.org/dataset/297141/taxon/03C487C5430B737FFCEFFD6E775E9A31.taxon https://doi.org/10.5281/zenodo.11000165 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.11000234 https://doi.org/10.5281/zenodo.11000235 oai:zenodo.org:11000235 http://treatment.plazi.org/id/03C487C5430B737FFCEFFD6E775E9A31 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Revisiting Potter Cove, King George Island, Antarctica, 12 years later: new observations of marine benthic diatoms, pp. 81-103 in Botanica Marina (Warsaw, Poland), 65(2), 94, (2022-02-23) Biodiversity Taxonomy Chromista Ochrophyta Bacillariophyceae Naviculales Pleurosigmataceae Gyrosigma Gyrosigma obscurum info:eu-repo/semantics/other 2022 ftzenodo https://doi.org/10.5281/zenodo.1100023510.1515/bot-2021-006610.5281/zenodo.1100016510.5281/zenodo.11000234 2024-07-25T16:39:58Z Gyrosigma cf. obscurum (W. Smith) Griffith et Henfrey (Figure 81) Literature: (Krammer and Lange-Bertalot 1986, p. 299, fig. 116: 1, 2; Patrick and Reimer 1966, p. 346, pl. 24, fig. 7). Description: Length 144–170 µm, width 9–11 µm, transverse striae 28–30 in 10 µm. Remarks: There has been controversial debate on whether this species belongs to Gyrosigma or Pleurosigma (Reid 2004; Sterrenburg 1993, 2003) based on the angle of striae crossing in the center of the valve. The transverse striae which cross the apical axis at 90° can be easily seen under LM but the oblique striae were very difficult to resolve. According to Reid (2004), molecular analysis supports placing this species in Gyrosigma which is followed here. The observed specimens matched well the description of G. obscurum but as this species is considered freshwater, doubt arose. According to Sterrenburg (2003), marine records of this species were inaccurate. Ecology and distribution: This species appeared in large numbers in Potter Cove but have not been observed in previous collections. Published as part of Al-Handal, Adil Y., Torstensson, Anders & Wulff, Angela, 2022, Revisiting Potter Cove, King George Island, Antarctica, 12 years later: new observations of marine benthic diatoms, pp. 81-103 in Botanica Marina (Warsaw, Poland) (Warsaw, Poland) 65 (2) on page 94, DOI:10.1515/bot-2021-0066, http://zenodo.org/record/11000147 Other/Unknown Material Antarc* Antarctica King George Island Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Chromista Ochrophyta Bacillariophyceae Naviculales Pleurosigmataceae Gyrosigma Gyrosigma obscurum |
spellingShingle |
Biodiversity Taxonomy Chromista Ochrophyta Bacillariophyceae Naviculales Pleurosigmataceae Gyrosigma Gyrosigma obscurum Al-Handal, Adil Y. Torstensson, Anders Wulff, Angela Gyrosigma obscurum Griffith et Henfrey |
topic_facet |
Biodiversity Taxonomy Chromista Ochrophyta Bacillariophyceae Naviculales Pleurosigmataceae Gyrosigma Gyrosigma obscurum |
description |
Gyrosigma cf. obscurum (W. Smith) Griffith et Henfrey (Figure 81) Literature: (Krammer and Lange-Bertalot 1986, p. 299, fig. 116: 1, 2; Patrick and Reimer 1966, p. 346, pl. 24, fig. 7). Description: Length 144–170 µm, width 9–11 µm, transverse striae 28–30 in 10 µm. Remarks: There has been controversial debate on whether this species belongs to Gyrosigma or Pleurosigma (Reid 2004; Sterrenburg 1993, 2003) based on the angle of striae crossing in the center of the valve. The transverse striae which cross the apical axis at 90° can be easily seen under LM but the oblique striae were very difficult to resolve. According to Reid (2004), molecular analysis supports placing this species in Gyrosigma which is followed here. The observed specimens matched well the description of G. obscurum but as this species is considered freshwater, doubt arose. According to Sterrenburg (2003), marine records of this species were inaccurate. Ecology and distribution: This species appeared in large numbers in Potter Cove but have not been observed in previous collections. Published as part of Al-Handal, Adil Y., Torstensson, Anders & Wulff, Angela, 2022, Revisiting Potter Cove, King George Island, Antarctica, 12 years later: new observations of marine benthic diatoms, pp. 81-103 in Botanica Marina (Warsaw, Poland) (Warsaw, Poland) 65 (2) on page 94, DOI:10.1515/bot-2021-0066, http://zenodo.org/record/11000147 |
format |
Other/Unknown Material |
author |
Al-Handal, Adil Y. Torstensson, Anders Wulff, Angela |
author_facet |
Al-Handal, Adil Y. Torstensson, Anders Wulff, Angela |
author_sort |
Al-Handal, Adil Y. |
title |
Gyrosigma obscurum Griffith et Henfrey |
title_short |
Gyrosigma obscurum Griffith et Henfrey |
title_full |
Gyrosigma obscurum Griffith et Henfrey |
title_fullStr |
Gyrosigma obscurum Griffith et Henfrey |
title_full_unstemmed |
Gyrosigma obscurum Griffith et Henfrey |
title_sort |
gyrosigma obscurum griffith et henfrey |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5281/zenodo.11000235 http://treatment.plazi.org/id/03C487C5430B737FFCEFFD6E775E9A31 |
genre |
Antarc* Antarctica King George Island |
genre_facet |
Antarc* Antarctica King George Island |
op_source |
Revisiting Potter Cove, King George Island, Antarctica, 12 years later: new observations of marine benthic diatoms, pp. 81-103 in Botanica Marina (Warsaw, Poland), 65(2), 94, (2022-02-23) |
op_relation |
https://doi.org/10.1515/bot-2021-0066 http://zenodo.org/record/11000147 http://publication.plazi.org/id/FFFDFFBD43067372FFD7FFF973479F53 https://sibils.text-analytics.ch/search/collections/plazi/03C487C5430B737FFCEFFD6E775E9A31 https://www.gbif.org/species/231563597 https://www.checklistbank.org/dataset/297141/taxon/03C487C5430B737FFCEFFD6E775E9A31.taxon https://doi.org/10.5281/zenodo.11000165 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.11000234 https://doi.org/10.5281/zenodo.11000235 oai:zenodo.org:11000235 http://treatment.plazi.org/id/03C487C5430B737FFCEFFD6E775E9A31 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.1100023510.1515/bot-2021-006610.5281/zenodo.1100016510.5281/zenodo.11000234 |
_version_ |
1810489004355747840 |