Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov.
The family Scenedesmaceae is a taxonomically complicated group due to its simple morphology, high phenotypic plasticity, and the presence of cryptic taxa. Over the years several taxonomic revisions, based on molecular data, affected the family. Here, we describe a new scenedesmacean species from Ant...
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crwiley:10.1111/jpy.12355 2024-09-15T17:44:07+00:00 Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov. Sciuto, Katia Lewis, Louise A. Verleyen, Elie Moro, Isabella La Rocca, Nicoletta Graham, L. Università degli Studi di Padova 2015 http://dx.doi.org/10.1111/jpy.12355 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12355 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12355 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Phycology volume 51, issue 6, page 1172-1188 ISSN 0022-3646 1529-8817 journal-article 2015 crwiley https://doi.org/10.1111/jpy.12355 2024-08-09T04:24:30Z The family Scenedesmaceae is a taxonomically complicated group due to its simple morphology, high phenotypic plasticity, and the presence of cryptic taxa. Over the years several taxonomic revisions, based on molecular data, affected the family. Here, we describe a new scenedesmacean species from Antarctica, Chodatodesmus australis , based on phylogenetic analyses of data from nuclear ( ITS 2 spacer, 18S rDNA ), and plastid ( rbc L, tuf A) markers. Morphological ( LM and SEM ) and ultrastructural ( TEM ) observations, carried out both on the holotype of C. australis and on the generitype of Chodatodesmus , allow us to emend the original generic description of this genus. Our molecular and phylogenetic data also reveal the existence of a new monotypic genus, Flechtneria , inside the family Scenedesmaceae and lead to the taxonomic reassignment of some microalgal strains available in International Culture Collections to new taxa. Of the considered genomic regions, the tuf A gene was the easiest to amplify and sequence and it showed the highest phylogenetic signal, even if the number of sequences already available for this marker in the public databases was considerably lower than for the other chosen loci . The rbc L gene also provided good phylogenetic signal, but its amplification and sequencing were generally more problematic. The nuclear markers gave lower phylogenetic signals, but the 18S rDNA allowed distinction at the genus level and the ITS 2 spacer had the advantage that secondary structures could be considered in the analyses. The use of more than one molecular locus is suggested to obtain reliable results in the characterization of scenedesmacean strains. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Journal of Phycology 51 6 1172 1188 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
The family Scenedesmaceae is a taxonomically complicated group due to its simple morphology, high phenotypic plasticity, and the presence of cryptic taxa. Over the years several taxonomic revisions, based on molecular data, affected the family. Here, we describe a new scenedesmacean species from Antarctica, Chodatodesmus australis , based on phylogenetic analyses of data from nuclear ( ITS 2 spacer, 18S rDNA ), and plastid ( rbc L, tuf A) markers. Morphological ( LM and SEM ) and ultrastructural ( TEM ) observations, carried out both on the holotype of C. australis and on the generitype of Chodatodesmus , allow us to emend the original generic description of this genus. Our molecular and phylogenetic data also reveal the existence of a new monotypic genus, Flechtneria , inside the family Scenedesmaceae and lead to the taxonomic reassignment of some microalgal strains available in International Culture Collections to new taxa. Of the considered genomic regions, the tuf A gene was the easiest to amplify and sequence and it showed the highest phylogenetic signal, even if the number of sequences already available for this marker in the public databases was considerably lower than for the other chosen loci . The rbc L gene also provided good phylogenetic signal, but its amplification and sequencing were generally more problematic. The nuclear markers gave lower phylogenetic signals, but the 18S rDNA allowed distinction at the genus level and the ITS 2 spacer had the advantage that secondary structures could be considered in the analyses. The use of more than one molecular locus is suggested to obtain reliable results in the characterization of scenedesmacean strains. |
author2 |
Graham, L. Università degli Studi di Padova |
format |
Article in Journal/Newspaper |
author |
Sciuto, Katia Lewis, Louise A. Verleyen, Elie Moro, Isabella La Rocca, Nicoletta |
spellingShingle |
Sciuto, Katia Lewis, Louise A. Verleyen, Elie Moro, Isabella La Rocca, Nicoletta Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov. |
author_facet |
Sciuto, Katia Lewis, Louise A. Verleyen, Elie Moro, Isabella La Rocca, Nicoletta |
author_sort |
Sciuto, Katia |
title |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_short |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_full |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_fullStr |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_full_unstemmed |
Chodatodesmus australis sp. nov. (Scenedesmaceae, Chlorophyta) from Antarctica, with the emended description of the genus Chodatodesmus, and circumscription of Flechtneria rotunda gen. et sp. nov. |
title_sort |
chodatodesmus australis sp. nov. (scenedesmaceae, chlorophyta) from antarctica, with the emended description of the genus chodatodesmus, and circumscription of flechtneria rotunda gen. et sp. nov. |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/jpy.12355 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12355 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12355 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Journal of Phycology volume 51, issue 6, page 1172-1188 ISSN 0022-3646 1529-8817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jpy.12355 |
container_title |
Journal of Phycology |
container_volume |
51 |
container_issue |
6 |
container_start_page |
1172 |
op_container_end_page |
1188 |
_version_ |
1810491487801049088 |