Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex
A new nontoxic Pseudo‐nitzschia species belonging to the P. pseudodelicatissima complex, P. arctica , was isolated from different areas of the Arctic. The erection of P. arctica is mainly supported by molecular data, since the species shares identical ultrastructure with another species in the compl...
Published in: | Journal of Phycology |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2016
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/jpy.12395 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12395 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12395 |
id |
crwiley:10.1111/jpy.12395 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/jpy.12395 2024-09-15T18:30:32+00:00 Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex Percopo, Isabella Ruggiero, Maria Valeria Balzano, Sergio Gourvil, Priscillia Lundholm, Nina Siano, Raffaele Tammilehto, Anna Vaulot, Daniel Sarno, Diana Mock, T. Ministero dell’Istruzione, dell’Università e della Ricerca 2016 http://dx.doi.org/10.1111/jpy.12395 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12395 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12395 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Phycology volume 52, issue 2, page 184-199 ISSN 0022-3646 1529-8817 journal-article 2016 crwiley https://doi.org/10.1111/jpy.12395 2024-07-09T04:12:45Z A new nontoxic Pseudo‐nitzschia species belonging to the P. pseudodelicatissima complex, P. arctica , was isolated from different areas of the Arctic. The erection of P. arctica is mainly supported by molecular data, since the species shares identical ultrastructure with another species in the complex, P. fryxelliana , and represents a new case of crypticity within the genus. Despite their morphological similarity, the two species are not closely related in phylogenies based on LSU , ITS and rbc L. Interestingly, P. arctica is phylogenetically most closely related to P. granii and P. subcurvata , from which the species is, however, morphologically different. P. granii and P. subcurvata lack the central larger interspace which is one of the defining features of the P. pseudodelicatissima complex. The close genetic relationship between P. arctica and the two species P. granii and P. subcurvata is demonstrated by analysis of the secondary structure of ITS 2 which revealed no compensatory base changes, two hemi‐compensatory base changes, and two deletions in P. arctica with respect to the other two species. These findings emphasize that rates of morphological differentiation, molecular evolution and speciation are often incongruent for Pseudo‐nitzschia species, resulting in a restricted phylogenetic value for taxonomic characters used to discriminate species. The description of a new cryptic species, widely distributed in the Arctic and potentially representing an endemic component of the Arctic diatom flora, reinforces the idea of the existence of noncosmopolitan Pseudo‐nitzschia species and highlights the need for combined morphological and molecular analyses to assess the distributional patterns of phytoplankton species. Article in Journal/Newspaper Phytoplankton Wiley Online Library Journal of Phycology 52 2 184 199 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
A new nontoxic Pseudo‐nitzschia species belonging to the P. pseudodelicatissima complex, P. arctica , was isolated from different areas of the Arctic. The erection of P. arctica is mainly supported by molecular data, since the species shares identical ultrastructure with another species in the complex, P. fryxelliana , and represents a new case of crypticity within the genus. Despite their morphological similarity, the two species are not closely related in phylogenies based on LSU , ITS and rbc L. Interestingly, P. arctica is phylogenetically most closely related to P. granii and P. subcurvata , from which the species is, however, morphologically different. P. granii and P. subcurvata lack the central larger interspace which is one of the defining features of the P. pseudodelicatissima complex. The close genetic relationship between P. arctica and the two species P. granii and P. subcurvata is demonstrated by analysis of the secondary structure of ITS 2 which revealed no compensatory base changes, two hemi‐compensatory base changes, and two deletions in P. arctica with respect to the other two species. These findings emphasize that rates of morphological differentiation, molecular evolution and speciation are often incongruent for Pseudo‐nitzschia species, resulting in a restricted phylogenetic value for taxonomic characters used to discriminate species. The description of a new cryptic species, widely distributed in the Arctic and potentially representing an endemic component of the Arctic diatom flora, reinforces the idea of the existence of noncosmopolitan Pseudo‐nitzschia species and highlights the need for combined morphological and molecular analyses to assess the distributional patterns of phytoplankton species. |
author2 |
Mock, T. Ministero dell’Istruzione, dell’Università e della Ricerca |
format |
Article in Journal/Newspaper |
author |
Percopo, Isabella Ruggiero, Maria Valeria Balzano, Sergio Gourvil, Priscillia Lundholm, Nina Siano, Raffaele Tammilehto, Anna Vaulot, Daniel Sarno, Diana |
spellingShingle |
Percopo, Isabella Ruggiero, Maria Valeria Balzano, Sergio Gourvil, Priscillia Lundholm, Nina Siano, Raffaele Tammilehto, Anna Vaulot, Daniel Sarno, Diana Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex |
author_facet |
Percopo, Isabella Ruggiero, Maria Valeria Balzano, Sergio Gourvil, Priscillia Lundholm, Nina Siano, Raffaele Tammilehto, Anna Vaulot, Daniel Sarno, Diana |
author_sort |
Percopo, Isabella |
title |
Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex |
title_short |
Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex |
title_full |
Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex |
title_fullStr |
Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex |
title_full_unstemmed |
Pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic Pseudo‐nitzschia species within the P. pseudodelicatissima complex |
title_sort |
pseudo‐nitzschia arctica sp. nov., a new cold‐water cryptic pseudo‐nitzschia species within the p. pseudodelicatissima complex |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/jpy.12395 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12395 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12395 |
genre |
Phytoplankton |
genre_facet |
Phytoplankton |
op_source |
Journal of Phycology volume 52, issue 2, page 184-199 ISSN 0022-3646 1529-8817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jpy.12395 |
container_title |
Journal of Phycology |
container_volume |
52 |
container_issue |
2 |
container_start_page |
184 |
op_container_end_page |
199 |
_version_ |
1810472000628457472 |