Mantoniella beaufortii and Mantoniella baffinensis sp. nov. (Mamiellales, Mamiellophyceae), two new green algal species from the high arctic1
15 pages, 7 figures, 3 tables, supporting information https://doi.org/10.1111/jpy.12932 Members of the class Mamiellophyceae comprise species that can dominate picophytoplankton diversity in polar waters. Yet, polar species are often morphologically indistinguishable from temperate species, although...
Main Authors: | , , , , , , , , |
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Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
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Phycological Society of America
2020
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Subjects: | |
Online Access: | http://hdl.handle.net/10261/201817 https://doi.org/10.1111/jpy.12932 https://doi.org/10.13039/501100011697 https://doi.org/10.13039/501100001665 https://doi.org/10.13039/501100011033 |
Summary: | 15 pages, 7 figures, 3 tables, supporting information https://doi.org/10.1111/jpy.12932 Members of the class Mamiellophyceae comprise species that can dominate picophytoplankton diversity in polar waters. Yet, polar species are often morphologically indistinguishable from temperate species, although clearly separated by molecular features. Here we examine four Mamiellophyceae strains from the Canadian Arctic. The 18S rRNA and Internal Transcribed Spacer 2 (ITS2) gene phylogeny place these strains within the family Mamiellaceae (Mamiellales, Mamiellophyceae) in two separate clades of the genus Mantoniella. ITS2 synapomorphies support their placement as two new species, Mantoniella beaufortii and Mantoniella baffinensis. Both species have round green cells with diameter between 3 and 5 μm, one long flagellum and a short flagellum (~1 μm) and are covered by spiderweb-like scales, making both species similar to other Mantoniella species. Morphologically, M. beaufortii and M. baffinensis are most similar to the cosmopolitan M. squamata with only minor differences in scale structure distinguishing them. Screening of global marine metabarcoding data sets indicates M. beaufortii has only been recorded in seawater and sea ice samples from the Arctic, while no environmental barcode matches M. baffinensis. Like other Mamiellophyceae genera that have distinct polar and temperate species, the polar distribution of these new species suggests they are cold or ice-adapted Mantoniella species Financial support for this work was provided by the following projects: ANR PhytoPol (ANR‐15‐CE02‐0007) and Green Edge (ANR‐14‐CE01‐0017‐03), ArcPhyt (Région Bretagne), TaxMArc (Research Council of Norway, 268286/E40) With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI) |
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