Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora)
To date, a total of 23 valid species of heteronemerteans belonging to 15 genera have been recorded in Antarctic and Subantarctic waters. The ribbon worm Heteronemertes longifissa (Hubrecht, 1887) is the only heteronemertean species reported to have bipolar distribution, but this statement is doubtfu...
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ftmdpi:oai:mdpi.com:/2073-4441/15/4/809/ 2023-08-20T04:02:26+02:00 Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora) Alexei V. Chernyshev Neonila E. Polyakova agris 2023-02-19 application/pdf https://doi.org/10.3390/w15040809 EN eng Multidisciplinary Digital Publishing Institute Oceans and Coastal Zones https://dx.doi.org/10.3390/w15040809 https://creativecommons.org/licenses/by/4.0/ Water; Volume 15; Issue 4; Pages: 809 benthos nemerteans larvae bipolar distribution Text 2023 ftmdpi https://doi.org/10.3390/w15040809 2023-08-01T08:53:08Z To date, a total of 23 valid species of heteronemerteans belonging to 15 genera have been recorded in Antarctic and Subantarctic waters. The ribbon worm Heteronemertes longifissa (Hubrecht, 1887) is the only heteronemertean species reported to have bipolar distribution, but this statement is doubtful. The phylogenetic relationships of H. longifissa to other heteronemerteans remain uncertain. A genetic analysis of specimens from Antarctica has shown that the name H. longifissa refers to two sibling species with an uncorrected p-distance of 5.3% in COI. These species differ in body color: one is whitish, and the other is grayish-pink. The species with the whitish body has been reliably identified from off the Norway coast (as Cerebratulus sp. NemBar1383 (BOLD: ACM5920)), i.e., it has a bipolar distribution. A molecular phylogenetic analysis of Lineidae based on five gene markers (COI, 16S, 18S, 28S, and histone H3) has shown the genus Heteronemertes to belong to Lineage D of Clade 2 sensu Kajihara et al., 2022 (crown Lineidae). The phylogenetic positions of four more species of unidentified lineids are currently under discussion. Text Antarc* Antarctic Antarctica MDPI Open Access Publishing Antarctic Norway The Antarctic Water 15 4 809 |
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benthos nemerteans larvae bipolar distribution |
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benthos nemerteans larvae bipolar distribution Alexei V. Chernyshev Neonila E. Polyakova Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora) |
topic_facet |
benthos nemerteans larvae bipolar distribution |
description |
To date, a total of 23 valid species of heteronemerteans belonging to 15 genera have been recorded in Antarctic and Subantarctic waters. The ribbon worm Heteronemertes longifissa (Hubrecht, 1887) is the only heteronemertean species reported to have bipolar distribution, but this statement is doubtful. The phylogenetic relationships of H. longifissa to other heteronemerteans remain uncertain. A genetic analysis of specimens from Antarctica has shown that the name H. longifissa refers to two sibling species with an uncorrected p-distance of 5.3% in COI. These species differ in body color: one is whitish, and the other is grayish-pink. The species with the whitish body has been reliably identified from off the Norway coast (as Cerebratulus sp. NemBar1383 (BOLD: ACM5920)), i.e., it has a bipolar distribution. A molecular phylogenetic analysis of Lineidae based on five gene markers (COI, 16S, 18S, 28S, and histone H3) has shown the genus Heteronemertes to belong to Lineage D of Clade 2 sensu Kajihara et al., 2022 (crown Lineidae). The phylogenetic positions of four more species of unidentified lineids are currently under discussion. |
format |
Text |
author |
Alexei V. Chernyshev Neonila E. Polyakova |
author_facet |
Alexei V. Chernyshev Neonila E. Polyakova |
author_sort |
Alexei V. Chernyshev |
title |
Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora) |
title_short |
Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora) |
title_full |
Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora) |
title_fullStr |
Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora) |
title_full_unstemmed |
Distribution and Phylogenetic Position of the Antarctic Ribbon Worm Heteronemertes longifissa (Nemertea, Pilidiophora) |
title_sort |
distribution and phylogenetic position of the antarctic ribbon worm heteronemertes longifissa (nemertea, pilidiophora) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/w15040809 |
op_coverage |
agris |
geographic |
Antarctic Norway The Antarctic |
geographic_facet |
Antarctic Norway The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Water; Volume 15; Issue 4; Pages: 809 |
op_relation |
Oceans and Coastal Zones https://dx.doi.org/10.3390/w15040809 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w15040809 |
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Water |
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15 |
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4 |
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809 |
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1774712894981668864 |