The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New Species
During expedition EMB-238 of RV EM BORGESE to the Fehmarn Belt (Baltic Sea, Germany) in 2020, specimens of a new species of the Rhizothrichidae Por (Crustacea, Copepoda, Harpacticoida) were found. Currently, Rhizothrichidae enclose two genera: <i>Rhizothrix</i> Sars and <i>Tryphoem...
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| Format: | Article |
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MDPI AG
2023-12-01
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| Series: | Taxonomy |
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| Online Access: | https://www.mdpi.com/2673-6500/3/4/30 |
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| author | Kai Horst George Andreina Zey Jana Packmor |
| author_facet | Kai Horst George Andreina Zey Jana Packmor |
| author_sort | Kai Horst George |
| collection | DOAJ |
| description | During expedition EMB-238 of RV EM BORGESE to the Fehmarn Belt (Baltic Sea, Germany) in 2020, specimens of a new species of the Rhizothrichidae Por (Crustacea, Copepoda, Harpacticoida) were found. Currently, Rhizothrichidae enclose two genera: <i>Rhizothrix</i> Sars and <i>Tryphoema</i> Monard. The assignment of the new species is based on the following commonly derived characters: the formation of a strong spinulose (sub)apical element on the last segment of the female A1, and the formation of a long brush seta on the last exopodal and endopodal segments of the P1. The new species could not be assigned to either <i>Rhizothrix</i> or <i>Tryphoema</i> because it lacks their autapomorphies but presents exclusive derived characters, including the absence of the abexopodal seta on the A2 allobasis, the possession of only one seta on the endopods of P2–P4, and the fusion of the female P5 exopod and baseoendopod. Therefore, it is assigned to a new genus. Besides the species description, its phylogenetic position in the Rhizothrichidae as well as its possible relationship with <i>Rhizothrix</i> and <i>Tryphoema</i> are discussed. Furthermore, the affiliation of the Rhizothrichidae with the Cletodoidea is justified on the basis of 17 apomorphies. A key to the rhizothrichid genera is provided. |
| first_indexed | 2024-03-08T20:19:33Z |
| format | Article |
| id | doaj.art-e52845e7cc75442bb08d7c683055009f |
| institution | Directory Open Access Journal |
| issn | 2673-6500 |
| language | English |
| last_indexed | 2024-03-08T20:19:33Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Taxonomy |
| spelling | doaj.art-e52845e7cc75442bb08d7c683055009f2023-12-22T14:45:33ZengMDPI AGTaxonomy2673-65002023-12-013452855010.3390/taxonomy3040030The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New SpeciesKai Horst George0Andreina Zey1Jana Packmor2German Centre for Marine Biodiversity Research DZMB, Senckenberg am Meer, Südstrand 44, 26382 Wilhelmshaven, GermanyDepartment of Biology, Faculty of Mathematics and Natural Sciences, Biozentrum Köln, University of Cologne, Zülpicher Straße 47b, 50674 Cologne, GermanyGerman Centre for Marine Biodiversity Research DZMB, Senckenberg am Meer, Südstrand 44, 26382 Wilhelmshaven, GermanyDuring expedition EMB-238 of RV EM BORGESE to the Fehmarn Belt (Baltic Sea, Germany) in 2020, specimens of a new species of the Rhizothrichidae Por (Crustacea, Copepoda, Harpacticoida) were found. Currently, Rhizothrichidae enclose two genera: <i>Rhizothrix</i> Sars and <i>Tryphoema</i> Monard. The assignment of the new species is based on the following commonly derived characters: the formation of a strong spinulose (sub)apical element on the last segment of the female A1, and the formation of a long brush seta on the last exopodal and endopodal segments of the P1. The new species could not be assigned to either <i>Rhizothrix</i> or <i>Tryphoema</i> because it lacks their autapomorphies but presents exclusive derived characters, including the absence of the abexopodal seta on the A2 allobasis, the possession of only one seta on the endopods of P2–P4, and the fusion of the female P5 exopod and baseoendopod. Therefore, it is assigned to a new genus. Besides the species description, its phylogenetic position in the Rhizothrichidae as well as its possible relationship with <i>Rhizothrix</i> and <i>Tryphoema</i> are discussed. Furthermore, the affiliation of the Rhizothrichidae with the Cletodoidea is justified on the basis of 17 apomorphies. A key to the rhizothrichid genera is provided.https://www.mdpi.com/2673-6500/3/4/30meiofaunaMGF-Ostseemobile bottom trawlingphylogeny |
| spellingShingle | Kai Horst George Andreina Zey Jana Packmor The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New Species Taxonomy meiofauna MGF-Ostsee mobile bottom trawling phylogeny |
| title | The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New Species |
| title_full | The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New Species |
| title_fullStr | The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New Species |
| title_full_unstemmed | The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New Species |
| title_short | The Relationship between the Rhizothrichidae Por (Copepoda: Harpacticoida) and the Cletodoidea Bowman & Abele, Including the Establishment of a New Genus and the Description of a New Species |
| title_sort | relationship between the rhizothrichidae por copepoda harpacticoida and the cletodoidea bowman abele including the establishment of a new genus and the description of a new species |
| topic | meiofauna MGF-Ostsee mobile bottom trawling phylogeny |
| url | https://www.mdpi.com/2673-6500/3/4/30 |
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