Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes
The previously unknown females of Danielssenia spitsbergensis Gee & Huys, 1994 and males of Mucrosenia kendalli Gee & Huys, 1994 (Pseudotachidiidae, Danielsseniinae) are described based on specimens collected in the Kara and East Siberian Seas. Females of D. spitsbergensis exhibit the main d...
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2021
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ftmagnoliapress:oai:https://mapress.com/oai/:article/44022 2023-05-15T15:19:12+02:00 Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes GARLITSKA, LESYA CHERTOPRUD, ELENA S. 2021-10-12 application/pdf https://www.mapress.com/zt/article/view/zootaxa.5051.1.8 eng eng Mangolia Press https://www.mapress.com/zt/article/view/zootaxa.5051.1.8/45641 https://www.mapress.com/zt/article/view/zootaxa.5051.1.8 Zootaxa; Vol. 5051 No. 1: 12 Oct. 2021; 94-100 1175-5334 1175-5326 10.11646/zootaxa.5051.1 Crustacea Danielssenia spitsbergensis Gee & Huys 1994 Mucrosenia kendalli Gee & Huys 1994 Harpacticoida Pseudotachidiidae Danielsseniinae taxonomy Arctic info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftmagnoliapress https://doi.org/10.11646/zootaxa.5051.1 2021-10-12T17:02:22Z The previously unknown females of Danielssenia spitsbergensis Gee & Huys, 1994 and males of Mucrosenia kendalli Gee & Huys, 1994 (Pseudotachidiidae, Danielsseniinae) are described based on specimens collected in the Kara and East Siberian Seas. Females of D. spitsbergensis exhibit the main diagnostic features of the genus Danielssenia Boeck, 1873 (antennule four-segmented; proximal segment of antennary exopod with one seta; structure of all the mouthparts; absence of an inner seta on exopod-1 of P2–P4; P5 not fused medially and with distinct exopod and baseoendopod, the latter with five setae; genital field with small copulatory pore and short copulatory duct leading to seminal receptacle with paired anterior chambers). At the same time, these specimens also exhibit some distinctive features which are unique for the species but disagree with the generic diagnosis. These peculiarities validate the placing of D. spitsbergensis as species incertae sedis within Danielssenia and point out the necessity of examination of other ‘Danielssenia-like’ forms before the true taxonomic position of this species can be elucidated. Both males and females of M. kendalli exhibit the autapomorphies of the genus, viz. P2 endopod-2 with a mucroniform process reaching almost to end of endopod-3 (this sexually dimorphic character is more pronounced in the males but also present in females); P2 endopod-2 without inner seta; posterior displacement of caudal ramus seta II; presence of tuft of long setules at inner distal corner of caudal ramus; P2 endopod shorter than exopod; P2–P4 exopod-1 without inner seta. Furthermore, some particular features (anal somite and pseudoperculum morphology; female P1 endopod distinctly longer than exopod; P5 exopod with distinct suture on dorsal surface separating it from the baseoendopod; prominent mucroniform process on P2 endopod-2) of the Kara and East Siberian Sea specimens conform fully with the original description of M. kendalli but apparently differ from M. kliei (Smirnov, 1946), the single female of which was collected from the same region and depth. Therefore, the validity and definite status of the specimen described by Smirnov is still a matter of conjecture pending additional findings and, particularly, the discovery of the male. Article in Journal/Newspaper Arctic East Siberian Sea Magnolia press Arctic East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Seta ENVELOPE(9.895,9.895,63.645,63.645) Zootaxa 5051 1 |
institution |
Open Polar |
collection |
Magnolia press |
op_collection_id |
ftmagnoliapress |
language |
English |
topic |
Crustacea Danielssenia spitsbergensis Gee & Huys 1994 Mucrosenia kendalli Gee & Huys 1994 Harpacticoida Pseudotachidiidae Danielsseniinae taxonomy Arctic |
spellingShingle |
Crustacea Danielssenia spitsbergensis Gee & Huys 1994 Mucrosenia kendalli Gee & Huys 1994 Harpacticoida Pseudotachidiidae Danielsseniinae taxonomy Arctic GARLITSKA, LESYA CHERTOPRUD, ELENA S. Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes |
topic_facet |
Crustacea Danielssenia spitsbergensis Gee & Huys 1994 Mucrosenia kendalli Gee & Huys 1994 Harpacticoida Pseudotachidiidae Danielsseniinae taxonomy Arctic |
description |
The previously unknown females of Danielssenia spitsbergensis Gee & Huys, 1994 and males of Mucrosenia kendalli Gee & Huys, 1994 (Pseudotachidiidae, Danielsseniinae) are described based on specimens collected in the Kara and East Siberian Seas. Females of D. spitsbergensis exhibit the main diagnostic features of the genus Danielssenia Boeck, 1873 (antennule four-segmented; proximal segment of antennary exopod with one seta; structure of all the mouthparts; absence of an inner seta on exopod-1 of P2–P4; P5 not fused medially and with distinct exopod and baseoendopod, the latter with five setae; genital field with small copulatory pore and short copulatory duct leading to seminal receptacle with paired anterior chambers). At the same time, these specimens also exhibit some distinctive features which are unique for the species but disagree with the generic diagnosis. These peculiarities validate the placing of D. spitsbergensis as species incertae sedis within Danielssenia and point out the necessity of examination of other ‘Danielssenia-like’ forms before the true taxonomic position of this species can be elucidated. Both males and females of M. kendalli exhibit the autapomorphies of the genus, viz. P2 endopod-2 with a mucroniform process reaching almost to end of endopod-3 (this sexually dimorphic character is more pronounced in the males but also present in females); P2 endopod-2 without inner seta; posterior displacement of caudal ramus seta II; presence of tuft of long setules at inner distal corner of caudal ramus; P2 endopod shorter than exopod; P2–P4 exopod-1 without inner seta. Furthermore, some particular features (anal somite and pseudoperculum morphology; female P1 endopod distinctly longer than exopod; P5 exopod with distinct suture on dorsal surface separating it from the baseoendopod; prominent mucroniform process on P2 endopod-2) of the Kara and East Siberian Sea specimens conform fully with the original description of M. kendalli but apparently differ from M. kliei (Smirnov, 1946), the single female of which was collected from the same region and depth. Therefore, the validity and definite status of the specimen described by Smirnov is still a matter of conjecture pending additional findings and, particularly, the discovery of the male. |
format |
Article in Journal/Newspaper |
author |
GARLITSKA, LESYA CHERTOPRUD, ELENA S. |
author_facet |
GARLITSKA, LESYA CHERTOPRUD, ELENA S. |
author_sort |
GARLITSKA, LESYA |
title |
Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes |
title_short |
Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes |
title_full |
Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes |
title_fullStr |
Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes |
title_full_unstemmed |
Two rare species of Danielsseniinae (Copepoda: Harpacticoida: Pseudotachidiidae) from the Kara and East Siberian Seas, with description of their previously unknown sexes |
title_sort |
two rare species of danielsseniinae (copepoda: harpacticoida: pseudotachidiidae) from the kara and east siberian seas, with description of their previously unknown sexes |
publisher |
Mangolia Press |
publishDate |
2021 |
url |
https://www.mapress.com/zt/article/view/zootaxa.5051.1.8 |
long_lat |
ENVELOPE(166.000,166.000,74.000,74.000) ENVELOPE(9.895,9.895,63.645,63.645) |
geographic |
Arctic East Siberian Sea Seta |
geographic_facet |
Arctic East Siberian Sea Seta |
genre |
Arctic East Siberian Sea |
genre_facet |
Arctic East Siberian Sea |
op_source |
Zootaxa; Vol. 5051 No. 1: 12 Oct. 2021; 94-100 1175-5334 1175-5326 10.11646/zootaxa.5051.1 |
op_relation |
https://www.mapress.com/zt/article/view/zootaxa.5051.1.8/45641 https://www.mapress.com/zt/article/view/zootaxa.5051.1.8 |
op_doi |
https://doi.org/10.11646/zootaxa.5051.1 |
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Zootaxa |
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5051 |
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1 |
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1766349378360967168 |