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Peer-reviewedCC BY 4.0ZooKeys

Marine tardigrades (Heterotardigrada) from Senghor Seamount, Eastern Tropical Atlantic, with the description of two new species from the taxon Stygarctidae

  • Roman Ruslanovych Trokhymchuk1,2
  • Jesper Guldberg Hansen3
  • Uliana Pysarenko4
  • Kateryna Subota4
  • Alexander Kieneke2
4 affiliations
  1. 1Naturalis Biodiversity Center, Darwinweg 2, 2333 CR, Leiden, Netherlands Naturalis Biodiversity Center Leiden Netherlands https://ror.org/0566bfb96
  2. 2German Centre for Marine Biodiversity Research, Senckenberg am Meer, Südstrand 44, 26382, Wilhelmshaven, Germany German Centre for Marine Biodiversity Research, Senckenberg am Meer Wilhelmshaven Germany https://ror.org/03sd3yf61
  3. 3Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, 2100, Copenhagen, Denmark Natural History Museum of Denmark, University of Copenhagen Copenhagen Denmark https://ror.org/035b05819
  4. 4V.N. Karazin Kharkiv National University, Svobody Square 4, 61022, Kharkiv, Ukraine V.N. Karazin Kharkiv National University Kharkiv Ukraine
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Abstract

The Atlantic Ocean’s seamounts are known for their high diversity of meiofauna. In this study an overview of the marine tardigrade fauna on the yet not studied Senghor Seamount is presented. The materials were collected during the M79/3 cruise of R/V Meteor in the Cabo Verde (Cape Verde) region from Senghor Seamount and a deep-sea reference site. Samples from the seamount yielded 20 taxa: three determined species (Chrysoarctus briandi, Quisarctus armatus, Raiarctus colurus), 15 other taxa (Angursa sp., Batillipes sp., Halechiniscidae sp., Halechiniscidae gen. A sp. A, Chrysoarctus sp., Dipodarctus aff. subterraneus, Dipodarctus sp., Florarctinae sp., Halechiniscus cf. perfectus, Halechiniscus sp., Styraconyxidae sp., Raiarctus aff. variabilis, Raiarctus sp., Tanarctus sp., Tholoarctus cf. natans natans), and two new species, for which we provide morphological descriptions: Megastygarctides hekataesp. nov. with rare genital spines; and Parastygarctus poterchasp. nov. with a paedomorphic appearance. In contrast, the deep-sea reference station is represented only by two taxa (Angursa abyssalis and Angursa sp.). This observation supports the hypothesis of seamounts as hotspot habitats for marine tardigrades.

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Cite

BibTeXRIS
BibTeX
@article{trokhymchuk2026marine,
  title = {{Marine tardigrades (Heterotardigrada) from Senghor Seamount, Eastern Tropical Atlantic, with the description of two new species from the taxon Stygarctidae}},
  author = {Roman Ruslanovych Trokhymchuk and Jesper Guldberg Hansen and Uliana Pysarenko and Kateryna Subota and Alexander Kieneke},
  journal = {ZooKeys},
  year = {2026},
  month = oct,
  doi = {10.3897/zookeys.1295.205902},
  url = {https://doi.org/10.3897/zookeys.1295.205902},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Marine tardigrades (Heterotardigrada) from Senghor Seamount, Eastern Tropical Atlantic, with the description of two new species from the taxon Stygarctidae
AU  - Roman Ruslanovych Trokhymchuk
AU  - Jesper Guldberg Hansen
AU  - Uliana Pysarenko
AU  - Kateryna Subota
AU  - Alexander Kieneke
PY  - 2026
DA  - 2026/10/27
JO  - ZooKeys
DO  - 10.3897/zookeys.1295.205902
UR  - https://doi.org/10.3897/zookeys.1295.205902
AB  - The Atlantic Ocean’s seamounts are known for their high diversity of meiofauna. In this study an overview of the marine tardigrade fauna on the yet not studied Senghor Seamount is presented. The materials were collected during the M79/3 cruise of R/V Meteor in the Cabo Verde (Cape Verde) region from Senghor Seamount and a deep-sea reference site. Samples from the seamount yielded 20 taxa: three determined species (Chrysoarctus briandi, Quisarctus armatus, Raiarctus colurus), 15 other taxa (Angursa sp., Batillipes sp., Halechiniscidae sp., Halechiniscidae gen. A sp. A, Chrysoarctus sp., Dipodarctus aff. subterraneus, Dipodarctus sp., Florarctinae sp., Halechiniscus cf. perfectus, Halechiniscus sp., Styraconyxidae sp., Raiarctus aff. variabilis, Raiarctus sp., Tanarctus sp., Tholoarctus cf. natans natans), and two new species, for which we provide morphological descriptions: Megastygarctides hekataesp. nov. with rare genital spines; and Parastygarctus poterchasp. nov. with a paedomorphic appearance. In contrast, the deep-sea reference station is represented only by two taxa (Angursa abyssalis and Angursa sp.). This observation supports the hypothesis of seamounts as hotspot habitats for marine tardigrades.
SN  - 1313-2989
SN  - 1313-2970
ER  -