Proposal of two new genera of the family Zosimeidae Seifried (Copepoda: Harpacticoida): Heterozosime gen. nov. and Acritozosime gen. nov.

  • In the Pacific Ocean, the taxonomy of the family Zosimeidae Seifried, 2003 is poorly understood and to date only five species of the genus Zosime Boeck, 1873 are known. During oceanographic cruises exploring the species diversity of harpacticoids, two undescribed zosimeid copepods were sampled from shallow Korean waters and the deep northwestern Pacific. A detailed morphological examination has led us to propose two new genera, Heterozosime gen. nov. for the Korean zosimeid H. tenuis gen. et sp. nov. and Acritozosime gen. nov. for the deep-sea zosimeid A. spinesco gen. et sp. nov. Both new genera exhibit a distinctive feature in that the first thoracic leg has a two-segmented exopod, in contrast to the three-segmented exopod of this leg in all known zosimeid genera. Furthermore, Acritozosime gen. nov. can also be discriminated from other genera by the two-segmented endopod in second to fourth thoracic legs and the reduced setal armatures of the second exopodal segment of antenna, the first endopodal segment of first to third thoracic legs and the third exopodal segment in second to fourth thoracic legs. A comparison of the fundamental structures of appendages suggests that A. spinesco gen. et sp. nov. experienced a unique evolutionary history within the Zosimeidae.

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Metadaten
Author:Jong Guk Kim, Jimin Lee
URN:urn:nbn:de:hebis:30:3-614863
DOI:https://doi.org/10.5852/ejt.2021.760.1439
ISSN:2118-9773
Parent Title (German):European journal of taxonomy
Series (Serial Number):European journal of taxonomy : EJT (760:32-60)
Publisher:Muséum National d'Histoire Naturelle
Place of publication:Paris
Document Type:Article
Language:English
Date of Publication (online):2021/07/19
Date of first Publication:2021/07/19
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2021/07/19
Tag:Korea; Pacific; deep sea; meiofauna; morphology
Volume:2021
Issue:760
Page Number:29
First Page:32
Last Page:60
HeBIS-PPN:484951572
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 590 Tiere (Zoologie)
Sammlungen:Sammlung Biologie / Sondersammelgebiets-Volltexte
Journal:urn:nbn:de:hebis:30:3-257882
Licence (German):License LogoCreative Commons - Namensnennung 4.0