Revision of the genus Oxyarcturus (Isopoda, Valvifera, Antarcturidae), with a description of a new deep-sea species from Argentina

A new antarcturid isopod, Oxyarcturus holoacanthus sp. nov., is fully described based on seven specimens collected in the Mar del Plata submarine canyon at 2950 m depth, during the "Talud Continental III" expedition on board the Argentinian RV "Puerto Deseado". Oxyarcturus holoac...

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Bibliographic Details
Published in:ChemCatChem
Main Authors: Pereira, Emanuel, Roccatagliata, Daniel, Doti, Brenda L.
Format: Article in Journal/Newspaper
Language:unknown
Published: Pensoft Publishers 2023
Subjects:
Biota
Animalia
Arthropoda
Malacostraca
Isopoda
Valvifera
Antarcturidae
Oxyarcturus
Mar del Plata submarine canyon
Oxyarcturus beliaevi (Kussakin 1967)
Oxyarcturus dubius (Kussakin 1967)
Oxyarcturus holoacanthus sp. nov
Southwest Atlantic
Antarc*
Online Access:https://doi.org/10.3897/zse.99.106667
Description
Summary:A new antarcturid isopod, Oxyarcturus holoacanthus sp. nov., is fully described based on seven specimens collected in the Mar del Plata submarine canyon at 2950 m depth, during the "Talud Continental III" expedition on board the Argentinian RV "Puerto Deseado". Oxyarcturus holoacanthus sp. nov. is closely related to O. spinosus (Beddard, 1886), from which it can be distinguished by the body spine pattern. The penial plate, a novel character for the genus Oxyarcturus, as well as for the family Antarcturidae, is described in detail. The species O. dubius (Kussakin, 1967) and O. beliaevi (Kussakin, 1967) are considered as incertae sedis until further morphological and molecular data can clarify their taxonomic position. An update of the geographic and bathymetric records of the genus Oxyarcturus is provided.

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