Redescription and Molecular Characterisation of Gnathia tridens Menzies & Barnard, 1959 (Isopoda: Gnathiidae), a Presumed Ubiquitous Nearshore Isopod from the Temperate Northern Pacific

IF 1.2 3区农林科学 Q4 PARASITOLOGY

Acta Parasitologica Pub Date : 2025-03-27 DOI:10.1007/s11686-025-01005-2

Anja Erasmus, Nico J. Smit, Claire A. Spitzer, Paul C. Sikkel, Niel L. Bruce, Kerry A. Hadfield

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Abstract

Purpose

Gnathia tridens Menzies & Barnard, 1959, is redescribed from material collected from San Diego, California and compared to the original description, as well as material held at the Natural History Museum of Los Angeles County and the Santa Barbara Museum of Natural History.

Materials and Methods

A full redescription is given based on both morphological and molecular characteristics of the male using light and scanning electron microscopy, and COI mtDNA and ITS2 rDNA genes, respectively.

Results

The key distinguishing characters that set G. tridens apart from other congeners are the equally trifid mediofrontal process, the mandible with a large incisor; the mesioventral margin anterior tip dorsally visible; pereonite 4 with distinct visible anterior constriction; and the three proximal tubercles on the antenna articles. Based on the molecular data for COI, the closest congener differs with 122 base pairs.

Conclusion

Together, the combined morphological and molecular characterisation will provide a foundation for future, taxonomic, phylogenetic and biogeographical studies within the genus Gnathia and the Gnathiidae.

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来源期刊

Acta Parasitologica 医学-寄生虫学

CiteScore

3.10

自引率

6.70%

发文量

149

审稿时长

6-12 weeks

期刊介绍： Acta Parasitologica is an international journal covering the latest advances in the subject. Acta Parasitologica publishes original papers on all aspects of parasitology and host-parasite relationships, including the latest discoveries in biochemical and molecular biology of parasites, their physiology, morphology, taxonomy and ecology, as well as original research papers on immunology, pathology, and epidemiology of parasitic diseases in the context of medical, veterinary and biological sciences. The journal also publishes short research notes, invited review articles, book reviews. The journal was founded in 1953 as "Acta Parasitologica Polonica" by the Polish Parasitological Society and since 1954 has been published by W. Stefanski Institute of Parasitology of the Polish Academy of Sciences in Warsaw. Since 1992 in has appeared as Acta Parasitologica in four issues per year.