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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引用次数: 0

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.

查看原文本刊更多论文

Menzies & Barnard, 1959（等足目：Gnathia tridens），一种推测普遍存在于温带北太平洋近岸的等足目动物

目的：三叉戟藓；Barnard, 1959，根据从加利福尼亚圣地亚哥收集的资料进行了重新描述，并与原始描述以及洛杉矶县自然历史博物馆和圣巴巴拉自然历史博物馆保存的资料进行了比较。材料与方法利用光镜和扫描电镜对雄性的形态和分子特征以及COI mtDNA和ITS2 rDNA基因进行了全面的重新描述。结果三叉戟与其他同类的主要区别特征是同样三叉戟的中额突、大门牙的下颌骨；中腹侧缘前尖端背面可见；Pereonite 4具明显可见的前缩；还有天线上的三个近端结节。根据COI的分子数据，最接近的同源物相差122个碱基对。结论本研究为Gnathia属和Gnathiidae的分类、系统发育和生物地理学研究奠定了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.