Cochimibdella mexicana n. gen. n. sp. (Hirudinida: Piscicolidae), from Octopus bimaculatus Verrill (Cephalopoda: Octopodidae) in the Gulf of California, Mexico.

IF 1.2 4区医学 Q4 PARASITOLOGY Systematic Parasitology Pub Date : 2025-02-16 DOI:10.1007/s11230-025-10217-z

Fernando Ruiz-Escobar, Graciela E Colunga-Ramírez, Alejandro Oceguera-Figueroa, Sheila Castellanos-Martínez

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Abstract

Cochimibdella mexicana n. gen. n. sp. is described based on morphological data and comparative analysis of DNA sequences, including two mitochondrial (cytochrome oxidase subunit I and 12s rRNA) and nuclear (18S rRNA and 28S rRNA) loci. Leech specimens were found in the mantle cavity and external surface of the octopus Octopus bimaculatus from Bahía de los Ángeles, Baja California, México. In vivo observations of recently hatched leeches in the laboratory confirm a broad prey range, including fishes, the most common hosts of the family species. The new taxon differs from species of the family Piscicolidae in possession of weakly developed tubercles in a3 of the urosome. In addition, molecular analysis places Cochimibdella mexicana n. gen. n. sp. sister to Austrobdella californiana and Myzobdella lugubris. This work amends a previous record of the elasmobranch-feeding leech Pontobdella (=Stibarobdella) moorei as a parasite of Octopus bimaculatus from the type locality of the new taxon.

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墨西哥章鱼（Cochimibdella mexicana n. gen. n. sp.）（水蛭纲：章鱼科），产自墨西哥加利福尼亚湾的双爪章鱼（头足纲：章鱼科）。

根据形态学资料和DNA序列的比较分析，对墨西哥Cochimibdella mexicana n. gen. n. sp.进行了描述，包括两个线粒体（细胞色素氧化酶亚基I和12s rRNA）和细胞核（18S rRNA和28S rRNA）位点。在墨西哥墨西哥下加利福尼亚州Bahía de los Ángeles的章鱼（octopus bimaculatus）的地幔腔和外表面发现了水蛭标本。在实验室对最近孵化的水蛭进行的体内观察证实了其广泛的猎物范围，包括鱼类，这是该家族物种最常见的宿主。该新分类群与鱼尾鱼科的不同之处在于其在泌尿体的a3处具有发育较弱的结节。此外，分子分析表明墨西哥Cochimibdella mexicana n. gen. n. sp.是Austrobdella californiana和Myzobdella lugubris的姐妹。本研究从新分类单元的类型定位上修正了以往关于食鳃水蛭Pontobdella (=Stibarobdella) moorei为双斑章鱼寄生的记录。

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来源期刊

Systematic Parasitology 医学-寄生虫学

CiteScore

2.20

自引率

23.10%

发文量

审稿时长

6-12 weeks

期刊介绍： Systematic Parasitology publishes papers on the systematics, taxonomy and nomenclature of the following groups: Nematoda (including plant-parasitic), Monogenea, Digenea, Cestoda, Acanthocephala, Aspidogastrea, Cestodaria, Arthropoda (parasitic copepods, hymenopterans, mites, ticks, etc.), Protozoa (parasitic groups), and parasitic genera in other groups, such as Mollusca, Turbelleria, etc. Systematic Parasitology publishes fully illustrated research papers, brief communications, and fully illustrated major revisions. In order to maintain high standards, all contributors describing new taxa are asked to state clearly where the holotype is deposited and to make paratypes available for examination by the referees. It is recognized that, in some cases, this may cause problems for the authors, but it is hoped that by adhering to this rule authors may be protected against rapid synonymy of their taxa, and the types will be preserved for posterity.