Integrative Taxonomy of Urocleidoides spp. (Monogenoidea, Dactylogyridae) Parasites of Pseudanos trimaculatus (Characiformes: Anostomidae) from Eastern Amazon, Brazil.

IF 1 4区医学 Q4 PARASITOLOGY

Systematic Parasitology Pub Date : 2024-05-03 DOI:10.1007/s11230-024-10154-3

João F Santos-Neto, Marcus V Domingues

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Abstract

Two new species of Urocleidoides are described from the gills of Pseudanos trimaculatus (Characiformes: Anostomidae) from the coastal drainages of the Eastern Amazon, Brazil. Urocleidoides itabocaensis n. sp. is characterized by having a sclerotized, tubular, sigmoid male copulatory organ (MCO), a circular sclerotized tandem brim associated with the base of the MCO; an accessory piece articulated with the MCO, a V-shaped, divided into two subunits, distal subunit spoon-shaped; and a vaginal pore dextroventral with opening marginal. Urocleidoides omphalocleithrum n. sp. is characterized by presenting a C-shaped or sigmoid MCO; an accessory piece articulated with the MCO, L-shaped, divided into two subunits, distal subunit gutter-shaped; a vaginal pore dextroventral with opening marginal; and a ventral bar broadly V-shaped, with anteromedial projection. Molecular phylogenetic analysis based on partial 28S rDNA and COI mtDNA genes indicate that U. itabocaensis n. sp. and U. omphalocleithrum n. sp. are closely related and appear as a sister group to other Urocleidoides species (U. paradoxus, U. digitabulum and U. sinus) parasitizing anostomid fishes. This study represents the first record of monogenoids from the gills of P. trimaculatus for the Eastern Amazon.

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巴西亚马孙河东部三棘鲷寄生虫 Urocleidoides spp.（Monogenoidea，Dactylogyridae）的综合分类。

本研究从巴西亚马逊河东部沿海流域的三疣梭子蟹（梭形目：Anostomidae）的鳃中描述了两个 Urocleidoides 新种。Urocleidoides itabocaensis n. sp.的特征是有一个硬质化、管状、乙状的雄性交配器官（MCO），一个圆形的硬质化串联帽沿与 MCO 的基部相连；一个附属片与 MCO 相连，呈 V 形，分为两个亚单位，远端亚单位呈匙形；以及一个阴道孔，位于下腹部，开口边缘。Urocleidoides omphalocleithrum n.sp.的特征是具有一个 C 形或乙状的 MCO；一个与 MCO 相连的附件，呈 L 形，分为两个亚单位，远端亚单位呈沟状；一个阴道孔位于外腹部，开口位于边缘；一个腹杆呈宽 V 形，具有前内侧突起。基于部分 28S rDNA 和 COI mtDNA 基因的分子系统学分析表明，U. itabocaensis n. sp.和 U. omphalocleithrum n. sp.亲缘关系密切，与寄生于鳗鲡的其他 Urocleidoides（U. paradoxus、U. digitabulum 和 U. sinus）是姊妹群。这项研究是亚马逊河东部地区首次从三疣梭子蟹的鳃中发现单源体的记录。

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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.