Parasaturnius maurepasi n. gen. et n. comb. (Digena: Bunocotylidae) from the stomach of the silver mullet, Mugil curema (Perciformes: Mugilidae) in coastal lagoons of northern Yucatán, Mexico

IF 1 4区医学 Q4 PARASITOLOGY

Systematic Parasitology Pub Date : 2024-01-22 DOI:10.1007/s11230-023-10142-z

Leopoldo Andrade-Gómez, Gerardo Pérez-Ponce de León

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Abstract

Bunocotylid trematodes represent a group of 149 species with a rather complex taxonomic history. The current concept of the subfamily only includes three genera, Bunocotyle, Saturnius, and Robinia. Specimens of a bunocotylid were collected from the silver mullet, M. curema, from a coastal lagoon of Yucatán and identified as belonging to Saturnius. Further detailed morphological study revealed they corresponded to S. maurepasi, a species previously reported from the stripped mullet, Mugil cephalus in Mississippi, USA. Specimens were sequenced for the LSU of nuclear ribosomal RNA gene (28S) to test their phylogenetic position. We discovered that they do not belong in Saturnius since they nest as an independent lineage which is the sister taxa of a clade formed by Robinia, and Saturnius + Bunocotyle; additionally, the new genus exhibits high genetic divergence (10-12%) with respect to species allocated in the other bunocotylid genera. The species S. maurepasi was then transferred to the new genus as Parasaturnius maurepasi n. gen., n. comb. that was created to accommodate it, and was redescribed based on newly sampled specimens.

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Parasaturnius maurepasi n. gen.

布氏吸虫亚科由 149 个物种组成，分类历史相当复杂。目前，该亚科的概念仅包括三个属：Bunocotyle属、Saturnius属和Robinia属。从尤卡坦半岛沿海泻湖的鲻鱼（M. curema）身上采集到了一种布诺藻类标本，经鉴定属于Saturnius属。进一步的详细形态学研究表明，它们与 S. maurepasi 相符，后者是之前从美国密西西比州的条纹鲻鱼（Mugil cephalus）身上发现的一个物种。对标本进行了核核糖体 RNA 基因（28S）的 LSU 测序，以检验它们的系统发育位置。我们发现，它们不属于Saturnius属，因为它们作为一个独立的品系筑巢，是由洋槐属、Saturnius属和Bunocotyle属组成的一个支系的姊妹类群；此外，相对于分配在其他bunocotylid属中的物种，新属表现出较高的遗传差异（10-12%）。随后，S. maurepasi 这一物种被转入新属 Parasaturnius maurepasi n. gen.

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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.