在系统发育上相距甚远的粘虫属(Myxidium 和 Paramyxidium)在欧洲鳗鱼肾脏中的惊人形态相似性和组织滋养性证据:欧洲鳗鲡肾脏中的Myxidium和Paramyxidium。

IF 1.5 4区 医学 Q3 PARASITOLOGY Folia Parasitologica Pub Date : 2024-07-29 DOI:10.14411/fp.2024.013
Martina Lisnerova, Pavla Bartosova-Sojkova, Alena Lovy, Petr Blabolil, Ivan Fiala
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引用次数: 0

摘要

欧洲鳗鲡(林尼厄斯)(Elopomorpha: Anguilliformes)是一种极度濒危的鱼类,具有重要的生态和经济价值,寄生着许多寄生虫,其中包括粘孢子虫(Cnidaria)。Myxidium giardi Cépède, 1906 年在欧洲鳗鱼的肾脏中首次被发现以来,已从多个鳗鲡物种的不同组织中发现了许多孢子的大小和形状。形态上的多变性、广泛的宿主和组织谱系以及序列数据的缺乏使人们对所报道的分离物的同种性产生了怀疑。随后的研究提供了来自鳗鲡和其他麋鹿形鱼类的几个分离物的 18S rDNA 序列,并证明寄生虫数据分为两个不同的系统发育系,一个包括 M. giardi 序列,另一个是感染麋鹿形鱼类的所有物种,归入最近建立的 Paramyxidium 属 Freeman et Kristmundsson,2018。然而,Myxidium giardi 被转入该属,成为 Paramyxidium giardi n. comb.,并被指定为该属的模式种。giardi 的序列被认为与该种有误。为了揭示最初由 Cépède(1906 年)描述的 M. giardi 的地位,我们对来自捷克不同生境的 24 条欧洲鳗鱼的各种器官进行了显微镜和分子检测。通过形态计量学和分子分析,我们证明欧洲鳗肾寄生虫分离物的孢子和极囊形态、形态计量学和组织滋养性与最初描述的 M. giardi 的特征相符。我们分离到的寄生虫属于包含首次公布的吉尔达氏寄生虫序列的一系。因此,最初描述的 M. giardi 确实是 Myxidium Bütschli, 1882 属中的一个现存种,我们正式恢复并重新描述了该种。由于 M. giardi 与 Freeman et Kristmundsson(2018)的 P. giardi 在形态学和分子学上的差异,我们另外将后者重新命名为 Paramyxidium freemani nom.
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Evidence of striking morphological similarity and tissue tropism of phylogenetically distant myxozoan genera: Myxidium and Paramyxidium in the kidney of the European eel.

European eel, Anguilla anguilla (Linnaeus) (Elopomorpha: Anguilliformes), is a critically endangered fish of ecological and economic importance, hosting numerous parasites, including myxozoans (Cnidaria). Since its initial discovery in the kidney of European eel, Myxidium giardi Cépède, 1906 has been reported with numerous spore sizes and shapes from various tissues of multiple anguillid species. Morphological variability, wide host and tissue spectrum, and lack of sequence data raised doubts about the conspecificity of reported isolates. Subsequent studies provided 18S rDNA sequences of several isolates from anguillids and other elopiform fish, and demonstrated a split of parasite data into two distinct phylogenetic lineages, one comprising the M. giardi sequence, and the other all species infecting elopiform fishes classified under the recently established genus Paramyxidium Freeman et Kristmundsson, 2018. Myxidium giardi was, however, transferred to this genus as Paramyxidium giardi n. comb. and designated as the type species of the genus. In line with this change, the sequence originally identified as M. giardi was considered to have been incorrectly associated with this species. To shed light on the status of M. giardi originally described by Cépède (1906), we conducted microscopic and molecular examinations of various organs of 24 individuals of European eel, originating from diverse Czech habitats. Through morphometric and molecular analyses, we demonstrated that spore and polar capsule morphology, morphometry and tissue tropism of our European eel kidney parasite isolates matched the features of the original M. giardi description. Our isolates clustered in the lineage encompassing the first published M. giardi sequence. Thus, the originally described M. giardi indeed represents an existing species within the genus Myxidium Bütschli, 1882, which we formally resurrect and redescribe. Due to the morphological and molecular differences between M. giardi and P. giardi of Freeman et Kristmundsson (2018), we additionally rename the latter species as Paramyxidium freemani nom. nov.

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来源期刊
Folia Parasitologica
Folia Parasitologica 医学-寄生虫学
CiteScore
2.70
自引率
0.00%
发文量
25
审稿时长
>12 weeks
期刊介绍: FOLIA PARASITOLOGICA, issued in online versions, is an international journal that covers the whole field of general, systematic, ecological and experimental parasitology. It publishes original research papers, research notes and review articles. Contributions from all branches of animal parasitology, such as morphology, taxonomy, biology, biochemistry, physiology, immunology, molecular biology and evolution of parasites, and host-parasite relationships, are eligible. Novelty and importance in the international (not local or regional) context are required. New geographical records of parasites, records of new hosts, regional parasite and/or host surveys (if they constitute the principal substance of manuscript), local/regional prevalence surveys of diseases, local/regional studies on epidemiology of well known diseases and of parasite impact on human/animal health, case reports, routine clinical studies and testing of established diagnostic or treatment procedures, will not be considered. One species description will also not be considered unless they include more general information, such as new diagnostic characters, host-parasite associations, phylogenetic implications, etc. Manuscripts found suitable on submission will be reviewed by at least two reviewers.
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