Morphological and genetic description of two new species of philometrid nematodes (Philometridae) parasitic in needlefishes (Belonidae) from estuaries of Florida, USA.

IF 1.5 4区医学 Q3 PARASITOLOGY

Folia Parasitologica Pub Date : 2021-04-13 DOI:10.14411/fp.2021.008

Frantisek Moravec, Micah D Bakenhaster, Seifu Seyoum, Michael D Tringali

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引用次数: 7

Abstract

Two new species of philometrid nematodes (Philometridae) from needlefishes (Belonidae) in Florida are described based on morphological and genetic characteristics: Philometra aequispiculata sp. n. (males and females) collected from the ovary of Strongylura marina (Walbaum) (type host) and Strongylura notata (Poey), and Philometra notatae sp. n. (females) from the swimbladder of S. notata. Both species are described and illustrated based on light and scanning electron microscopical examinations. Morphologically, P. aequispiculata sp. n. differs from all congeners mainly in the unique structure of the distal tip of the gubernaculum, whereas P. notatae sp. n. is mainly characterised by the presence of eight markedly large cephalic papillae of the outer circle in gravid and subgravid females, the body length of the gravid female (54 mm) and by the absence of caudal projections. Molecular characterisation of the new species was assessed from phylogenetic analysis of mitochondrial cytochrome c oxidase I (COI) and SSU rRNA small-subunit ribosomal RNA (SSU) sequences among closely related philometrids by way of Bayesian inference. Phylogenetic reconstructions based on COI and SSU sequences show each of the new species comprise discrete ancestor-descendent lineages.

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美国佛罗里达河口针鱼中寄生两新种的形态和遗传描述。

根据形态特征和遗传特征，描述了美国佛罗里达州针鱼(Belonidae)中2个新种:从圆形圆鲈(Walbaum)(型寄主)和圆形圆鲈(Poey)的卵巢中采集到的水蛭线虫(Philometra aequispiculata sp. n.)(雌雄)和从圆形圆鲈(S. notata)的膀胱中采集到的圆形圆鲈(Philometra notatae sp. n.)。这两个物种的描述和说明基于光和扫描电子显微镜检查。在形态学上，aequispiculata sp. n.与所有同系物的区别主要在于网膜远端尖端的独特结构，而P. notatae sp. n.的主要特征是在怀孕和亚怀孕的雌性中存在8个明显较大的头状乳头，怀孕雌性的体长(54毫米)，并且没有尾端突起。通过贝叶斯推断，对亲缘关系较近的philometrids的线粒体细胞色素c氧化酶I (COI)和SSU rRNA小亚基核糖体RNA (SSU)序列进行系统发育分析，评估了新种的分子特征。基于COI和SSU序列的系统发育重建显示，每个新物种都包含离散的祖先-后代谱系。

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来源期刊

Folia Parasitologica 医学-寄生虫学

CiteScore

2.70

自引率

0.00%

发文量

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.