Henneguya (Cnidaria: Myxobolidae) species infecting Oligosarcus jenynsii (Characiformes: Characidae) in a Neotropical shallow lake from Argentina: morphological and molecular characterisation.

IF 1.5 4区 医学 Q3 PARASITOLOGY
Maria Alejandra Rossin, Delfina Maria Paula Cantatore, Martina Lisnerova, Veronica Taglioretti, Astrid Sibylle Holzer
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引用次数: 0

Abstract

Two previously undescribed myxozoan species, Henneguya sardellae sp. n. and H. margaritae sp. n., found infecting connective tissues of the Neotropical characid fish Oligosarcus jenynsii (Günther) from Argentina are morphologically and molecularly characterised. Mature spores of H. sardellae sp. n. are ellipsoid, with two, straight and visibly fused caudal appendages cleaved at its blunt terminal end; measuring 33.5 ± 1.2 (30.9-35.5) μm in total length, spore body 17.5 ± 0.6 (16.3-18.6) µm, 7.8 ± 0.4 (7.0-8.8) µm wide and 6.9 ± 0.2 (6.6-7.2) µm thick, with two elongated, unequally-sized polar capsules situated at anterior end, and 11-13 turns of polar tubules. Mature spores of H. margaritae sp. n. are pyriform, with two caudal appendages visible fused together and much longer than spore body, with unequal endings; measuring 35.9 ± 2.8 (29.2-40.7) µm in total length, spore body 11.5 ± 0.9 (9.2-13.0) µm long, 5.8 ± 0.4 (5.1-6.7) µm wide and 5.5 ± 0.2 (5.1-5.8) µm thick, with two polar capsules similar in size, pyriform polar capsules containing polar tubules with 4-5 coils. Both species showed a membraneous sheath surrounding the spore body and caudal appendages; in H. sardellae sp. n. this feature can deploy laterally. Phylogenetic analyses based on SSU rDNA sequences showed that H. sardellae sp. n. and H. margaritae sp. n. clustered with other myxobolids parasitising Characiformes in Brazil, Cichliformes in Mexico and Cyprinodontiformes in Mexico and the United States. The description of these two new species of Henneguya as the first described species of the genus that parasitise freshwater fish in Argentina highlights the importance of further research on the diversity and distribution of myxozoans in this region.

阿根廷一个新热带浅湖中感染 Oligosarcus jenynsii(鳞栉目:鳞栉科)的 Henneguya(线虫纲:线虫科)物种:形态学和分子特征。
n. 和 H. margaritae sp. n. 从形态学和分子学上描述了在阿根廷发现的感染新热带鳉鱼 Oligosarcus jenynsii (Günther) 结缔组织的两个以前未描述过的肌孢子虫物种 Henneguya sardellae sp.H. sardellae sp. n.的成熟孢子呈椭圆形,有两个直而明显融合的尾部附属物,在其钝的末端开裂;全长 33.5 ± 1.2 (30.9-35.5) μm,孢子体 17.5 ± 0.6 (16.3-18.6) μm,宽 7.8 ± 0.4 (7.0-8.8) μm,厚 6.9 ± 0.2 (6.6-7.2) μm,前端有两个拉长、大小不等的极囊,极管有 11-13 圈。H. margaritae sp. n.的成熟孢子呈梨形,可见两个尾部附属物融合在一起,比孢子体长很多,末端不等长;全长 35.9 ± 2.8 (29.2-40.7) µm,孢子体 11.5 ± 0.9(9.2-13.0)微米长,5.8 ± 0.4(5.1-6.7)微米宽,5.5 ± 0.2(5.1-5.8)微米厚,有两个大小相似的极囊,梨形极囊包含有 4-5 个线圈的极管。这两个物种的孢子体和尾部附属物周围都有一层膜鞘;在沙丁鱼属中,这一特征可以向侧面展开。基于 SSU rDNA 序列的系统发生学分析表明,H. sardellae sp.这两个 Henneguya 新种是首次描述的寄生于阿根廷淡水鱼类的 Henneguya 属物种,它们的描述凸显了进一步研究该地区粘孢子虫多样性和分布的重要性。
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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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