日本入侵蚯蚓tokioamynthas tokioensis (Megascolecidae)的一新种(顶复合体亚,单囊虫科)goerresi,并描述了该寄生虫的生活史。

IF 1.5 4区 医学 Q3 PARASITOLOGY
Joseph J Schall
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引用次数: 2

摘要

描述了一种产于北美的重要入侵蚯蚓tokioamynthas (Beddard)的格林(顶复合体门,单囊虫科)寄生虫goerresstomatocystis sp. n.。这是第二个被归入该属的物种,其形态和生命周期的细节支持Stomatocystis Bandyopadhyay, Mitra et Göçmen, 2006作为一个有效的分类单元。新物种的描述使用标准的命名、测量、形状描述符和活细胞的照片。这种寄生虫只在tokioensis中发现,而在同域蚯蚓物种中没有发现,这表明它是在蚯蚓从日本的起源引入时到达的。该种与S. indica Bandyopadhyay, Mitra et Göçmen, 2006的模式种不同,在所有阶段都要大得多,只在宿主的精囊中发现,并且在东亚的不同宿主物种中发现。独特的滋养体/单体形成一个大的漏斗结构,其周围有明显的脊环,即使在最小的细胞中也会出现漏斗。这个漏斗在相对大小(相对于细胞体)和形状上变化很大,有时形成一个大扇形。本文描述了S. goerresi的生命周期,包括独特的合子作用,其中漏斗融合,然后产生一个具有局部同配子生产中心的大细胞(因此无性别的性别)。配子是大的(~5 μm)球体,尖端复杂。卵囊产量大,每个成熟配子囊> 1000个。口囊虫属被归入单囊虫科,但其生命周期不同于其他单囊虫分类群,这可能意味着口囊虫科不是单系的,或者在科内的生命周期是可变的。格氏葡萄球菌在型地的流行率较高(~ 90%)。这些寄生虫破坏了蚯蚓的精子自我储存器官,从而消除了雌雄同体寄主的雄性功能,这可能会影响蚯蚓在新地点的入侵和成功。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Stomatocystis goerresi, a new species of gregarine parasite (Apicomplexa, Monocystidae) from the invasive Japanese earthworm Amynthas tokioensis (Megascolecidae), with a description of the parasite's life cycle.

Stomatocystis goerresi sp. n., a gregarine (phylum Apicomplexa, Monocystidae) parasite of an important invasive earthworm in North America, Amynthas tokioensis (Beddard), is described. This is the second species placed into the genus, and details of its morphology and life cycle support Stomatocystis Bandyopadhyay, Mitra et Göçmen, 2006 as a valid taxon. The new species is described using standard nomenclature, measurements, shape descriptors, and photographs of living cells. The parasite was found only in A. tokioensis, and absent in sympatric earthworm species, suggesting it arrived when the earthworms were introduced from their origin from Japan. The species is distinctive from the type species in the genus, S. indica Bandyopadhyay, Mitra et Göçmen, 2006, in being substantially larger in all stages, found in only the host's seminal vesicles, and found in a different host species from East Asia. The distinctive trophozoites/gamonts develop a large funnel structure ringed with a collar of pronounced ridges, and the funnel appears even in the smallest cells. This funnel varies greatly in relative size (to the cell body) and shape, sometimes forming a large fan. The life cycle of S. goerresi is described including distinctive syzygy in which the funnels fuse and then produce a large cell with local centres of isogamete production (thus sex without gender). Gametes are large ( ~5 μm) spheres with complex tips. Oocyst production is large, > 1,000 per mature gametocyst. The genus Stomatocystis is placed into the Monocystidae, but the life cycle of the new species differs from those of other monocystid taxa, which may mean the Monocystidae are not monophyletic or life cycles are variable within the family. Prevalence of S. goerresi at the type locality was high (~ 90%). The parasites destroy the earthworm's organ of sperm self-storage thus eliminating the male function in the hermaphroditic host which may influence the ability of the earthworm to invade and be successful at new sites.

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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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