Abstract Introduction Quasiamidostomum fulicae (Rudolphi, 1819) Lomakin, 1991, is a species of which the systematic position is still unclear, and it is reported in the literature under many synonyms. In the present study, an attempt has been made at establishing the ultimate systematic position of Quasiamidostomum fulicae against the backdrop of selected Amidostomatinae species. Material and Methods The parasites were identified based on measurements of external and internal structures. Ecological analysis of Q. fulicae was carried out using the quantitative indices (frequency, prevalence, mean intensity, relative abundance, and dominance index). Statistical analyses (discriminant analysis) were performed on measurement data. Results The intestines of 77 coots were examined. They yielded a total of 398 parasites, including 67 identified as Q. fulicae. Both males and females were located in the muscular gizzard. The morphometric analysis of Q. fulicae in this study showed the dimensions of all the internal organs to be in agreement with measurements reported by other authors. The discriminant analysis, used to find the differences between the examined nematode species (Amidostomoides acutum, A. petrovi, A. monodon, Amidostomum anseris, and Quasiamidostomum fulicae), gave highly significant results (P < 0.0001) with respect to both males and females. Conclusion The results justify the separation of Q. fulicae from the genus Amidostomum.

中文翻译：

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Quasiamidostomum fulicae (Rudolphi, 1819) Lomakin, 1991 (Nematoda: Amidostomatidae) 的重新描述，Fulica atra (Gruiformes) 的寄生虫

摘要 引言 Quasiamidostomum fulicae (Rudolphi, 1819) Lomakin, 1991，是一个系统位置仍不清楚的物种，在文献中以许多同义词报道。在本研究中，试图在选定的 Amidostomatinae 物种的背景下确定 Quasiamidostomum fulicae 的最终系统位置。材料和方法 根据对外部和内部结构的测量确定寄生虫。使用定量指数（频率、流行率、平均强度、相对丰度和优势指数）对 Q. fulicae 进行生态分析。对测量数据进行统计分析（判别分析）。结果检查了77只白豆的肠道。他们总共产生了 398 种寄生虫，其中 67 种被鉴定为 Q。富利卡。雄性和雌性都位于肌肉胗中。本研究中 Q. fulicae 的形态计量分析表明，所有内脏器官的尺寸与其他作者报告的测量结果一致。判别分析用于发现所检查线虫种类（Amidostomoides acutum、A. petrovi、A. monodon、Amidostomum anseri 和 Quasiamidostomum fulicae）之间的差异，对雄性和雌性都给出了非常显着的结果（P < 0.0001） . 结论 该结果证明了从 Amidostomum 属中分离 Q. fulicae 是合理的。判别分析用于发现所检查线虫种类（Amidostomoides acutum、A. petrovi、A. monodon、Amidostomum anseri 和 Quasiamidostomum fulicae）之间的差异，对雄性和雌性都给出了非常显着的结果（P < 0.0001） . 结论 该结果证明了从 Amidostomum 属中分离 Q. fulicae 是合理的。判别分析用于发现所检查线虫种类（Amidostomoides acutum、A. petrovi、A. monodon、Amidostomum anseri 和 Quasiamidostomum fulicae）之间的差异，对雄性和雌性都给出了非常显着的结果（P < 0.0001） . 结论 该结果证明了从 Amidostomum 属中分离 Q. fulicae 是合理的。