Redescription of Quasiamidostomum fulicae (Rudolphi, 1819) Lomakin, 1991 (Nematoda: Amidostomatidae), a parasite of Fulica atra (Gruiformes)

Abstract

IntroductionQuasiamidostomum 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 MethodsThe 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.ResultsThe 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.ConclusionThe results justify the separation of Q. fulicae from the genus Amidostomum.

Molecular Character of Mylonchulus hawaiiensis and Morphometric Differentiation of Six Mylonchulus (Nematoda; Order: Mononchida; Family: Mylonchulidae) Species Using Multivariate Analysis

“…However, in some species of the Mylonchulus, the morphology and morphometrics overlap [4], so species identification becomes problematic. Multivariate analysis of morphometric characteristics has been used to differentiate species of the animals, such as fish [18], or different populations belonging to the same species using discriminant analysis for nematodes [19,20]. However, the usefulness of multivariate analysis to distinguish the Mylonchulus species has not yet been investigated.…”

Helminths of the Eurasian Coot Fulica atra at Lake Ladoga Coast (Northwestern Russia)

“…In the Neotropical region, however, these trematodes also infect other waterfowl (Padilla-Aguilar et al 2020). Similarly, the nematode Q. fulicae has been reported almost exclusively from coots, being much rarer in other waterfowl in the Palearctic (Królaczyk et al 2020). The trematode L. polyoon is also a specific parasite of the Eurasian coot (Sitko et al 2006;Kanarek et al 2017).…”

“…The parasitic fauna of F. atra of Eurasia comprises 117 species: four acanthocephalans, 25 nematodes, 21 cestodes and 67 trematodes (Pukhov 1939;Bashkirova 1941;Shakhtahtinskaya 1959;Pavlov 1960Pavlov , 1962Pavlov , 1966Pavlov and Sergeeva 1961;Bykhovskaya-Pavlovskaya 1962;Sergienko 1972;Smogorzhevskaya 1976;Borgarenko 1981Borgarenko , 1984Borgarenko , 1990Pojmanska 1982;Maksimova 1989;Nekrasov 2000;Movsesyan et al 2004Movsesyan et al , 2006Movsesyan et al , 2017Semenova and Ivanov 2005;Sitko et al 2006;Gherman et al 2008;Fedorovich et al 2010;Sitko and Okulewicz 2010;Sitko 2011;Mahmudova 2012;Zhang et al 2012;Ivanov et al 2013;Penkina and Okolelov 2013; Supplementary Table S2). In some localities, however, only certain groups of parasites infecting F. atra have been studied (Pojmanska 1982;Zhang et al 2012;Królaczyk et al 2018Królaczyk et al , 2020etc).…”

“…Morphometric methods based on systematic keys were used for identification (Filimonova 1985;Sonin 1985;Khokhlova 1986;Tolkacheva 1991;Jones 2008;Lotz and Font 2008;Królaczyk et al 2020). A morphological study of parasites was carried using the Olympus CX-41 video system (Olympus Corporation, Tokyo, Japan) and the Levenhuk C1400 NG, LevenhukToupView software, V.3.5 (equipment of Core Facility of the Karelian Research Centre of the Russian Academy of Sciences).…”

“…The parasitic fauna of F. atra has been extensively studied in different parts of Eurasia (Pukhov 1939;Bashkirova 1941;Ginetsinskaya 1952;Bykhovskaya-Pavlovskaya 1953;Shakhtahtinskaya 1959;Pavlov 1960Pavlov , 1962Pavlov , 1966Sergienko 1972;Smogorzhevskaya 1976;Pojmanska 1982;Nekrasov 2000;Semenova and Ivanov 2005;Sitko et al 2006;Gherman et al 2008;Fedorovich et al 2010;Sitko and Okulewicz 2010;Sitko 2011;Mahmudova 2012;Zhang et al 2012;Ivanov et al 2013;Penkina and Okolelov 2013;Królaczyk et al 2018Królaczyk et al , 2020. However, there is no information about the parasite fauna of the Eurasian coot along the coast of Lake Ladoga.…”