New Data on the Morphology and Distribution of Oswaldocruzia Skrjabini (Nematoda, Molineidae)

Svitin, Roman

doi:10.1515/vzoo-2015-0052

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…The molecular phylogenetic analysis also showed that Oswaldocruzia nematodes collected in this study from different species of amphibians and reptiles in European Russia belonged to the species Oswaldocruzia filiformis s.l. Thus, our data contradict the opinion that several species of this genus parasitise different host species in the Western Palearctic (Durette-Desset et al, 1993;, 1995Svitin, 2015Svitin, , 2016Svitin, , 2017.…”

Section: Discussioncontrasting

confidence: 88%

“…On the contrary, in Oswaldocruzia bialata and O. duboisi, the blade is sharp at the end and not divided into branches Durette-Desset et al, 1993;Svitin & Kuzmin, 2012;Svitin, 2016). Oswaldocruzia skrjabini has extra branches on the «fork» and the «shoe», and the blade is divided at the end into four branches (Svitin, 2015). In our study, all nematodes have an additional branch on each ray 10, which is also present in Oswaldocruzia skrjabini, but not found in O. filiformis, O. bialata and O. duboisi.…”

Section: Discussionsupporting

confidence: 42%

“…The body sizes of Oswaldocruzia nematodes taken from various species of amphibians and reptiles in our study were different (Table 3, Table 4, Table 5, Table 6). The mean body size of the Oswaldocruzia males collected by us was bigger than of males of Oswaldocruzia filiformis, O. bialata, O. duboisi and O. skrjabini Durette-Desset et al, 1993;Svitin & Kuzmin, 2012;Svitin, 2015Svitin, , 2016. The males collected from Lacerta agilis and Zootoca vivipara were an exception.…”

Section: Discussionmentioning

confidence: 64%

“…On the basis of the structure of spicules and the caudal bursa of males, Travassos (1937) described Oswaldocruzia skrjabini from Zootoca vivipara. The description of this nematode is also contained in Svitin (2015Svitin ( , 2016. Oswaldocruzia duboisi was described by Ben , taking into account the structure of the synlophe and spicules.…”

Section: Discussionmentioning

confidence: 99%

“…Intraand interpopulational variability of nematodes from vertebrates and, in particular, amphibians was also noted by Tarasovskaya (2009, 2011), Tarasovskaya & Pashkevich (2011, Kirillova et al (2012), Kirillov & Kirillova (2015), who showed that the body size of nematodes varied under the influence of such factors as sex, age, phenotype and host species, number of parasites in the host, seasonal changes and others. Oswaldocruzia duboisi (Svitin & Kuzmin, 2012) Oswaldocruzia bialata (Svitin, 2016) Oswaldocruzia skrjabini (Svitin, 2015) Oswaldocruzia duboisi (Svitin & Kuzmin, 2012) Oswaldocruzia bialata (Svitin, 2016) Oswaldocruzia skrjabini (Svitin, 2015) According to the structure of spicules, the nematodes found in amphibians and reptiles could only be assigned to Oswaldocruzia filiformis. In our nematodes, the spicular «blade» is divided at the end into three branches, while the «fork» and the «shoe» did not have extra branches.…”

Section: Discussionmentioning

confidence: 99%

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Oswaldocruzia filiformis sensu lato (Nematoda: Molineidae) from amphibians and reptiles in European Russia: morphological and molecular data

Kirillova¹,

Kirillov²,

Shchenkov³

et al. 2020

Nat. Conserv. Res.

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Nematodes of the genus Oswaldocruzia parasitise the small intestine of amphibians and reptiles. Their biodiversity remains unknown. We studied Oswaldocruzia nematodes from nine species of amphibians and reptiles (Pelophylax ridibundus, Rana arvalis, Rana temporaria, Bufo bufo, Lacerta agilis, Zootoca vivipara, Anguis fragilis, Natrix natrix, Vipera berus) at six localities in European Russia in 2018-2019. To identify their nematode species, we analysed the morphological characters traditionally used in the taxonomy of nematodes of this genus together with new molecular phylogenetic data. The results of partial sequencing and molecular phylogenetic analysis of CoxI mtDNA gene showed that all Oswaldocruzia specimens in this study belonged to the same species. We observed a broad morphological variability of nematodes both from different host species and from the same host individual. Morphological variation in nematodes from various host species could be host-induced, while that in nematodes from the same host individuals could be due to phenotypic plasticity of the species. Molecular data indicate that only one species of the genus Oswaldocruzia, O. filiformis s.l., which has a broad morphological variability, parasitises amphibians and reptiles in European Russia. The results of our study highlight the necessity of studying the diversity of morphologically similar Oswaldocruzia spp. from the Western Palearctic by molecular genetic methods.

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Section: Discussioncontrasting

confidence: 88%

Section: Discussionsupporting

confidence: 42%

Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Oswaldocruzia filiformis sensu lato (Nematoda: Molineidae) from amphibians and reptiles in European Russia: morphological and molecular data

Kirillova¹,

Kirillov²,

Shchenkov³

et al. 2020

Nat. Conserv. Res.

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Oswaldocruzia ukrainae (Nematoda: Molineidae)—A Parasite of European Green Toad Bufotes viridis: Morphological and Molecular Data

Kirillova

Kirillov

Shchenkov

et al. 2023

Biology

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Nematodes of the genus Oswaldocruzia are common parasites of the small intestine of amphibians and reptiles. Our recent molecular analysis of Oswaldocruzia nematodes revealed that only Oswaldocruzia filiformis, which possesses high morphological variability, parasitizes amphibians and reptiles in European Russia. Here we present the study of Oswaldocruzia nematodes from the European green toad Bufotes viridis (Anura, Bufonidae) collected at different localities of the Middle Volga region in 2018–2022. We analyzed the morphological characteristics of the Oswaldocruzia spp. taxonomy together with novel molecular phylogenetic data. The data on phylogenetic analysis (based on partial CoxI mtDNA gene sequences) showed that Bufotes viridis is parasitized by two Oswaldocruzia species, the host-specific parasite Oswaldocruzia ukrainae and species generalist Oswaldocruzia filiformis. Broad morphological variability was revealed in O. ukrainae nematodes both from the same host specimen and from various toad individuals from different localities. Our results highlight the need for further biodiversity research of morphologically similar Oswaldocruzia species from amphibians and reptiles in the Western Palearctic using molecular genetic methods.

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Helminths found in common species of the herpetofauna in Ukraine

Marushchak,

Syrota,

Dmytrieva

et al. 2024

BDJ

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Only a few comprehensive studies have been carried out on parasites in amphibians and reptiles in Ukraine. This has resulted in identifying over 100 helminth species across these vertebrate groups. However, most of the studies were performed in the 20th century and the taxonomy of many parasites and their hosts has changed ever since, in addition to the discovery of new species and registrations of species that had not been previously known for Ukraine. In recent decades, there have been very few publications on helminths from amphibian or reptile hosts in this region. Notably, just one of these recent studies is a faunistic study, providing a list of helminths found in two species of green frogs – Pelophylax ridibundus (Pallas, 1771) and Pelophylax esculentus (Linnaeus, 1758). Therefore, it is clear that publishing datasets of modern records of helminths in these vertebrate groups, based on modern taxonomy, is an essential step in further studies of their parasitic diversity. Additionally, such study is important in terms of global climate change, the growing number of possibilities of invasion of alien species (both hosts and parasites) that might potentially become a threat to native biota and growing anthropogenic pressure on local populations of hosts that affect the parasites as well. In future, this study is planned to be used for the creation of a checklist of helminths of the herpetofauna of Ukraine. The present dataset is an inventory of various species of helminths parasitising common species of the herpetofauna in central, northern, western and southern Ukraine recorded during field studies in the 2021-2023 period. The dataset is the first one to represent the up-to-date and unified data on helminths of reptiles and amphibians of Ukraine. Previously, records of this group of organisms with reference to their hosts were presented as several separate records within the country. Currently, this is the largest dataset presenting geocoded records of non-human-related helminths in the fauna of Ukraine. It reports helminth species from 15 hosts (205 individuals), including eight amphibians and seven reptilian species found in various Ukrainian regions. A total of 47 helminth species have been documented in the research and during 2021-2023 period on the territory of northern (Kyiv and Zhytomyr), western (Lviv, Zakarpattia Ivano-Frankivsk), central (Vinnytsia, Dnipropetrovsk, Cherkasy, Zaporizhzhia and Poltava) and southern (Odesa) regions of Ukraine. The identified helminth species belong to the following phyla: Acanthocephala (Centrorhynchidae (2), Echinorhynchidae (2)); Nematoda (Acuariidae, Anisakidae, Cosmocercidae (3), Dioctophymatidae, Gnathostomatidae (1), Kathlanidae (1), Molineidae (7), Onchocercidae (1), Pharyngodonidae (1), Rhabdiasidae (6), Strongyloididae); Platyhelminthes (Diplodiscidae (1), Diplostomidae (2), Encyclometridae (1), Haematoloechidae (1), Leptophallidae (2), Macroderidae (1), Mesocestoididae, Opisthorchiidae (2), Plagiorchiidae (3), Pleurogenidae (2), Polystomatidae (3), Proteocephalidae (1), Strigeidae (1) and Telorchiidae (3)). Only some helminths in the dataset were not identified to species level. Material is stored in the collection of the department of Parasitology of the I. I. Schmalhausen Institute of Zoology NAS of Ukraine.

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New Data on the Morphology and Distribution of Oswaldocruzia Skrjabini (Nematoda, Molineidae)

Cited by 3 publications

References 7 publications

Oswaldocruzia filiformis sensu lato (Nematoda: Molineidae) from amphibians and reptiles in European Russia: morphological and molecular data

Oswaldocruzia filiformis sensu lato (Nematoda: Molineidae) from amphibians and reptiles in European Russia: morphological and molecular data

Oswaldocruzia ukrainae (Nematoda: Molineidae)—A Parasite of European Green Toad Bufotes viridis: Morphological and Molecular Data

Helminths found in common species of the herpetofauna in Ukraine

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