{"key":"ccf0752d-f005-4e51-9feb-fda2c46d64b6","installationKey":"d0e2b9a9-8496-4959-8cba-a7fea22537eb","publishingOrganizationKey":"ca2fd897-6108-4361-91f8-b39dc8d12d13","doi":"10.15468/xjyyey","version":"1.1","external":false,"numConstituents":0,"type":"OCCURRENCE","subtype":"OBSERVATION","shortName":"Helminths of common herp species from Ukraine","title":"Records of helminths of common amphibians and reptiles species made in terms of a project \"Parasites and the Sixth Extinction: Studying the Status of Parasite Assemblages and Populations of Model Animal Groups in the Current Biodiversity Crisis\" on the territory of Ukraine","description":"\n            The dataset presents the records of helminths made in the collected 14 species of common herpetofauna representatives of Ukraine (7 reptiles species (2 of which are invasive and were examined for the presence of helminths for the 1st time in Ukraine) and 7 amphibian species. The dataset is the largest data aggregation of such info on intestinal parasitic organisms published from the territory of Ukraine. Some of the records refer to the earlier collection of material that was processed and examined for the presence of helminths within the framework of the related project.\n        ","language":"eng","citation":{"text":"Kuzmina T, Svitin R, Syrota Y, Dmytriieva I, Nechai A, Lisitsyna O, Greben O, Dupak V, Marushchak O, Antipova K, Marushchak O (2026). Records of helminths of common amphibians and reptiles species made in terms of a project \"Parasites and the Sixth Extinction: Studying the Status of Parasite Assemblages and Populations of Model Animal Groups in the Current Biodiversity Crisis\" on the territory of Ukraine. Version 1.1. Ukrainian Nature Conservation Group (NGO). Occurrence dataset https://doi.org/10.15468/xjyyey accessed via GBIF.org on 2026-10-12.","citationProvidedBySource":false},"contactsCitation":[{"key":7059347,"abbreviatedName":"Kuzmina T","firstName":"Tetiana","lastName":"Kuzmina","roles":["ORIGINATOR"],"userId":["https://orcid.org/0000-0002-5054-4757"]},{"key":7059348,"abbreviatedName":"Svitin R","firstName":"Roman","lastName":"Svitin","roles":["ORIGINATOR"],"userId":["https://orcid.org/0000-0002-5450-7240"]},{"key":7059349,"abbreviatedName":"Syrota Y","firstName":"Yaroslav","lastName":"Syrota","roles":["ORIGINATOR"],"userId":["https://orcid.org/0000-0002-8070-9823"]},{"key":7059350,"abbreviatedName":"Dmytriieva I","firstName":"Ivanna","lastName":"Dmytriieva","roles":["ORIGINATOR"],"userId":[]},{"key":7059351,"abbreviatedName":"Nechai A","firstName":"Andrii","lastName":"Nechai","roles":["ORIGINATOR"],"userId":[]},{"key":7059352,"abbreviatedName":"Lisitsyna O","firstName":"Olga","lastName":"Lisitsyna","roles":["ORIGINATOR"],"userId":[]},{"key":7059353,"abbreviatedName":"Greben O","firstName":"Oksana","lastName":"Greben","roles":["ORIGINATOR"],"userId":["https://orcid.org/0000-0001-9942-2542"]},{"key":7059354,"abbreviatedName":"Dupak V","firstName":"Valeriia","lastName":"Dupak","roles":["ORIGINATOR"],"userId":["https://orcid.org/0000-0002-0957-3791"]},{"key":7059355,"abbreviatedName":"Marushchak O","firstName":"Oleksii","lastName":"Marushchak","roles":["ORIGINATOR"],"userId":["https://orcid.org/0000-0001-9380-5593"]},{"key":7059356,"abbreviatedName":"Antipova K","firstName":"Kateryna","lastName":"Antipova","roles":["ORIGINATOR"],"userId":[]},{"key":7059357,"abbreviatedName":"Marushchak O","firstName":"Olexiy","lastName":"Marushchak","roles":["METADATA_AUTHOR"],"userId":["https://orcid.org/0000-0001-9380-5593"]}],"lockedForAutoUpdate":false,"createdBy":"ca2fd897-6108-4361-91f8-b39dc8d12d13","modifiedBy":"crawler.gbif.org","created":"2026-06-29T13:39:52.215+00:00","modified":"2026-06-29T15:13:09.726+00:00","contacts":[{"key":7059347,"type":"ORIGINATOR","primary":true,"userId":["https://orcid.org/0000-0002-5054-4757"],"firstName":"Tetiana","lastName":"Kuzmina","position":["leading researcher"],"email":["takuzmina@gmail.com"],"phone":[],"homepage":["http://www.izan.kiev.ua/ppages/kuzmina/index.htm"],"organization":"I. 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Schmalhausen Institute of Zoology NAS of Ukraine","address":["Vul. B. Khmelnytskogo, 15"],"city":"Kyiv","country":"UA","postalCode":"01030","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-06-29T15:13:09.696+00:00","modified":"2026-06-29T15:13:09.696+00:00"},{"key":7059353,"type":"ORIGINATOR","primary":false,"userId":["https://orcid.org/0000-0001-9942-2542"],"firstName":"Oksana","lastName":"Greben","position":["senior researcher"],"email":[],"phone":[],"homepage":[],"organization":"I. I. Schmalhausen Institute of Zoology NAS of Ukraine","address":["Vul. B. 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Consequently, most hosts were collected from late April to early May and up to the beginning of November in the period from 2017 till 2026. This adjustment did not compromise the study's validity; helminth prevalence and intensity typically increase during the post-spawning and summer-autumn periods due to the hosts' active feeding, migration, and the completed development of parasites acquired at early larval stages. Furthermore, this avoids the potential bias of winter mortality, which often eliminates individuals weakened by hyperinvasion.\nMost species of amphibians and reptiles were captured by hand or using modified hydrobiological and heavy-duty dip nets. European pond turtles were caught using modified crab traps with widened entrances and attached plastic bait containers. Freshly euthanized fish from the same water bodies served as the most effective bait.\nAutopsies were performed in field laboratories directly during expedition trips, or live animals were transported to the laboratory of the I. I. Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine. Plastic containers of suitable sizes with holes for ventilation and lined with moist plant substrate, paper towels or soft cloth were used to transport the hosts. Amphibians and reptiles were euthanised by the injection of 10% lidocaine in the brain or bloodstream (terrapins) and dissected. For amphibians, the spinal cord was cut and the spinal canal was washed with saline using the thin Pasteur pipette in order to check for the presence of trematode larvae. This could not be done for reptile parasites due to thin spinal canal as it is too narrow and long. All organs were removed, washed in saline and checked for presence of parasites. The body cavity, large muscles and subcutaneous space was also checked for parasites in selected individuals. Found parasites were carefully removed, placed in small Petri dishes with saline and then fixed accordingly to the taxonomic group. Nematodes and smaller trematodes were fixed with hot 70% ethanol, monogeneans, large trematodes and cestodes were killed with hot water and then fixed with 70% ethanol, acanthocephalans were left in distilled water for up to 24 hours for the proboscis extending and then fixed with 70% ethanol. For larval stages found in cysts, part was excysted and fixed with 70% ethanol, while other part was fixed in cysts or (in case of hyper invasion with one species) counted and not taken. All parasites were transferred to vials with 70% ethanol ad subsequently stored in the fridge. Several monogeneans were fixed in 10% formalin and stored at room temperature.\nTrematodes were stained with Mayer's hematoxylin in the following stages: soaking the material extracted from 70% ethanol in water (5 min.); immersion in dye (5–10 min., the duration depends on the size of the individuals); immersion in a solution of hydrochloric acid (5 min.); ammonia solution (5 min.); passing through alcohols of increasing concentration (70%, 80%, 90%, 96%, 100% – 5(7) min. for each stage); enlightenment in clove oil (10–15 min.) and inclusion in Canadian balm on a permanent preparation.\nDyeing with carmine was carried out according to the following scheme: immersion in dye (5–10 min.); acidified alcohol (5 min.); passing through alcohols of increasing concentration (80%, 90%, 96%, 100% - 5(7) minutes for each stage); enlightenment in clove oil (10–15 min.) and inclusion in Canadian balm on a permanent preparation.\nResearch on the morphology of helminths was carried out under an AmScope T690B light microscope with a digital camera, and photomicrographs were obtained on a ZEISS Axio Imager M1 System microscope at the Center for Collective Use of Scientific Instruments \"Animalia\" (https://www.izan.kiev.ua/cen-coll.htm ) at the Institute of Zoology. The original and latest redescriptions of species descriptions were used for the determination, as well as the tables given in the monographs of K. M. Ryzhikov with co-authors (Рыжиков, 1980), V. P. Sharpila and N. I. Iskova (Шарпило, 1989) and in separate articles . Some individuals of the larval stages of nematodes and trematodes are defined only to higher taxonomic ranks, because they lack diagnostic features of taxa of a lower rank.","qualityControl":"The authors are fully responsible for the quality and accuracy of data provided within the dataset.","methodSteps":["Conducting of field trips in search for the helminths' hosts, possibly infected by the target parasites.","Humane autopsies of the hosts for the following dissections and study of helminths.","Extracting and identification of helminths according to the standard methods.","Georeferencing.","Organizing of the dataset according to the Darwin Core standards."]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"eng","acknowledgements":"<p>The authors are sincerely grateful to the Armed Forces of Ukraine for the opportunity to conduct scientific research in wartime!</p>","pubDate":"2026-06-29T00:00:00.000+00:00","maintenanceUpdateFrequency":"UNKNOWN","maintenanceDescription":"The dataset may be updated with new records and more accurate species identifications based on the molecular and genetic studies. The frequency of such updates is unknown.","license":"http://creativecommons.org/licenses/by/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Occurrence","extensions":[],"modified":"2026-06-29T15:13:09.634+00:00"},"approximateCounts":{"occurrenceCount":3781}}