West Palaearctic species of Euura Newman, 1837 (Hymenoptera, Tenthredinidae) Author Prous, Marko 5E0EFC23-7C71-42E6-A031-BB9B09AD6C30 Museum of Natural History, University of Tartu, Vanemuise 46, 51003 Tartu, Estonia. & Ecology and Genetics Research Unit, PO. Box 3000, FI- 90014 University of Oulu, Finland. mprous@ut.ee Author Liston, Andrew 55C10B5B-D218-43CB-9B58-7E972FEB096E Senckenberg Deutsches Entomologisches Institut, Eberswalder Strasse 90, 15374 Müncheberg, Germany. andrew.liston@senckenberg.de Author Monckton, Spencer K. 3B1E7139-C82E-40F9-8FB3-93CFDA318EAD Centre for Biodiversity Genomics, University of Guelph, 50 Stone Road East, N 1 G 2 W 1, Guelph, ON, Canada. s.monckton@gmail.com Author Kramp, Katja 72579D81-D3A8-4803-91AC-4C928C83EBEB Leibniz Centre for Agricultural Landscape Research, Eberswalder Str. 84, 15374 Müncheberg, Germany. katja.kramp@zalf.de Author Vårdal, Hege C87892C8-EE6B-4520-8402-85FD0E297455 Swedish Museum of Natural History, Box 50007, SE- 10405 Stockholm, Sweden. hege.vardal@nrm.se Author Vikberg, Veli 7B5E2CCB-CD39-4744-A695-05EF3076373C Liinalammintie 11 as. 6, FI- 14200 Turenki, Finland. veli.vikberg@pp.inet.fi Author Heibo, Erik C1D82863-A4E6-497B-8329-ED326387B80D Rypeveien 34 A, 3420 Lierskogen, Norway. eheibo@yahoo.no Author Mutanen, Marko 627B15F5-FFE5-40DE-9A78-FF2FD900A7B1 Ecology and Genetics Research Unit, PO. Box 3000, FI- 90014 University of Oulu, Finland. & Marko. Marko.Mutanen@oulu.fi text European Journal of Taxonomy 2025 2025-02-27 977 1 377 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2799/12795 journal article 308603 10.5852/ejt.2025.977.2799 9b348823-385e-4e75-81fe-14b440580125 2118-9773 15019574 73DA044B-EB3D-4BF1-97EA-7430036DEEE0 279 Euura vicina group Mostly defined based on genetic data. The species are also morphologically similar, but we have not found consistent morphological characters that define the group to the exclusion of other Euura . Host plants are known for E. vicina ( Rumex ) and E. notabilis ( Bistorta , this study). In addition, based on the sequencing of larval gut contents, a specimen (DEI-GISHym80076) from Primorsky Krai ( Russia ) had apparently fed on Bistorta sp. At this point it is not possible to say which species DEI-GISHym80076 could be, genetically it is closest to E. putoni and E. notabilis , but currently there is no genetic data for E. nigerrima . Based on these host plant observations and the habitats where other species have been collected, it can be suggested that all species of the vicina group are on Polygonaceae .