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 335 Nematus umbratus Thomson, 1871 Nematus breviusculus Eversmann, 1847: 17 . Nomen oblitum . Lectotype designated below. Was incorrectly synonymised with Euura melanocephalus ( Hartig, 1837 ) by Prous et al . (2017) . Syn. nov. Nematus umbratus Thomson, 1871: 142–143 . Nomen protectum . Lectotype designated by Prous et al . (2019). Pteronidea holmgreni Lindqvist, 1968: 192 . Synonymy by Liston et al . (2023) . In accordance with Article 23.9.1 of the International Code of Zoological Nomenclature ( ICZN 1999 ), we retain the junior name umbratus as valid, because it has been used more than 25 times by at least ten authors as the valid name for this taxon during the last 50 years, whereas breviusculus has not been used as valid since 1899. Examples of use of umbratus or umbrata as the valid name for this taxon during the last fifty years: Hellén 1976 ; Smith 1979 ; Verzhutskii 1981 ; Kangas 1985 ; Viitasaari & Vikberg 1985 ; Zhelochovtsev 1988; Liston 1995 , 1997; Zhelochovtsev & Zinovjev 1995 ; Taeger et al . 1998, 2006, 2010; Lacourt 1999 , 2020 ; Pschorn-Walcher & Altenhofer 2000 ; Haris 2001 ; Liston et al . 2006 ; Roller & Haris 2008 ; Schedl 2009 ; Prous et al . 2014 , 2017, 2021; Macek & Kula 2014 ; Chevin & Savina 2016 ; Sundukov 2017b ; Macek et al . 2020 ; Liston et al . 2023 Diagnosis (male) The penis valve of holmgreni figured in the original description ( Lindqvist 1968: 195 , fig. 11) appears to be taken from an earlier publication under the name Nematus ( Pteronidea ) sp. ( Lindqvist 1967a: 20 , fig. 14), which fits better with the penis valve of Euura pohjola . The actual penis valve of the holmgreni holotype is not different from the penis valve of Nematus umbratus , which indeed is rather similar to that of Euura pohjola . Differences between the penis valves of N. umbratus and E. pohjola are as follows: a Ventroapical lobe of paravalva extending about one third of the length of valvispina so that the apical margin of paravalva appears less oblique or even roughly perpendicular relative to the valvispina b Basal third or half of valvar strut more or less at the ventral margin of paravalva c Dorsobasal part of paravalva narrowing more abruptly ..................................... Nematus umbratus aa Ventroapical lobe of paravalva extending about half of the length of valvispina so that the apical margin of paravalva appears more oblique relative to the valvispina bb Valvar strut distinctly removed from ventral margin of paravalva cc Dorsobasal part of paravalva narrowing more gradually ........................................... Euura pohjola Type material examined Lectotype Nematus breviusculus , here designated RUSSIA – Tatarstan • Gynandromorph ; Kasan Province ; 55.8° N , 49.1° E ; 8 Jul. ; E. Eversmann leg.; ZIN , DEI-GISHym30032 . Lectotype Nematus umbratus SWEDEN • ♀ ; Lapponia Media [ central Lapland ]; 25 Jul.; C.H. Boheman leg.; MZLU , MZLU2017310 . Holotype Pteronidea holmgreni SWEDEN – Torne Lappmark • ♂ ; Torneträsk ; 68.22° N , 19.74° E ; 400 m a.s.l. ; R. Malaise leg.; NHRS , NHRS-HEVA000004010 . Notes The paratype female belongs to E. leptostigma .