Euura tibialis
Creators: name: Prous, Marko
name: Liston, Andrew
name: Monckton, Spencer K.
name: Kramp, Katja
name: Vårdal, Hege
name: Vikberg, Veli
name: Heibo, Erik
name: Mutanen, Marko
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Euura
Euura tibialis

description: 190 Euura tibialis (Newman, 1837)
Figs 205, 438
Nematus tibialis Newman, 1837: 260. Syntypes ♀♀, not located. Type locality: United Kingdom, England, Isle of Wight.
Nematus hortensis Hartig, 1837: 197. Lectotype designated below. Synonymy by Cameron (1876c).
Nematus xanthobaptus Förster, 1854b: 430–431. Lectotype designated below. Synonymy with N. hortensis by Kriechbaumer (1885).
Nematus trilineatus Norton, 1867: 215. Holotype ♀ (ANSP Type no. 10334, ANSP), not examined. Type locality: Canada.
Nematus catachloris Snellen van Vollenhoven, 1869: 120, pl. 3. Lectotype ♀ (ZMAN), not examined, designated by Thomas (1987). Type locality: Netherlands, Leiden area. Synonymy with N. hortensis by Dalla Torre (1894).
Nematus similaris Norton, 1880: 222–224, pl. IV. Syntypes 3 ♀♀ (USNMENT00778331, USNM, http://n 2t.net/ark:/65665/3755cb4a5-8c5f-42b9-ae22-7f22c41f1ad8), not examined. Type locality: USA, Missouri.
Nematus robiniae Forbes, 1885: 116. Holotype ♀ (INHS), not examined. Type locality: USA, Illinois, Normal.
Pteronus solitarius Rohwer, 1908: 107–108. Holotype ♀ (USNMENT00779506, USNM, http://n 2t. net/ark:/65665/3ba054722-da5b-4824-b22c-87a160eacfc7), not examined. Type locality: USA, Colorado, Trinidad.
Diagnosis
Bifid claws, valvula 3 (narrow and pointed in dorsal view), penis valves, and colour pattern enable reliable identification of the species. The body is dorsally at least partly black, laterally and ventrally completely or nearly completely pale and antenna, metatibia, and metatarsus are black. Males are extremely rare.
Type material examined
Lectotype Nematus hortensis, here designated
GERMANY • ♀; ZSM, GBIF-GISHym3292.
Lectotype Nematus xanthobaptus, here designated
GERMANY – Nordrhein-Westfalen • ♀; Köln; 50.95° N, 6.95° E; ZSM, GBIF-GISHym3458.
Host plants
Trees of the Fabaceae. In the West Palaearctic, Robinia pseudoacacia L. is the usual host plant, but other species of Robinia L. (Liston 2011) and Sophora japonica L. (Schedl 2010) are occasionally used, and in North America Gleditsia triacanthos L. (Raizenne 1957).
Genetics
COI
Based on 5 specimens, maximum within-species distance is 1.07% and the nearest neighbours, diverging by a minimum of 7.49%, are Euura connecta, E. leptostigma, and E. leucopyga.
Nuclear
Only one sequence available, a female with haplotypes diverging by 0.17%. The nearest neighbour, diverging by a minimum of 1.41%, is Euura myosotidis.
Distribution and material examined
Holarctic. Specimens studied are from Belgium, Bulgaria, Estonia, Germany, Italy, and Romania.
description: Published as part of Prous, Marko, Liston, Andrew, Monckton, Spencer K., Kramp, Katja, Vårdal, Hege, Vikberg, Veli, Heibo, Erik & Mutanen, Marko, 2025, West Palaearctic species of Euura Newman, 1837 (Hymenoptera, Tenthredinidae), pp. 1-377 in European Journal of Taxonomy 977 on pages 137-138, DOI: 10.5852/ejt.2025.977.2799, http://zenodo.org/record/15019574