Euura moerens

144 Euura moerens (Förster, 1854) Figs 144, 381 Nematus moerens Förster, 1854a: 294–295. Lectotype designated below. Nematus pygostolus Förster, 1854b: 431–432. Lectotype designated by Weiffenbach (1962). Synonymy by Weiffenbach (1962). Nematus pleuralis Thomson, 1863: 628. Lectotype designated below. Synonymy by Enslin (1916a). Pachynematus pullus Konow, 1903a: 379 (key). Lectotype designated below. Synonymy by Lindqvist (1976). Pachynematus falonus Ross, 1945: 108 (key). Holotype ♂ (INHS), not examined. Type locality: Canada, Alberta, Edmonton. Pachynematus torridonensis Liston, 1980b: 52–53. Synonymy by Liston (1995). Diagnosis Females are most similar to E. lichtwardti. Metatarsomere 1 and metafemur are usually extensively pale in E. moerens, but usually completely or nearly completely black E. lichtwardti. In males, the apical projection of tergum 8 is absent or indistinct unlike most other Euura (thus more like most Pristiphora). Penis valves reliably separate E. moerens from the other species. Type material examined Lectotype Nematus moerens, here designated GERMANY – Nordrhein-Westfalen • ♀; Aachen area; 50.77° N, 6.09° E; ZSM, DEI-GISHym88919. Notes According to Taeger & Blank (1998) the lectotype was designated by Haris (1997), but no such designation was made. Lectotype Nematus pygostolus GERMANY – Nordrhein-Westfalen • ♂; Aachen area; 50.77° N, 6.09° E; ZSM, DEI-GISHym12488. Lectotype Nematus pleuralis, here designated SWEDEN • ♀; Stockholm; 59.31° N, 18.04° E; C.H. Boheman leg.; NHRS, NHRS-HEVA000006326. Lectotype Pachynematus pullus, here designated FRANCE – Champagne-Ardenne • ♀; Charleville-Mézières; 49.76° N, 4.72° E; 11 May 1895; SDEI, GBIF-GISHym3882. Holotype Pachynematus torridonensis UNITED KINGDOM – Scotland • Wester Ross, Coire MhicNobuil, near Allt Toll a’Mhaidaich; 57.57° N, 5.56° W; 150 m a.s.l.; 16 May 1978; A.D. Liston leg.; RSME. Host plants Calamagrostis arundinacea (L.) Roth (Kangas 1985), Poa sp. and Festuca sp. (Macek et al. 2020). Genetics COI Based on 8 specimens, maximum within-species distance is 6.75% and the nearest neighbour, diverging by a minimum of 0.97%, is Euura clitellata. Nuclear Based on 7 specimens, maximum within-species distance is 0.23% (0.35% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 1.38%, is Euura fallax. Distribution and material examined Holarctic. Specimens studied are from Finland, France, Germany, Norway, Sweden, and the United Kingdom.