Euura annulata Prep.

105 Euura annulata (Gimmerthal, 1834) Figs 103, 337 Nematus annulatus Gimmerthal, 1834: 123–124. Syntype ♂ (specimen deposition unknown). Type locality: Estonia or Latvia. Nematus (Nematus) xanthopterus Dahlbom, 1835b: 8. Replacement name for Tenthredo rumicis Linnaeus, 1758 sensu Fallén, 1808. Nematus flavipennis Cameron, 1876a: 189. Syntype ♀ (BMNH?), not examined. Type locality: United Kingdom, Scotland, Rannoch and Kingussie. Synonymy by Brischke (1883). Nematus leucocarpus André, 1880a: 145. Lectotype designated below. Primary homonym of Nematus leucocarpus Hartig, 1840. Syn. nov. Nematus valesiacus W.F. Kirby, 1882: 394. Replacement name for Nematus leucocarpus André, 1880. Pachynematus lacteipennis Benson, 1963: 162–164. Synonymy by Taeger & Blank (1998). Commonly used names have been Pachynematus rumicis (Benson 1958a) and Nematus rumicis (Zhelohovcev & Zinovjev 1988). Diagnosis Female Mostly black to extensively pale, head (always?) extensively pale around eyes, pterostigma pale, claws with small subapical tooth, valvula 3 short and gradually tapering. Lancet has 11–12 annuli, with teethlike setae, and basal 2–3 annuli without serrulae. Male (differences from female) Extensively to mostly pale. Most similar species is E. gehrsi, from which it usually differs by its larger size and paler colouration. Paravalva of E. annulata is possibly more abruptly narrowed basally compared to E. gehrsi.An externally very similar species is also E. taegeri (character states in parentheses), from which it differs by having lancet with about 11 annuli (about 15 annuli), basal 2–3 annuli without serrulae (all annuli with serrulae), convex ventroapical margin of lancet (straight or concave), and slender valvispina. Another similar species is E. infirma, from which it differs in its larger size, paler colouration, broader valvula 3, basal 2–3 annuli without serrulae (all annuli with serrulae), convex ventroapical margin of lancet (straight or concave), and pseudoceps without apical filament (with filament). Type material examined Lectotype Nematus leucocarpus, here designated SWITZERLAND • ♀; Alpes du Valais; Desbrochers leg.; ZIN, DEI-GISHym89375. Holotype Pachynematus lacteipennis AUSTRIA – Lower Austria • ♀; Semmeringgebiet, Raxalp; 47.70° N, 15.74° E; 1830 m a.s.l.; 3 Jun. 1957; R.B. Benson leg.; BMNH, B.M.TYPEHYM.1.789. Host plants Rumex spp. (Nyman et al. 2006; Macek et al. 2020). There can be up to two generations per year in central Europe (Weiffenbach 1985 [under the name Pachynematus rumicis]). Genetics COI Based on 7 specimens, maximum within-species distance is 3.96% and the nearest neighbour, diverging by a minimum of 0.61%, is Euura gehrsi. Nuclear Based on 2 specimens, maximum within-species distance is 0.61%. The nearest neighbour, diverging by a minimum of 0.5%, is Euura gehrsi. Distribution and material examined Palaearctic. Specimens studied are from Austria, Finland, Germany, Iceland, Norway, Sweden, Switzerland, and the United Kingdom.