Euura fuscarima Prous & Liston & Monckton & Kramp & Vårdal & Vikberg & Heibo & Mutanen 2025

111 Euura fuscarima (Benson, 1933) comb. nov. Figs 123–124, 349 Pteronidea fuscarima Benson, 1933: 258–259. Pteronidea striatipleuris Lindqvist, 1958: 106–107. Syn. nov. Pteronidea epimeris Lindqvist, 1969: 241. Syn. nov. Pteronidea peltoneni Lindqvist, 1969: 239–241. Syn. nov. Diagnosis Females are typically almost completely yellow, resembling E. flavescens, that is externally hardly distinguishable. The serrulae of E. flavescens protrude less than in E. fuscarima. In addition, the dorsobasal part next to the suture of basalmost annulus of the saw of E. flavescens has a dorsally widening pale area that is absent in E. fuscarima. Even more similar to E. fuscarima could be E. seriepunctata (also flavescens group), which seems also to have less protruding serrulae than E. fuscarima. The only males we have studied are paratypes of E. fuscarima that were reared together with the females. Males are generally significantly darker dorsally than females. Penis valves are most similar to E. taegeri and clearly distinguishable from the flavescens group penis valves. Although not identical, one sequenced darker specimen (ZMUO.035621) of fuscarima from Utsjoki (northern Finland) clearly groups with the typical fuscarima from the south based on nuclear genes. The ZMUO.035621 specimen matches well (saw and colouration) with the holotypes of striatipleuris and epimeris from northern Finland. These darker specimens from the North are dorsally extensively black and the thorax can be slightly black also laterally. Considering the generally large colour variability in many species of Euura and close genetic similarity of ZMUO.035621 to typical fuscarima, we treat striatipleuris and epimeris as synonyms of fuscarima. Based on its penis valve, the paratype of epimeris (http://id.luomus.fi/GL.3495) may belong to E. fuscodorsata (ZMUO.035607). The study of the saw of the lectotype of Nematus testaceus Thomson (primary homonym of Nematus testaceus Stephens) revealed it to belong to E. flavescens, which also means that the replacement name previously used for fuscarima, Pteronidea stichi Enslin, 1913 is a synonym of E. flavescens and therefore not available for fuscarima. Type material examined Holotype Pteronidea fuscarima IRELAND – Wicklow • ♀; Devil’s Glen; 53.02° N, 6.15° W; larvae collected Oct. 1927, emerged May 1928; A.W. Stelfox leg.; larvae on Salix; BMNH, B.M.TYPEHYM.1.632. Holotype Pteronidea striatipleuris FINLAND – Lapin Lääni • ♀; Kilpisjärvi; 69.04° N, 20.81° E; 6 Jul. 1953; E. Lindqvist leg.; MZH, http://id.luomus.fi/GL.3551. Notes 18 serrulae. Best morphological match: ZMUO.035621 (17–18 serrulae). Holotype Pteronidea epimeris FINLAND – Lapin Lääni • ♀; Kilpisjärvi; 69.04° N, 20.81° E; 7 Jul. 1966; V. Karvonen leg.; MZH, http://id.luomus.fi/GL.3494. Notes 17 serrulae. Holotype Pteronidea peltoneni FINLAND – Uusimaa • ♀; Helsinki, Herttoniemi; 60.20° N, 25.04° E; larvae collected 1 Sep. 1964, adult emerged 30 Sep. 1964; E. Peltonen leg.; host Salix phylicifolia; MZH, http://id.luomus.fi/GL.3517. Host plants Salix spp. Two generations (Benson 1933). Genetics COI Based on 5 specimens, maximum within-species distance is 4.43% and the nearest neighbour, diverging by a minimum of 0%, is Euura polaris. Nuclear Based on 3 specimens, maximum within-species distance is 0.78% (0.25% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 1.02%, is Euura polaris. Distribution and material examined Palaearctic. Specimens studied are from Austria, Finland, Ireland, and Sweden.