Euura villosa

138 Euura villosa (Thomson, 1863) Figs 136, 372 Nematus villosus Thomson, 1863: 629. Lectotype designated below. Nematus arcticus Holmgren, 1869: 18. Lectotype designated below. Synonymy by Hellén (1943). Nematus brachyacanthus var. palliditarsus Cameron, 1876b: 312–313. Holotype ♂ (BMNH), not examined. Type locality: Norway; Spitsbergen [Svalbard]. Synonymy by Benson (1934). Nematus gelidus W.F. Kirby, 1882: 115–116. Holotype ♂ (BMNH), not examined. Type locality: Norway; Spitsbergen [Svalbard]. Synonymy by Benson (1934). Diagnosis Its large size (♀ 8–10 mm, ♂ 7–9 mm), black body with yellow legs (including complete hind tibia and most of hind tarsus), long hair on head and thorax, and yellow pterostigma distinguish the species well from the other Euura. Euura caeruleocarpus is genetically very close (see under that species for morphological differences). Type material examined Lectotype Nematus villosus, here designated SWEDEN • ♀; Lapponia intermedia [central Lapland]; C.H. Boheman leg.; NHRS, NHRS-HEVA000003992. Lectotype Nematus arcticus, here designated NORWAY – Svalbard • ♂; Green Harbour [Grønfjorden]; 78.04° N, 14.25° E; NHRS, NHRS-HEVA000006480. Host plants Salix glauca is the only recorded host, but probably other Salix spp. are also used. Genetics COI Only one sequence is available. The nearest neighbour, diverging by a minimum of 0.61%, is Euura caeruleocarpus. Nuclear Only one sequence is available, a female with haplotypes diverging by 0.39%. The nearest neighbour, diverging by a minimum of 0.5%, is Euura caeruleocarpus. Distribution and material examined Holarctic. Specimens studied are from Norway.