Euura villosa ( Thomson, 1863 )

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), European Journal of Taxonomy 977, pp. 1-377 : 84-85

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.

Figures

Figs 134–137. Lancets of Euura Newman, 1837.134. lipovskyi (D.R. Smith, 1974) DEI-GISHym21049. 135. caeruleocarpus (Hartig, 1837) DEI-GISHym21380. 136. villosa (Thomson, 1863) DEI- GISHym88925. 137. clibrichella (Cameron, 1878) DEI-GISHym83669.

Figs 366–379. Penis valves of Euura Newman, 1837. 366. declinata (Förster, 1854), holotype? (Conde unpubl.). 367. declinata DEI-GISHym17598. 368. scotonota (Förster, 1854) DEI-GISHym12002. 369. scotonota W18212. 370. lipovskyi (D.R. Smith, 1974) DEI-GISHym84702. 371. caeruleocarpus (Hartig, 1837) DEI-GISHym88914. 372. villosa (Thomson, 1863), Nematus arcticus Holmgren, 1869, lectotype NHRS-HEVA000006480. 373. clibrichella (Cameron, 1878) DEI-GISHym84184. 374. clitellata group sp. 1 ZMUO.035580. 375. clitellata (Serville, 1823) ZMUO.030824. 376. clitellata cluster 3 ZMUO.030823. 377. clitellata cluster 4 DEI-GISHym84255. 378. clitellata cluster 5 ZMUO.059059. 379. fallax (Serville, 1823) DEI-GISHym84275.