Euura squamicauda ( Vikberg, 1982 )

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 : 112

164 Euura squamicauda ( Vikberg, 1982)

Figs 167 , 392

Pteronidea caudalis Lindqvist, 1968: 194 . Secondary homonym of Nematus caudalis Eversmann, 1847 [= Euura leucotrocha ( Hartig, 1837) ].

Nematus squamicauda Vikberg, 1982: 63 . Replacement name for Pteronidea caudalis Lindqvist, 1968 .

Diagnosis

Females (5.5–6.5 mm) are externally very similar to darker specimens of E. lienterica and many species in the bipartita group, but valvula 3 is orientated distinctly dorsally. Separation of males from darker specimens of the other flavescens group species is not clear. Contrary to the original description, the pterostigma is hardly bicolored.

Type material examined

Holotype Pteronidea caudalis

SWEDEN – Torne Lappmark • ♀; Torneträsk; 68.22° N, 19.74° E; 400 m a.s.l.; R. Malaise leg.; NHRS, NHRS-HEVA000003965 .

Host plants

Salix lanata L. based on three females (two of them sequenced) ovipositing in the male catkins. A sequenced larva (ZMUO.042092) was collected from Salix sp. where S. lanata was present.

Genetics

COI

Based on 5 specimens, maximum within-species distance is 0.15% and the nearest neighbour, diverging by a minimum of 5.47%, is Euura dorsata .

Nuclear

Based on 5 specimens, maximum within-species distance is 0.13% (0.2% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 1.65%, is Euura reticulata .

Distribution and material examined

Palaearctic. Specimens studied are from Finland, Norway, and Sweden.

Figures

Figs 166–169. Lancets of Euura Newman, 1837. 166. flavescens (Stephens, 1835) DEI-GISHym21336. 167. squamicauda (Vikberg, 1982) 201172_QJB. 168. amerinae (Linnaeus, 1758) DEI-GISHym31742. 169. atra (Jurine, 1807) DEI-GISHym31744.

Figs 380–393. Penis valves of Euura Newman, 1837. 380. lichtwardti (Konow, 1903) DEI- GISHym84256. 381. moerens (Förster, 1854) DEI-GISHym84252. 382. obducta (Hartig, 1837) DEI- GISHym84481. 383. fahraei (Thomson, 1863) http://id.luomus.fi/GL.3496. 384. tenuiserra (Lindqvist, 1944) DEI-GISHym80664. 385. dorsata (Cameron, 1875) ZMUO.031338. 386. flavescens (Stephens, 1835) DEI-GISHym84191. 387. latibasis (Lindqvist, 1949) ZMUO.035676. 388. lienterica (Holmgren, 1883) DEI-GISHym88729. 389. pravus (Konow, 1895) ZMUO.031418. 390. reticulata (Holmgren, 1883) DEI-GISHym88880. 391. seriepunctata (Malaise, 1921) ZMUO.035721. 392. squamicauda (Vikberg, 1982) 210004_VMZ. 393. serela Prous & Mutanen sp. nov., paratype ZMUO.028330.