Euura variator ( Ruthe, 1859 )

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 : 185-186

259 Euura variator ( Ruthe, 1859)

Figs 266–267 , 476–477

Nematus variator Ruthe, 1859: 308–310 . Lectotype designated below.

Amauronematus godmani Benson, 1955: 104–105 . Syn. nov.

Amauronematus galbiventris Lindqvist, 1960a: 130 . Syn. nov.

Amauronematus longidens Lindqvist, 1962b: 13 . Synonymy by Hellén (1970).

Diagnosis

Females are most similar to E. fasciata and E. obscuripes ( toeniata group); see differences discussed under these species. Males might not always be distinguishable from those of the E. obscuripes ( toeniata group) and vittata group specimens found in the same (sub)arctic habitats.

Female

5.0– 7.5 mm. Tegula pale or sometimes mostly black, metafemur usually completely or mostly pale, sometimes mostly black, abdomen ventrally extensively pale.

Male

4.0–6.0(6.5) mm. Tegula and metafemur black or partly pale, subgenital plate pale or sometimes black.

Best matches to godmani : ZMUO.044556 (female), ZMUO.059873, ZMUO.058922 (males).

Type material examined

Lectotype Nematus variator , here designated

ICELAND • ♀; Staudinger leg.; ZMHB, http://coll.mfn-berlin.de/u/dbcac6 / GBIF-GISHym2822 .

Paralectotype Nematus variator

ICELAND • 1 ♀; same data as for preceding; SDEI, GBIF-GISHym4103 .

Notes

GBIF-GISHym2822 is 6.5 mm long; GBIF-GISHym4103 is 7.7 mm long.

Holotype Amauronematus godmani

SWITZERLAND – Valais • ♀; Ferpècle [Glacier]; 2100–2400 m a.s.l.; 22 Jun. 1935; J.E. and R.B. Benson leg,; BMNH, B.M.TYPEHYM.1.688 .

Notes

ZMUO.044556 is nearly a perfect morphological match.

Holotype Amauronematus galbiventris

SWEDEN – Torne Lappmark • ♀; Abisko; 68.35° N, 18.83° E; 17–22 Jun. 1954; J.E. and R.B. Benson leg.; BMNH, B.M.TYPEHYM.1.785 .

Notes

Length 6.5 mm.

Holotype Amauronematus longidens

FINLAND – Inari Lapland • 1 ♀; Utsjoki; 69.91° N, 27.03° E; 16 Jun. 1960; O. Ranin leg.; MZH, http://id.luomus.fi/GL.3412.

Notes

Length 5.5 mm.

Host plants

Salix glauca , S. helvetica Vill. , S. lapponum , S. reticulata .

Genetics

COI

Based on 35 specimens, maximum within-species distance is 4.56% and the nearest neighbours, diverging by a minimum of 0%, are Euura opacipleuris , E. fasciata , and E. semilactea .

Nuclear

Based on 30 specimens, maximum within-species distance is 0.98% (0.62% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.37%, is Euura semilactea .

Distribution and material examined

Palaearctic. Specimens studied are from Austria, Finland, Iceland, Norway, Sweden, and Switzerland.

Figures

Figs 263–267. Lancets of Euura Newman, 1837. 263. stordalensis (Strand, 1905) PR.325VV. 264. fasciata (Konow, 1897) DEI-GISHym18784. 265. semilactea (Zaddach, 1883) PR.334VV. 266. variator (Ruthe, 1859) DEI-GISHym21334. 267. variator DEI-GISHym21418.

Figs 464–477. Penis valves of Euura Newman, 1837. 464. septentrionalis (Saarinen, 1950) DEI- GISHym12060. 465. stenogaster (Förster, 1854) ZMUO.030816. 466. striata (Hartig, 1837) DEI- GISHym84228. 467. striata DEI-GISHym84233. 468. striata ZMUO.058015. 469. tenuis (Schmidt, 1997) ZMUO.045038. 470. tota (Saarinen, 1950) DEI-GISHym84216. 471. histrio group sp. ZMUO.067381. 472. opacipleuris (Konow, 1895) DEI-GISHym12562. 473. stordalensis (Strand, 1905) DEI-GISHym12097. 474. fasciata (Konow, 1897) DEI-GISHym80666. 475. semilactea (Zaddach, 1883) DEI-GISHym12371. 476. variator (Ruthe, 1859) DEI-GISHym83701. 477. variator DEI- GISHym84189.