Euura stordalensis ( Strand, 1905 )

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 : 173-174

244 Euura stordalensis ( Strand, 1905)

Figs 263 , 473

Nematus stordalensis Strand, 1905: 7–8 . Lectotype designated by Vikberg (1970a).

Nematus marginifer Strand, 1905: 8 . Synonymy by Benson (1962).

Amauronematus cogitatus MacGillivray, 1919: 15–16 . Synonymy by Benson (1962).

Amauronematus speciosus Hellén, 1951b: 106–107 . Lectotype designated by Vikberg (1970a). Syn. nov.

Diagnosis

Closely related to E. opacipleuris , see differences mentioned under that species.

Type material examined

Lectotype Nematus stordalensis

CANADA – Ellesmere Island • ♀; Havnefjorden, Havnen; 77.9° N, 81.7° W; 18 Jun. 1900; ZMUN, NHMO:1000200592 / PR316VV.

Notes

Length 6.7 mm. Best morphological match is N13682 (about 6 mm and slightly darker).

Holotype Nematus marginifer

CANADA – Ellesmere Island • ♂; Beistadfjorden (Bunden av Kjödfjorden); 77.9° N, 81.7° W; 9 Jun. 1899; Simmons leg.; ZMUN, NHMO:1000199953 / PR317VV.

Notes

Penis valve ( Vikberg 1970a: fig. 7) not distinguishable from European specimens (e.g., DEIGISHym12097).

Holotype Amauronematus cogitatus

USA – Alaska • ♀; Demarcation Point ; 69.648° N, 141.233° W; 14 May 1914; F. Johansen leg.; emerged from cocoon 23 Jun. 1914; CNC, CNC1056982 .

Lectotype Amauronematus speciosus

FINLAND – Kittilä Lapland • ♀; Muonio, Pallastunturi; 68.100° N, 23.999° E; 22 Jun. 1942; W. Hellén leg.; MZH, http://id.luomus.fi/GL.2762.

Host plants

Salix herbacea and possibly other dwarf willows.

Genetics

COI

Based on 9 specimens, maximum within-species distance is 1.67% and the nearest neighbours, diverging by a minimum of 0%, are Euura rufa , E. schlueteri , and E. striata .

Nuclear

Based on 8 specimens, maximum within-species distance is 0.76% (0.69% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.36%, is Euura opacipleuris .

Distribution and material examined

Holarctic. Specimens studied are from Canada, Finland, Norway, and the USA.

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.