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.