Euura hedstroemi (Malaise, 1931)

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 : 187

261 Euura hedstroemi (Malaise, 1931)

Figs 280 , 483

Amauronematus variabilis var. hedstroemi Malaise, 1931b: 43 . Lectotype designated below.

Diagnosis

Females (4.5–6.0 mm) are not always distinguishable from E. tillbergi , and possibly from E. hulteni , E. vittata and E. minivittata sp. nov. Males might not be distinguishable from E. hulteni , E. vittata , and E. minivittata . Typically, the metafemur of females is more or less pale, without distinct black lines dorsally and ventrally; metatibia with a weak dark spot at about one third from base (not always recognizable); dorsal half of mesepisternum reddish; mesonotum extensively but not completely reddish; costa and pterostigma mostly yellowish or pale brown with costa usually centrally darker and pterostigma posteriorly dark-lined; abdominal terga 2–7 laterally (downturned parts) not completely black and usually not completely pale. Females are not green in life similar to E. tillbergi , but E. vittata (at least usually) has abdomen ventrally green in life. It is unclear whether E. hulteni and E. minivittata are green in life. Typically, E. vittata females have metafemur dorsally and ventrally black-lined and abdominal terga laterally more extensively pale than in E. hedstroemi . In addition, the mesepisternum is often completely pale in E. vittata females. Euura hulteni females usually have a dorsally and ventrally black-lined metafemur, and the mesepisternum (as well as mesonotum) is often darker than in E. hedstroemi . Euura minivittata females have a darker pterostigma (uniformly brown or centrally somewhat paler) and femora. Euura tillbergi females usually have a black mesepisternum and mesonotum, and darker abdomen (nearly completely black or apically extensively pale). Paler specimens of E. tillbergi do not have a posteriorly distinctly dark-lined pterostigma and the metatibia lacks a distinct dark spot on the basal third of tibia (as typical in E. hedstroemi ), but the latter character is not always reliable.

Type material examined

Lectotype Amauronematus variabilis var. hedstroemi , here designated

RUSSIA – Kamchatka oblast • ♀; Nischne-Kamtchatsk, Lake Azhabachye ; 56.166° N, 161.893° E; R. Malaise leg.; NHRS, NHRS-HEVA000006400 .

Host plants

Salix phylicifolia .

Genetics

COI

Based on 28 specimens, maximum within-species distance is 1.67% and the nearest neighbours, diverging by a minimum of 0%, are Euura vittata and E. hulteni . Specimens belong to BOLD:ABU6129.

Nuclear

Based on 28 specimens, maximum within-species distance is 0.47% (0.27% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.71%, is Euura vittata .

Distribution and material examined

Palaearctic. Specimens studied are from Finland, and Russia.

Figures

Figs 277–280. Lancets of Euura Newman, 1837. 277. lethe Prous & Liston, 2014 ZMUO.033742. 278. variabilis (Malaise, 1931), lectotype, ♀ NHRS-HEVA000006365. 279. tunicata (Zaddach, 1883) DEI-GISHym18903. 280. hedstroemi (Malaise, 1931) ZMUO.030878.

Figs 478–491. Penis valves of Euura Newman, 1837. 478. ampla (Konow, 1895) ZMUO.030818. 479. toeniata (Serville, 1823) DEI-GISHym31847. 480. toeniata ZMUO.030820. 481. obscuripes (Holmgren, 1883) DEI-GISHym84492. 482. obscuripes ZMUO.037203. 483. hedstroemi (Malaise, 1931) ZMUO.067447. 484. hulteni (Malaise, 1931) ZMUO.033760. 485. vittata (Serville, 1823) DEI-GISHym31870. 486. vittata DEI-GISHym84172. 487. minivittata Prous & Mutanen sp. nov. ZMUO.035848. 488. krausi (Taeger & Blank, 1998) ZMUO.031296. 489. tillbergi (Malaise, 1921) DEI-GISHym80836. 490. tillbergi ZMUO.030857. 491. tillbergi DEI-GISHym12036.