Euura obducta ( Hartig, 1837 )

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 : 96

145 Euura obducta ( Hartig, 1837)

Figs 145 , 382

Nematus obductus Hartig, 1837: 201–202 . Lectotype designated below.

Nematus conductus Ruthe, 1859: 305–306 . Lectotype designated below. Synonymy by Konow (1904c).

Nematus graminis Cameron, 1874: 221–222 . Syntypes ♀♀ (BMNH), not examined. Type localities: United Kingdom, Scotland, Glasgow and Aberdeen areas; England, Saint Albans. Synonymy by Konow (1904c).

Nematus palliventris Cresson, 1880: 5 . Holotype ♀ (ANSP Type no. 388, ANSP), not examined. Type locality: USA, Nevada.

Pachynematus boulderensis Rohwer, 1920: 218–219 . Holotype ♀ (USNMENT00778746, USNM, http://n 2t.net/ark:/65665/3a7fb89a5-6012-4196-a47e-01edac6000c2), not examined. Type locality: USA, Colorada , Boulder.

Diagnosis

The female is most similar to E. vaga , from which it differs by its apically or extensively black-marked metafemur (nearly always completely pale in E. vaga ), more elongate valvula 3 in dorsal view, and more or less straight basal part of lamnium (curved outward in E. vaga ). Also, the pterostigma is black in E. obducta , but pale in European specimens of E. vaga . Males, which are extremely rare, are best recognised by penis valves. The tergum 8 is deeply invaginated in the middle and the prominent apical projection is distinctly constricted at base, which enables identification of males also externally.

Type material examined

Lectotype Nematus obductus , here designated

GERMANY [according to the title of Hartig 1837] • ♀; ZMHB, GBIF-GISHym2785 .

Lectotype Nematus conductus , here designated

ICELAND • ♀; 1856; Staudinger leg.; ZMHB, dbcac8 / ZMHB, GBIF-GISHym2829 .

Host plants

Various genera of Poaceae , such as Poa L., Elymus L., Phleum L. and Dactylis L. ( Kangas 1985; own data), and Carex ( Macek et al. 2020) .

Genetics

COI

Based on 9 specimens, maximum within-species distance is 2.89% and the nearest neighbour, diverging by a minimum of 7.26%, is Euura clitellata .

Nuclear

Only one sequence available, a female with haplotypes diverging by 0.1%. The nearest neighbour, diverging by a minimum of 2.89%, is Euura fallax .

Distribution and material examined

Holarctic. Specimens studied are from Austria, Canada, Estonia, Finland, France, Germany, Greenland (only genetics), Iceland, Portugal, Sweden, Switzerland, and the United Kingdom.

Figures

Figs 142–145. Lancets of Euura Newman, 1837. 142. fallax (Serville, 1823) DEI-GISHym16232. 143. lichtwardti (Konow, 1903) EI-GISHym84226. 144. moerens (Förster, 1854) DEI-GISHym21044. 145. obducta (Hartig, 1837) DEI-GISHym19628.

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.