Euura moerens (Förster, 1854)

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 : 94-95

144 Euura moerens (Förster, 1854)

Figs 144 , 381

Nematus moerens Förster, 1854a: 294–295 . Lectotype designated below.

Nematus pygostolus Förster, 1854b: 431–432 . Lectotype designated by Weiffenbach (1962). Synonymy by Weiffenbach (1962).

Nematus pleuralis Thomson, 1863: 628 . Lectotype designated below. Synonymy by Enslin (1916a).

Pachynematus pullus Konow, 1903a: 379 (key). Lectotype designated below. Synonymy by Lindqvist (1976).

Pachynematus falonus Ross, 1945: 108 (key). Holotype ♂ (INHS), not examined. Type locality: Canada, Alberta, Edmonton.

Pachynematus torridonensis Liston, 1980b: 52–53 . Synonymy by Liston (1995).

Diagnosis

Females are most similar to E. lichtwardti . Metatarsomere 1 and metafemur are usually extensively pale in E. moerens , but usually completely or nearly completely black E. lichtwardti . In males, the apical projection of tergum 8 is absent or indistinct unlike most other Euura (thus more like most Pristiphora ). Penis valves reliably separate E. moerens from the other species.

Type material examined

Lectotype Nematus moerens , here designated

GERMANY – Nordrhein-Westfalen • ♀; Aachen area ; 50.77° N, 6.09° E; ZSM, DEI-GISHym88919 .

Notes

According to Taeger & Blank (1998) the lectotype was designated by Haris (1997), but no such designation was made.

Lectotype Nematus pygostolus

GERMANY – Nordrhein-Westfalen • ♂; Aachen area ; 50.77° N, 6.09° E; ZSM, DEI-GISHym12488 .

Lectotype Nematus pleuralis , here designated

SWEDEN • ♀; Stockholm; 59.31° N, 18.04° E; C.H. Boheman leg.; NHRS, NHRS-HEVA000006326 .

Lectotype Pachynematus pullus , here designated

FRANCE – Champagne-Ardenne • ♀; Charleville-Mézières ; 49.76° N, 4.72° E; 11 May 1895; SDEI, GBIF-GISHym3882 .

Holotype Pachynematus torridonensis

UNITED KINGDOM – Scotland • Wester Ross, Coire MhicNobuil, near Allt Toll a’Mhaidaich ; 57.57° N, 5.56° W; 150 m a.s.l.; 16 May 1978; A.D. Liston leg.; RSME.

Host plants

Calamagrostis arundinacea (L.) Roth ( Kangas 1985), Poa sp. and Festuca sp. ( Macek et al. 2020).

Genetics

COI

Based on 8 specimens, maximum within-species distance is 6.75% and the nearest neighbour, diverging by a minimum of 0.97%, is Euura clitellata .

Nuclear

Based on 7 specimens, maximum within-species distance is 0.23% (0.35% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 1.38%, is Euura fallax .

Distribution and material examined

Holarctic. Specimens studied are from Finland, France, Germany, Norway, Sweden, 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.