Euura pallescens ( 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 : 139-140

publication ID	https://doi.org/10.5852/ejt.2025.977.2799
publication LSID	lsid:zoobank.org:pub:73DA044B-EB3D-4BF1-97EA-7430036DEEE0
DOI	https://doi.org/10.5281/zenodo.15020992
persistent identifier	https://treatment.plazi.org/id/03BCA619-FF52-D899-9751-F9DDFB9AFA9C
treatment provided by	Plazi (2025-03-03 10:25:10, last updated 2025-03-20 21:31:02)
scientific name	Euura pallescens ( Hartig, 1837 )
status

Treatment

196 Euura pallescens ( Hartig, 1837)

Figs 211 View Figs 210–212 , 442 View Figs 436–449

Nematus pallescens Hartig, 1837: 216 . Lectotype designated below.

Nematus olivaceus Thomson, 1871: 120–121 . Lectotype designated below. Synonymy by Konow (1890).

Nematus ruficeps Zaddach, 1883 in Brischke 1883: 131. Holotype ♀, probably destroyed ( Blank & Taeger 1998). Type locality: Denmark, Sonderburg. Synonymy by Konow (1890).

Nematus pachycerus Borries, 1896: 232–233 . Syntypes ♀ ♂, not located, possibly destroyed. Type locality: Denmark, Dyrehaven. Synonymy by Blank et al. (2009).

Diagnosis

Females are typically nearly completely pale, males dorsally extensively black. Pale mesepisternum, mesepimeron, hind tibia and femur should enable separation of the species from the others in the group. The distinctly apically inclined basalmost suture of the lancet also distinguishes the females from the other two species (basalmost suture more or less straight). Penis valves are most similar to E. styx . Ventroapical lobe of paravalva is more or less symmetrical in E. pallescens , but asymmetrical (dorsally straight and ventrally convex) in E. styx .

Type material examined

Lectotype Nematus pallescens , here designated

GERMANY – Niedersachsen • ♀; Harz; 51.8° N, 10.3° E; W. Saxesen leg.; ZSM, GBIF-GISHym3373 . GoogleMaps

Lectotype Nematus olivaceus , here designated

SWEDEN – Skåne • ♀; Wittsjö [Vittsjö]; 56.35° N, 13.66° E;in coniferous forest; MZLU, MZLU2017280 About MZLU . GoogleMaps

Host plants

Picea abies . One generation per year.

Genetics

COI

Based on 5 specimens, maximum within-species distance is 1.37% and the nearest neighbour, diverging by a minimum of 0%, is Euura montana .

Nuclear

Based on 5 specimens, maximum within-species distance is 0.36% (0.12% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.6%, is Euura pallescens group specimen DEI-GISHym80693 (looks like E. montana , lancet Fig. 213 View Figs 213–215 ) from Primorsky Krai, Russia.

Distribution and material examined

Palaearctic. Specimens studied are from Finland, Germany, and Sweden.

References

Blank S. M., Taeger A., Liston A. D., Smith D. R., Rasnitsyn A. P., Shinohara A., Heidemaa M. & Viitasaari M. 2009. Studies toward a World Catalog of Symphyta (Hymenoptera). Zootaxa 2254: 1-96. https://doi.org/10.11646/zootaxa.2254.1.1

Borries H. 1896. Naaletraeernes Bladhvepse. Entomologiske Meddelelser 5: 201-283. Available from https://www.biodiversitylibrary.org/page/12061074 [accessed 20 Nov. 2024].

Brischke C. G. A. 1883. Beobachtungen uber die Arten der Blatt- und Holzwespen von C. G. A. Brischke, Hauptlehrer a. D. in Langfuhr und Dr. Gustav Zaddach Professor in Konigsberg, mitgetheilt von Brischke aus Zaddach's Manuscripten. Schriften der physikalisch-okonomischen Gesellschaft zu Konigsberg 23: 127-200. Available from https://www.biodiversitylibrary.org/page/14731019 [accessed 20 Nov. 2024].

Hartig T. 1837. Die Aderflugler Deutschlands mit besonderer Berucksichtigung ihres Larvenzustandes und ihres Wirkens in Waldern und Garten fur Entomologen, Wald- und Gartenbesitzer. Die Familien der Blattwespen und Holzwespen nebst einer allgemeinen Einleitung zur Naturgeschichte der Hymenopteren. Haude und Spenersche Buchhandlung, Berlin.

Konow F. W. 1890. Catalogus Tenthredinidarum Europae. (Hymenopterorum XVI familiae.). Deutsche Entomologische Zeitschrift 1890 (2): 241-255. Available from https://www.biodiversitylibrary.org/page/33176591 [accessed 20 Nov. 2024].

Taeger A. & Blank S. M. 1998. Beitrag zur Kenntnis einiger Nematinae (Hymenoptera: Tenthredinidae). In: Taeger A. & Blank S. M. (eds) Pflanzenwespen Deutschlands (Hymenoptera, Symphyta). Kommentierte Bestandsaufnahme: 247-277. Goecke & Evers, Keltern.

Thomson C. G. 1871. Hymenoptera Scandinaviae - Tenthredo et Sirex Lin. H. Olsson, Lundae.

Figures

Figs 210–212. Lancets of Euura Newman, 1837. 210. montana (Zaddach, 1883) DEI-GISHym84263. 211. pallescens (Hartig, 1837) DEI-GISHym12526. 212. styx (Benson, 1958), holotype, ♀ B.M.TYPEHYM.1.791.

Figs 436–449. Penis valves of Euura Newman, 1837. 436. semiopaca (Lindqvist, 1958) DEI- GISHym88881. 437. semiopaca? PR.566VV. 438. tibialis (Newman, 1837) DEI-GISHym12515. 439. frenalis (Thomson, 1888) DEI-GISHym12057.440. oligospila (Förster, 1854) DEI-GISHym21395. 441. montana (Zaddach, 1883) DEI-GISHym84264.442. pallescens (Hartig, 1837) DEI-GISHym12148. 443. styx (Benson, 1958) http://id.luomus.fi/NG.1551. 444. styx paratype. 445. papillosa (Retzius, 1783) ZMUO.040796. 446. pavida (Serville, 1823) DEI-GISHym83970. 447. pavida ZMUO.030817. 448. amentorum (Förster, 1854) http://id.luomus.fi/GP.110189. 449. dahlbomi (Thomson, 1871) http://id.luomus.fi/GP.110190.

Figs 213–215. Lancets of Euura Newman, 1837. 213. pallescens group sp. DEI-GISHym80693. 214. gracilidentata (Viitasaari, 1980) DEI-GISHym12504. 215. leucotrocha (Hartig, 1837) DEI- GISHym17610.