Euura gehrsi (Konow, 1903)

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 : 59-60

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.15020813
persistent identifier	https://treatment.plazi.org/id/03BCA619-FFE2-D829-9745-F9A4FAB0FBDE
treatment provided by	Plazi (2025-03-03 10:25:10, last updated 2025-03-20 21:31:02)
scientific name	Euura gehrsi (Konow, 1903)
status

Treatment

115 Euura gehrsi (Konow, 1903)

Figs 104 View Figs 101–104 , 338 View Figs 338–351

Pachynematus gehrsi Konow, 1903a: 381 (key). Lectotype designated by Taeger & Blank (1998). Pachynematus freyi Lindqvist, 1949: 81–82 . Lectotype designated below. Syn. nov.

Diagnosis

Most similar to E. annulata but generally darker. Serrulae and setae of the saw of E. annulata may be more prominent than in E. gehrsi . Males are more clearly distinguishable because of large differences in colouration ( E. annulata males are extensively pale while E. gehrsi is mostly black). Also, the paravalva of the penis valve of E. annulata possibly narrows basally more abruptly compared to E. gehrsi .

Type material examined

Lectotype Pachynematus gehrsi

GERMANY – Thüringen • ♀; Ohrdruf ; 50.81° N, 10.74° E; 9 Jun. 1890; A. Frank leg.; SDEI, DEIGISHym12498 . GoogleMaps

Lectotype Pachynematus freyi , here designated

FINLAND – Inari Lapland • ♀; Utsjoki, Outakoski; 69.61° N, 25.98° E; 25 Jun. 1947; E. Lindqvist leg.; MZH, http://id.luomus.fi/GL.2448. GoogleMaps

Host plants

Bistorta officinalis Delarbre ( Macek et al. 2020; rearings by Alexey Zinovjev) and probably also Bistorta vivipara , because B. officinalis is not present in northern Fennoscandia.

Genetics

COI

Based on 5 specimens, maximum within-species distance is 3.5% and the nearest neighbour, diverging by a minimum of 0.61%, is Euura annulata .

Nuclear

Based on 5 specimens, maximum within-species distance is 0.61% (0.47% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.5%, is Euura annulata .

Distribution and material examined

Palaearctic. Specimens studied are from Finland, France, Germany, Norway, Russia, and Sweden.

References

Konow F. W. 1903 a. Revision der Nematiden-Gattung Pachynematus Knw. (Hym.). Zeitschrift fur systematische Hymenopterologie und Dipterologie 3 (6): 377-383. Available from https://www.biodiversitylibrary.org/page/13746947 [accessed 20 Nov. 2024].

Lindqvist E. 1949. Neue nordische Blattwespen. Notulae Entomologicae 28 [1948]: 65-86.

Macek J., Roller L., Benes K., Holy K. & Holusa J. 2020. Blanokridli Ceske a Slovenske republiky II. Siropasi. Academia, Praha.

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.

Figures

Figs 101–104. Lancets of Euura Newman, 1837. 101. monticola (Thomson, 1871) PR.565VV. 102. perkioemaekii (Lindqvist, 1960) comb. nov. DEI-GISHym84260. 103. annulata (Gimmerthal, 1834) Prep.306.OR. 104. gehrsi (Konow, 1903) DEI-GISHym83930.

Figs 338–351. Penis valves of Euura Newman, 1837. 338. gehrsi (Konow, 1903) DEI-GISHym84687. 339. infirma (Förster, 1854) DEI-GISHym20732. 340. taegeri (Lacourt, 1996) DEI-GISHym12669. 341. bipartita (Serville, 1823) DEI-GISHym31236. 342. bipartita ZMUO.035732. 343. bipartita ZMUO.041907. 344. monticola (Thomson, 1871) PR.564VV. 345. perkioemaekii (Lindqvist, 1960) comb. nov. ZMUO.039249. 346. caucasica (Liston, Taeger & Blank, 2009) DEI-GISHym12542. 347. fuscomaculata (Förster, 1854) DEI-GISHym12492. 348. fuscomaculata DEI-GISHym31250. 349. fuscarima (Benson, 1933) comb. nov. Ex-Nr.179103. 350. connecta (Lindqvist, 1958) ZMUO.067317. 351. leucopyga (Lindqvist, 1949) DEI-GISHym84254.