Euura nimbus ( Benson, 1960 )

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 : 126-127

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.15020956
persistent identifier	https://treatment.plazi.org/id/03BCA619-FFA5-D86C-975B-FBB3FB16FBD6
treatment provided by	Plazi (2025-03-03 10:25:10, last updated 2025-03-20 21:31:02)
scientific name	Euura nimbus ( Benson, 1960 )
status

Treatment

180 Euura nimbus ( Benson, 1960)

Figs 198 View Figs 195–198 , 426 View Figs 422–435

Amauronematus nimbus Benson, 1960: 177–179 .

Amauronematus lanceatus Hellén, 1970: 17–18 . Lectotype designated below. Syn. nov.

Diagnosis

Mostly black colouration, centrally pale brown pterostigma, and 20–23 serrulae of the lancet should usually enable identification of the females. Some specimens of E. sagmarius are almost as dark, but at least usually still seem to have partly pale or brownish mesepisternum (black in E. nimbus ). Males might not be clearly distinguishable from E. sagmarius . Based on nuclear genes there are two clusters of E. nimbus , but no clear morphological differences between them.

Type material examined

Holotype Amauronematus nimbus

SWITZERLAND – Valais • ♀; near Verbier ; 46.10° N, 7.23° E; 2440–2590 m a.s.l.; 27 Jun. 1959; J.E. and R.B. Benson leg.; BMNH, B.M.TYPEHYM.1.767 . GoogleMaps

Notes

Head more like DEI-GISHym19984, sawsheath in lateral view more like ZMUO.030875.

Lectotype Amauronematus lanceatus , here designated

FINLAND – Lapin Lääni • ♀; Kilpisjärvi; 69.04° N, 20.81° E; 23 Jun. 1963; O. Ranin leg.; MZH, http://id.luomus.fi/GL.3400. GoogleMaps

Paralectotypes Amauronematus lanceatus

FINLAND – Inari Lapland • 1 ♀; Utsjoki ; 69.91° N, 27.03° E; 20 Jun. 1960; O. Ranin leg.; MZH, http://id.luomus.fi/GL.3401 GoogleMaps . – Kittilä Lapland • 1 ♀; Muonio, Pallastunturi ; 68.100° N, 23.999° E; 1 Aug. 1951; J. Kaisila leg.; MZH, http://id.luomus.fi/GL.3402 GoogleMaps .

Notes

Best matches: DEI-GISHym19983, ZMUO.030875. A COI sequence (325 bp) of the lectotype (http://id.luomus.fi/ GL.3400) is identical to, e.g., DEI-GISHym84692 ( E. sagmarius ) and ZMUO.030875 ( E. nimbus ).

Host plants

Salix lanata and other grey willows.

Genetics

COI

Based on 19 specimens, maximum within-species distance is 2.45% and the nearest neighbour, diverging by a minimum of 0%, is Euura sagmarius .

Nuclear

Based on 16 specimens, maximum within-species distance is 1.31% (0.96% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.45%, is Euura sagmarius .

Distribution and material examined

Palaearctic. Specimens studied are from Finland, Norway, Sweden, and Switzerland.

References

Benson R. B. 1960. Some more high-alpine sawflies (Hymenoptera; Tenthredinidae). Mitteilungen der Schweizerischen Entomologischen Gesellschaft 33 (3): 173-182.

Hellen W. 1970. Die Nematinen Finnlands II (Hymenoptera, Tenthredinidae). Tribus Nematini: Gattung Amauronematus Konow. Notulae Entomologicae 50: 1-37.

Figures

Figs 195–198. Lancets of Euura Newman, 1837.195. miliaris (Panzer, 1797) PR.585VV.196. nigricornis (Serville, 1823) DEI-GISHym11483. 197. miltonota (Zaddach, 1883) DEI-GISHym18799. 198. nimbus (Benson, 1960) ZMUO.030875.

Figs 422–435. Penis valves of Euura Newman, 1837. 422. melanocephalus (Hartig, 1837) DEI- GISHym18642. 423. miliaris (Panzer, 1797) ZMUO.029496. 424. nigricornis? (Serville, 1823) Nr.18. 425. miltonota (Zaddach, 1883) DEI-GISHym13852. 426. nimbus (Benson, 1960) DEI-GISHym84209. 427. sagmarius (Konow, 1895) DEI-GISHym84692. 428. halo Prous, Liston & Mutanen sp. nov., paratype ZMUO.067421. 429. dissimilis (Förster, 1854) DEI-GISHym83932. 430. hypoxantha (Förster, 1854) DEI-GISHym3301. 431. jugicola (Thomson, 1871) DEI-GISHym88731 (Sweden). 432. jugicola DEI-GISHym15270 (Canada). 433. myosotidis (Fabricius, 1804) DEI-GISHym12003. 434. myosotidis ZMUO.058149. 435. platystigma (Lindqvist, 1949) DEI-GISHym83672.