180 Euura nimbus (Benson, 1960)

Figs 198, 426

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.

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.

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 . – Kittilä Lapland • 1 ♀; Muonio, Pallastunturi; 68.100° N, 23.999° E; 1 Aug. 1951; J. Kaisila leg.; MZH, http://id.luomus.fi/GL.3402 .

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.