227 Euura stenogaster (Förster, 1854)

Figs 244, 465

Nematus stenogaster Förster, 1854a: 339–341 . Neotype designated by Schmidt (1997).

Nematus trifurcatus W.F. Kirby, 1882: 148–149 . Syntypes ♀♀ (BMNH), not examined. Type locality: Canada, Hudson Bay.

Amauronematus analis Konow, 1897: 178 . Lectotype designated by Schmidt (1997). Synonymy by Lindqvist (1972).

Amauronematus vescus MacGillivray, 1921b: 30 . Holotype ♀ (INHS), not examined. Type locality: USA, Maine, Orono.

Amauronematus veneficus MacGillivray, 1923b: 169 . Holotype ♀ (INHS), not examined. Type locality: USA, Alaska, Katmai.

Amauronematus festivus Saarinen, 1950b: 58–60 . Synonymy by Schmidt (1997).

Diagnosis

Its usually mostly black body and structure of its lancet (middle part ventrally concave and slightly convex apically, lamnium 1.2–1.6 times as long as radix) enables identification of the species.

Female

7.0– 8.9 mm (this study; Schmidt 1997). Pterostigma pale; tegula mostly pale; hind femur black; hind tibia black or partly pale; mesepisternum black or with weak pale markings; abdomen dorsally black, laterally and sometimes ventrally pale; valvula 3 black and narrow in dorsal view, usually asymmetrical in lateral view; lamnium 1.2–1.6 times as long as radix (neotype, DEI-GISHym4855, ZMUO.030855).

Type material examined

Neotype Nematus stenogaster

GERMANY • ♀; Berlin area; 52° N, 13° E; C. Schirmer leg.; ZSM, GBIF-GISHym3057.

Lectotype Amauronematus analis

RUSSIA – Irkutskaja oblast • ♂; Irkutsk; 52.29° N, 104.24° E; SDEI, GBIF-GISHym4091.

Holotype Amauronematus festivus

FINLAND – Häme • ♀; Loppi; 60.72° N, 24.44° E; 22 May 1943; A. Saarinen leg.; MZH, http://id.luomus.fi/GL.3367.

Host plants

Salix repens, S. aurita .

Genetics

COI

Based on 6 specimens, maximum within-species distance is 1.52% and the nearest neighbours, diverging by a minimum of 0%, are Euura histrio and E. tota .

Nuclear

Based on 5 specimens, maximum within-species distance is 0.66% (0.31% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.35%, is Euura histrio .

Distribution and material examined

Palaearctic. Specimens studied are from Finland, Germany, and Russia. The records from North America require confirmation.