202 Euura aegra (Konow, 1895)

Figs 230, 454

Amauronematus aeger Konow, 1895: 181 . Lectotype designated by Oehlke & Wudowenz (1984). Amauronematus dalecarlicus Malaise, 1921a: 2–3 . Synonymy by Lindqvist (1962a).

Diagnosis

Mostly black, brown or pale pterostigma, “ Amauronematus - type ” head, bifid claws, square-shaped valvula 3 with distinct invagination. Most similar species is E. hebes (character states in parentheses), from which it differs by having smoother mesepisternum (usually strongly matt) and paler pronotum (completely black or nearly so). Males possibly not clearly distinguishable from other aegra group species. Females sometimes with extensively brown mesepisternum and head (e.g., ZMUO.031774, ZMUO.031807).

Type material examined

Lectotype Amauronematus aeger

GERMANY • ♀; Thüringen; SDEI, GBIF-GISHym4086.

Holotype Amauronematus dalecarlicus

SWEDEN – Dalarna • ♀; Säter; 60.312° N, 15.524° E; E.Klefbeck leg.; NHRS, NHRS-HEVA000003833.

Host plants

Betula pubescens . According to Kangas (1985) also B. pendula .

Genetics

COI

Based on 6 specimens, maximum within-species distance is 3.5% and the nearest neighbour, diverging by a minimum of 0%, is Euura lindqvisti .

Nuclear

Based on 6 specimens, maximum within-species distance is 0.14% (0.29% based on haplotypes of individual females). The nearest neighbour, diverging by a minimum of 0.2%, is Euura lindqvisti .

Distribution and material examined

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