Euura subgemma Liston, 2006

Liston, Andrew D., Heibo, Erik, Prous, Marko, Vårdal, Hege, Nyman, Tommi & Vikberg, Veli, 2017, North European gall-inducing Euura sawflies (Hymenoptera, Tenthredinidae, Nematinae), Zootaxa 4302 (1), pp. 1-115 : 65

Euura subgemma Liston, 2006

Euura subgemma Liston, 2006: 248 . Described: ♀. Holotype, ♀, SDEI [examined]. Type locality: Germany, Brandenburg, Niederfinow.

Euura laeta: Jörgensen 1906a , Tullgren 1919, Coulianos & Holmåsen 1991, Kopelke 2001; misidentification.

Notes on types and taxonomy. See above, under E. laeta .

Variability. Female: Body length: 4.4–5.5mm. Male: 4.0– 4.5mm. Female and male: no significant variability in specimens examined. Total number of specimens examined: 31.

Genetic data. A single specimen, from Leningrad oblast, Russia, has been sequenced. There is marked divergence from other species of the mucronata subgroup so far sampled, but no sequence data are available for E. laeta .

Similar species. Female; particularly similar in external morphology and colouration to E. laeta , which also has S. viminalis as a host, but their lancets are substantially different, and the body lengths of each fall in two discrete ranges which do not overlap (see key). Male; not distinguishable from other nominal taxa in the mucronata subgroup.

Bionomics. Host plant: Salix viminalis (Taeger et al. 2006) . Biology: Křístek (1972), Tullgren (1919), Urban (1995).

Distribution. Central and North Europe, north to Uppland in Sweden (Taeger et al. 2006, Haris 2009) and Leningrad oblast in Russia. Occurrence in Sweden: has caused damage in cultivated stands of basket willow ( Tullgren 1919). Published records: Skåne, Öland, Uppland ( Coulianos & Holmåsen 1991). Material examined: Skåne, Uppland.