Group dolichura

Description follows Liston et al, 2017. This group forms willow galls on the upper-side of a leaf. The galls are elongate bean galls that are often in paired either side of the mid-vein. In Britain the hostplant willows have a predominantly northern and upland distribution. Although often monophagous within a local range, species in this group may feed on a particular section of willow species. The dolichura species are all univoltine. The characteristics of the group are as follows. The mandibles are asymmetric with the right one being evenly tapered and the left narrowing rapidly from the base to a narrow blade-like apex. The cross vein 2r-m is usually present on the forewing submarginal cells. The supraclypeal region is densely haired and the antennae are moderately long.  The antennal hollows are covered with silky hairs and are entirely dull. The penis valve of the males lacks any small spines ventrally. The female has comparatively long cerci that are about six times the breadth and reach back to the apex of the sawsheath.

Species list:

Euura dolichura (Thomson, 1871) = Pontania dolichura (Thomson, 1871)

Euura femoralis (Cameron, 1876) = Pontania femoralis (Cameron, 1876)

Euura nigricantis (Kopelke, 1986) = Pontania nigricantis Kopelke, 1986

References:

Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168

Liston, A.D., Heibo, E., Prous, M., Vårdal, H., Nyman, T. and Vikberg, V., 2017. North European gall-inducing Euura sawflies (Hymenoptera, Tenthredinidae, Nematinae). Zootaxa, 4302(1), pp.1-115.