Euura bridgmanii (Cameron, 1883)

Euura bridgmanii - proxima group (formerly Pontania bridgmanii (Cameron, 1883))

See Liston et al (2017) for determination of adults.

Larvae feed on a range of broad-leaved willows causing coffee bean shaped galls that transect the leaf blade but grow more on the upper surface. The galls are green and smooth but more or less pubescent.

 

Size: Female: 2.6 - 3.8mm, male: not examined

Status: Common

Distribution: England, Scotland, Wales, Ireland

Flight period: Uni- or bivoltine

Plant associations: Salix aurita, Salix caprea, Salix cinerea, Salix atrocinerea, Salix appendiculata and Salix phylicifolia (various broad-leaved willows)

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.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.

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