Euura bridgmanii - proxima group (formerly Pontania bridgmanii (Cameron, 1883))
See Liston et al (2017) for determination of adults. Within this group, males of Euura proxima, bridgmanii and triandrae cannot be separated.
Euura bridgmanii 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.
Jump to other group proxima species
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)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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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