Euura arcticornis - viminalis group (formerly Pontania arcticornis)
See Liston et al (2017) for determination of adults. The host plant is an upland species.
Larvae feed on tea-leaved willow. The gall is in contact with the midrib, projecting only below the leaf-blade. The gall is often irregularly shaped, glabrous and yellow-green.
Size: Female: 3.0 - 4.9mm, male: 3.5 - 3.8mm
Distribution: England, Scotland, Ireland
Flight period: Univoltine
Plant associations: Salix phylicifolia (tea-leaved willow)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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