Euura viminalis- viminalis group (formerly Pontania viminalis)
See Liston et al (2017) for determination of adults. The host plant is widespread.
Euura viminalis larvae feed on purple willow. The gall is in contact with the midrib, projecting only below the leaf-blade. The pea shaped gall is glabrous, often very warty and green blushed with red.
Size: Female: 2.9 - 5.4mm, male: 2.8 - 4.7mm
Distribution: England, Scotland, Wales, Ireland
Flight period: Bivoltine
Plant associations: Salix purpurea (purple 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