Euura amerinae - amerinae group
See Liston et al (2017) for determination of adults. The main host plant is a widespread species.
Larvae feed on shoots of bay willow causing a large walnut shaped gall to form on one side of the shoot, often bent and containing several larvae.
Size: Female: 3.5 - 5.1mm, male: 3.8 - 6.0mm
Distribution: England, Scotland, Ireland
Flight period: Univoltine
Plant associations: Salix pentandra (bay 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