Euura collactanea- viminalis group (formerly Pontania collactanea)
See Liston et al (2017) for determination of adults. The host plant is a coastal and heathland species.
Larvae feed on creeping willow. The gall is in contact with the midrib, projecting only below the leaf-blade. The gall is pea shaped, variably hairy or warty and tinged red to completely bright red.
Size: Female: 2.4 - 4.8mm, male: 2.9 - 4.9mm
Distribution: England, Scotland, Ireland
Flight period: Univoltine
Plant associations: Salix repens repens (creeping 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