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
Status: Local
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)
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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