Euura pedunculi - viminalis group (formerly Pontania pedunculi)
See Liston et al (2017) for determination of adults. The host plant is widespread.
Larvae feed on eared willow, goat willow and its hybrid with tea-leaved willow. The gall is in contact with the midrib, projecting only below the leaf-blade. The pea shaped gall is variably hairy, often warty and green often flushed with red.
Size: Female: 2.5 - 4.3mm, male: 2.8 - 3.7mm
Status: Common
Distribution: England, Scotland, Ireland
Flight period: Univoltine
Plant associations: Salix aurita, Salix caprea and Salix caprea x phylicifolia (eared willow, goat willow and its hybrid with tea-leaved 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