Euura brevicornis - viminalis group (formerly Pontania brevicornis)
Added to the British list by Liston in 2012. However, those specimens have now been re-identified as Euura pendunculi (Liston et al, 2017) and this species is now removed from the British list. See Liston et al (2017) for determination of adults.
Euura brevicornis larvae feed on common sallow, and its hybrid with goat willow, and rarely on eared willow. The gall is in contact with the midrib, projecting only below the leaf-blade. The gall is pea shaped, noticeably hairy and yellow-green.
Jump to other group viminalis species
Size: Female: 3.2 - 4.6mm, male: 2.8 - 4.8mm
Status: Probably absent
Distribution: No Records
Flight period: Univoltine
Plant associations: Salix cinerea, Salix cinerea x caprea and rarely on Salix aurita (common sallow and its hybrid with goat willow and rarely on eared willow)
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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