Euura pedunculi (Hartig, 1837)

Euura pedunculi - viminalis group (formerly Pontania pedunculi)

See Liston et al (2017) for determination of adults. The host plant is widespread.

Euura pedunculi 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)

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