Euura leucapsis (Tischbein, 1846)

Euura leucapsis - oblita group (formerly Phyllocolpa leucapsis and conspecific Phyllocolpa alienata)

Phyllocolpa leucapsis, alienata and Pontania coriacea are all now considered to be one species. The species shows some variability in colour. See Liston et al (2017) for determination.

Larvae feed on grey willow, eared willow and atypically on downy willow. The larvae cause a leaf fold, either spirally twisted or a marginal fold.

 

Size: Female: 3.1 - 4.1mm, male: 3.3 - 3.8mm

Status: Widespread

Distribution: England, Scotland, Wales, Ireland

Flight period: Uni- or bivoltine, May to August

Plant associations: Salix cinerea, Salix aurita and atypically on Salix lapponum (grey willow, eared willow and atypically on downy 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