Euura weiffenbachiella Liston & Vikberg, 2019

Euura weiffenbachiella - amerinae group (formerly Euura weiffenbachii Ermolenko: Kopelke (1996))

See Liston et al (2017) for determination of adults. The host plants are widespread species.

Larvae feed on shoots of purple willow and its hybrid with osier. This species causes the shoot to be clearly thickened and sometimes on one side causing the shoot to bend. Each shoot contains only one larva.

 

Size: Female: 4.6 - 5.5mm, male: approx. 3.6 - 6.1mm

Status: Rare

Distribution: Scotland, Ireland

Flight period: Univoltine

Plant associations: Salix purpurea and Salix purpurea x viminalis (purple willow and its hybrid with osier)

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