Euura collactanea- viminalis group (formerly Pontania collactanea)

See Liston et al (2017) for determination of adults. The host plant is a coastal and heathland species. Within this group, males of Euura aquilonis, crassipes, collectanea, myrsiniticola, pedunculi, saliciscinereae, samolad, viminalis, herbaceae and arbusculae are inseparable.

Euura collactanea larvae feed on Creeping Willow. The gall is in contact with the midrib, projecting only below the leaf-blade. The gall is pea shaped, variably hairy or warty and tinged red to completely bright red.

Jump to other group viminalis species

Size: Female: 2.4 - 4.8mm, male: 2.9 - 4.9mm

Status: Local

Distribution: England, Scotland, Ireland

Flight period: Univoltine

Plant associations: Salix repens repens (Creeping 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