Euura myrsiniticola - Whortle-leaf Pea-galler
viminalis
group (formerly Pontania myrsiniticola)

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

Euura myrsiniticola larvae feed on Whortle-leaved Willow. The gall is in contact with the midrib, projecting above and below the leaf-blade. The pea or bean shaped gall is usually about two-thirds on the underside of the leaf.

Jump to other group viminalis species

Size: Female: 2.4 - 4.6mm, male: 3.0 - 3.3mm

Status: Rare

Distribution: Scotland

Flight period: Univoltine

Plant associations: Salix myrsinites (Whortle-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