Euura testaceipes - Osier Petiole-galler

See Liston et al (2017) for determination of adults. The main host plants are widespread species. Within this group, males of Euura mucronata, Euura testaceipes and Euura venusta are inseparable.

Euura testaceipes larvae feed on leaves of white willow, crack willow (or hybrids thereof) and almond willow causing a spindle shaped swelling in the midrib or leaf petiole. Sometimes more than one gall per leaf.

Jump to other group amerinae species

Size: Female: 3.8 - 4.7mm, male: approx. 3.2mm

Status: Rare

Distribution: England, Scotland

Flight period: Univoltine

Plant associations: Salix alba, Salix fragilis and Salix triandra (white willow, crack willow and almond willow)


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.