EUURA AMERINAE GROUP

Euura testaceipes - Osier Petiole-galler

Cryptocampus testaceipes Brischke, 1883
Euura cynips Newman, 1837

North to southern Scotland, few records to date (Musgrove, 2024).

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

GB IUCN status: Least Concern
GB rarity status: None

Distribution: England, Scotland, Wales

Flight period: Univoltine

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

The National Biodiversity Network records are shown on the map below. (See terms and conditions)

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

Musgrove, A.J. 2024. A review of the status of sawflies of Great Britain - Phase 3: The Tenthredinidae (subfamily Nematinae). Natural England, unpublished