EUURA PROXIMA GROUP

Euura bridgmanii - Bridgman's Bean-galler

Nematus bridgmanii Cameron, 1883
Pontania bridgmanii (Cameron, 1883)
Pontania kirchneri Zirngiebl, 1959
Pontania obscura Kopelke, 2005

North to northern Scotland, very common and widespread (Musgrove, 2024). See Liston et al (2017) for determination of adults. Within this group, males of Euura proxima, bridgmanii and triandrae cannot be separated.

Euura bridgmanii larvae feed on a range of broad-leaved willows causing coffee bean shaped galls that transect the leaf blade but grow more on the upper surface. The galls are green and smooth but more or less pubescent.

Jump to other group proxima species

Size: Female: 2.6 - 3.8mm, male: not examined

GB IUCN status: Least Concern
GB rarity status: None

Distribution: England, Scotland, Wales, Ireland

Flight period: Uni- or bivoltine

Plant associations: Salix aurita, Salix caprea, Salix cinerea, Salix atrocinerea, Salix appendiculata and Salix phylicifolia (various broad-leaved willows)

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 Natural England, unpublished