EURA VIMINALIS GROUP

Euura arcticornis - Northern-horned Pea-galler

Pontania arcticornis Konow, 1904
Eupontania arcticornis (Konow, 1904)
Pontania phylicifoliae Forsius, 1920

Scotland and northern England. Benson (1958) described the species as 'local from the Pennines northwards', but there remain very few records of this species (and none where there is an identified associated foodplant). Difficulties regarding the identification of willow species are likely to be at least partly responsible however (Musgrove, 2024).

See Liston et al (2017) for determination of adults. The host plant is an upland species.

Euura arcticornis larvae feed on Tea-leaved Willow. The gall is in contact with the midrib, projecting only below the leaf-blade. The gall is often irregularly shaped, glabrous and yellow-green.

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Size: Female: 3.0 - 4.9mm, male: 3.5 - 3.8mm

GB IUCN Status: Data Deficient
GB Rarity Status: Unclear

Distribution: England, Scotland, Ireland

Flight period: Univoltine

Plant associations: Salix phylicifolia (Tea-leaved 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 Natural England, unpublished