Euura arbusculae

Euura arbusculae is a species of sawfly belonging to the family Tenthredinidae (common sawflies). The larvae feed internally in a gall formed on the leaves of mountain willow (Salix arbuscula).

Euura arbusculae
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Suborder: Symphyta
Family: Tenthredinidae
Genus: Euura
Species:
E. arbusculae
Binomial name
Euura arbusculae
(Benson, 1941)
Synonyms

Pontania arbusculae Benson, 1941
Nematus (Pontania) arbusculae Zhelochovtsev (1988)
Eupontania arbusculae Vikberg (2003)

Description of the gall

Descriptions of the gall differs depending on the source. According to Redfern et al (2011) the thin-walled gall is globular, 4–10 mm diameter and usually protruding more on the underside of the leaf. According to the website Plant Parasites of Europe, the thin-walled gall protrudes equally on either side of the leaf. The gall is large in relation to the size of the leaf.[1][2]

Distribution

This species has only been recorded from Scotland. It may occur in Sweden where similar looking galls (without larvae) have been found and on Kolguyev Island, where galls have also been found.[3]

References
  1. Redfern, Margaret; Shirley, Peter; Boxham, Michael (2011). British Plant Galls (Second ed.). Shrewsbury: Field Study Council. pp. 282–299. ISBN 978-185153-284-1.
  2. Ellis, W N. "Euura arbusculae (Benson, 1941)". Plant Parasites of Europe. Retrieved 7 June 2019.
  3. Liston, Andrew D; Heibo, Erik; Prous, Marko; Vardal, Hege; Nyman, Tommi; Vikberg, Veli (2017). "North European gall-inducing Euura sawflies (Hymenoptera, Tenthredinidae, Nematinae)". Zootaxa. Magnolia Press. 4302 (1): 88. doi:10.11646/zootaxa.4302.1.1. ISSN 1175-5334.
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