Euura pustulator explained

Euura pustulator is a species of sawfly belonging to the family Tenthredinidae (common sawflies). The larvae feed internally in a gall formed on the leaves of tea-leaved willow (Salix phylicifolia) and diamondleaf willow (Salix pulchra).

Description of the gall

The thin-walled gall is ovoid, bladder-like, usually green and may broaden the leaf. It is 11 mm long and 5 mm across and is found on tea-leaved willow (S. phylicifolia) and diamondleaf willow (S. pulchra).^{[1] [2]}

Euura pustulator is one of two closely related species in the Euura vesicator subgroup; the other being E. vesicator.^[3]

Distribution

The sawfly has been recorded from Finland, Great Britain (northern England and Scotland), Russia, Slovakia and Sweden.^{[1] [3]}

Notes and References

1. Book: Redfern . Margaret . Shirley . Peter . Boxham . Michael . British Plant Galls . 2011 . Field Study Council . Shrewsbury . 978-185153-284-1. 282–299 . Second.
2. Web site: Ellis . W N . Euura pustulator (Forsius, 1923) . Plant Parasites of Europe . 11 July 2018.
3. Liston. Andrew D. Heibo. Erik. Prous. Marko. Vardal. Hege. Nyman. Tommi. Vikberg. Veli. North European gall-inducing Euura sawflies (Hymenoptera, nthredinidae, Nematinae). Zootaxa. 2017. 4302. 1. 100. 10.11646/zootaxa.4302.1.1 . 1175-5334. free.