Euura weiffenbachiella explained

Euura weiffenbachiella is a species of sawfly belonging to the family Tenthredinidae (common sawflies). The larvae forms galls on creeping willows (Salix repens). E. weiffenbachiella is one of a number of closely related species which is known as the Euura atra subgroup.

Description

The shape of the gall is variable, probably depending on where the egg is laid;^[1]

• it can develop on one side of the shoot, causing it to bend and look similar to a miniature gall of E. amerinae, or
• it can be spindle-shaped with the shoot remaining straight measuring to long by approximately wide.

Found on creeping willow (S. repens) and S. rosmarinifolia.^[1]

Other similar looking species in the Euura atra subgroup are,^[1]

• E. atra found on white willow (Salix alba) and crack willow (S. fragilis).
• E. auritae found on eared willow (S. aurita)
• E. myrtilloides found on swamp willow (Salix myrtilloides)
• E. salicispurpureae found on purple willow (S. purpurea)

Distribution

Liston et al. records the sawfly from central and northern Europe, and east to Yakutia.^[1] Redfern et al. records the gall from Great Britain (Scotland) and Ireland.^[2]

External links

• Euura Gallers

Notes and References

1. Liston. Andrew D. Heibo. Erik. Prous. Marko. Vardal. Hege. Nyman. Tommi. Vikberg. Veli. North European gall-inducing Euura sawflies (Hymenoptera, Tenthredinidae, Nematinae). Zootaxa. 2017. 4302. 1. 60. Magnolia Press. 1175-5334. 10.11646/zootaxa.4302.1.1. free.
2. Book: Redfern . Margaret . Shirley . Peter . Boxham . Michael . British Plant Galls . 2011 . Field Study Council . Shrewsbury . 978-185153-284-1. 282–299 . Second.