Euura bridgmanii

Euura bridgmanii is a species of sawfly belonging to the family Tenthredinidae (common sawflies). The larvae feed on the leaves of sallows (Salix species). It was first described by the entomologist Peter Cameron in 1883.

Euura bridgmanii
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Suborder: Symphyta
Family: Tenthredinidae
Genus: Euura
Species:
E. bridgmanii
Binomial name
Euura bridgmanii
Synonyms

Pontania bridgmani
Pontania obscura Kopelke 2005
Euura abdita Kopelke 2014

Description of the gall

The gall is formed when the female lays her eggs and injects a substance into the leaf. Up to 8 mm x 6 mm in size, the ovoid gall is similar to E. proxima but often develops near to or on the midrib. At first the galls are green, and as the larva grows, soften and turn red. It often has a thin red rim on the upper surface.[1]

Galls of E. bridgmani are found on eared willow (S. aurita), goat willow (S. caprea), grey willow (S. cinerea), S.appendiculata, S. foetidal, halberd willow (S. hastata), tea-leaved willow (S. phylicifolia), S. silesiaca, S. starkeana and S. waldsteiniana.[2]

Euura bridgmani is one of three closely related species in the Euura proxima group. The others members of the group are,

Distribution

This species is found in western, central and northern Europe including France, Great Britain, the Netherlands, Norway and Sweden.[2][3][4]

Inquilines

Euphranta toxoneura (Loew, 1846) is an inquiline of E. bridgmani and E. proxima. The host larva is killed by the fly and the inquiline feeds on the interior of the gall. When fully grown the inquiline larva leaves the gall, pupating in the soil.[5]

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References
  1. Chinery, Michael (2011). Britain's Plant Galls. Old Basing, Hampshire: WildGuides Ltd. p. 65. ISBN 978 190365743 0.
  2. Ellis, W N. "Euura bridgmanii (Cameron, 1883)". Plant Parasites of Europe. Retrieved 30 June 2018.
  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. 4302 (1): 83–85. ISSN 1175-5334.
  4. Redfern, Margaret; Shirley, Peter; Boxham, Michael (2011). British Plant Galls (Second ed.). Shrewsbury: Field Study Council. pp. 282–299. ISBN 978 185153 284 1.
  5. Ellis, W N. "Euphranta toxoneura (Loew, 1846)". Plant Parasites of Europe. Retrieved 30 June 2018.
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