Pristiphora pseudocoactula - Pristiphora alpestris group
Very similar to Pristiphora alpestris but usually with a black clypeus, labrum hind femur ans sawsheath. The female is best determined by the characteristics of the saw. Males are best determined by the penis valve.
Pristiphora pseudocoactula larvae feed on downy birch and develop rapidly (10 to 15 days). May also feed on other birches and willows.
Size: 5.0 - 6.0mm
Status: Data deficient
Distribution: England, Scotland, Wales
Flight period: May to July
Plant associations: Betula pubescens (downy birch)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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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, 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
Prous, M., Kramp, K., Vikberg, V. and Liston, A., 2017. north-Western Palaearctic species of Pristiphora (hymenoptera, tenthredinidae). Journal of Hymenoptera Research, Vol. 59