Pristiphora groenblomi - Pristiphora carinata group
The stigma is brown and not darker than the costa. The labrum, pronotum, tegulae, coxae, femora and bases of tibia are reddish-yellow. The female is best determined by the characteristics of the saw. Males are best determined by the penis valve.
Pristiphora groenblomi larval food plant is unknown but might be a birch species. It is associated with uplands.
Size: Assumed 5.5 - 7.5mm
Flight period: May to July
Plant associations: Unknown, but possibly Betula sp. (birch?)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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