Pristiphora amphibola - Pristiphora nigella group
This species is similar to Pristiphora nigella but female amphibola are almost completely black and with a long sawsheath. Males can be distinguished by the penis valves.
Pristiphora amphibola larvae feed on Norway spruce and sitka spruce.
Size: 4.5 - 5.00mm
Distribution: England, Scotland, Wales
Flight period: Assumed April to May
Plant associations: Picea abies and Picea sitchensis (Norway spruce and sitka spruce)
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.D., 1981. Pristiphora (Lygaeophora) lanifica (Zaddach, 1882) new to Britain (Hymenoptera: Tenthredinidae). Entomologist's gazette.
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