Not established in Britain or Ireland. A rare introduction in imported timber.
The eye spots on the head are widely separated as in U. gigas. The female abdomen is yellow to reddish brown on tergite 2, 7 and 8 (in the basal half) with the remainder black. The male abdomen is yellow with black basally and apically.
Larvae feed in timber of coniferous trees and take 2 to 3 years to develop.
Size: 12 - 40mm
Status: Not established, occasionally introduced.
Distribution: Not established
Flight period: June to October
Plant associations: Pinaceae (coniferous trees)
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
Schiff, N.M., Goulet, H., Smith, D.R., Boudreault, C., Wilson, A.D. and Scheffler, B.E., 2012. Siricidae (Hymenoptera: Symphyta: Siricoidea) of the western hemisphere. Canadian Journal of Arthropod Identification 21: 1-305, 21, pp.1-305.