Trichiosoma lucorum - Wood Hairy-clubhorn

Most recent records of lucorum (post-1981) will have involved recorders referring to either Benson (1951) who synonymised tibiale (and other taxa) within lucorum. It is seldom evident which reference has been used for the identification of any given record. As a result, British records of lucorum cannot be assumed to rule out tibiale. All recent authors make it clear that they are highly uncertain about the validity of the keys they have produced for this genus (Musgrove, 2022). Description here follows Zhelochovtsev (1988). Males cannot be reliably distinguished from Trichiosoma laterale at present. The female is black on the abdomen and lacks any reddish-brown laterally or beneath. On the apical tergites, the silky, adpressed pubescence does not obscure the underlying puncturation.

Trichiosoma lucorum larvae feed on birches and willows.

Jump to other Cimbicidae

Size: 13 - 24mm

GB IUCN Status: Data Deficient
GB Rarity Status: Unclear

Distribution: England, Scotland, Wales, Ireland

Flight period: May to June

Plant associations: Betula spp. and Salix spp.(birches and willows).


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.

Musgrove, A.J. 2022. A review of the status of sawflies of Great Britain - Phase 1: families other than Tenthredinidae. Natural England, unpublished

Viitasaari, M. 1989: Taxonomic notes on the genus Trichiosoma Leach (Hymenoptera, Cimbicidae) II. - Annales Entomologici Fennici, Helsinki 55 (3): 111-129

Zhelohovcev, A. N., Zinovjev, A.G. 1988: 27. Otrjad Hymenoptera - Pereponchatokrylye Podotrjad Symphyta (Chalastogastra) - Sidjachebrjuhie.