Monsoma is a small genus of only four species globally distributed across the palaearctic and nearctic. In Britain and Ireland they are represented by a single species.

The genus is characterised by having the second antennal segment (pedicel) longer than broad. The head has a post-genal carina and the hind tarsus is about equal in length to the hind tibia.

Those species where the larvae are known appear to feed on alders.

Species list:

Monsoma pulveratum (Retzius, 1783)


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.