Pachyprotasis nigronotata

To date this species has only been recorded twice in Britain, at Fairbourne on the west coast of Wales in 1942 and at Hafren Forest in Montgomeryshire in 1975. There is no reason to consider these records not to relate to wild individuals, and so with no further records for nearly 50 years, the species is considered Regionally Extinct. However, it should still be sought, particularly in Wales (Musgrove, 2023).

A largely green species which can be distinguished from the similar Pachyprotasis antennata by the green stigma (black in antennata). 

Pachyprotasis nigronotata larvae feed on a variety of herbaceous plants.

Jump to other species of Pachyprotasis

Size: 7 - 9mm

GB IUCN Status: Regionally Extinct
GB Rarity Status: Extinct

Distribution: Wales

Flight period: June

Plant associations: Mentha aquatica, Alchemilla spp., Geum spp. and Plantago spp. (water mint, lady's mantle, avens and plantains)


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. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished