A small black bodies insect with uniformly infuscated wings. The tegulae, tibiae and basal tarsal segments are yellowish-white. The tergites have a fine microreticulated, or alutaceous, surface sculpture visible at high magnification. Males are unknown.
Profenusa pygmaea larvae mine in the upper cell layers of oak leaves.
Size: 3 - 4mm
Distribution: England, Scotland, Wales, Ireland
Flight period: May to July
Plant associations: Quercus robur and Quercus petraea (pedunculate and sessile oaks)
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