EUURA CLITELLATA GROUP

Euura moerens - Fading Grass Nematine

Nematus moerens Förster, 1854
Pachynematus moerens (Förster, 1854)
Nematus pleuralis Thomson, 1863
Nematus pygostolus Förster, 1854
Pachynematus pullus Konow, 1903
Pachynematus torridonensis Liston, 1980

North to northern Scotland, less frequently encountered (Musgrove, 2024).

Black with a more or less yellowish labrum, clypeus and spot on the upper corner of the eye. The posterior orbits are translucent brown. The tegulae and most of the posterior margin of the pronotum are yellowish. Sometimes the trochanters, the apices of the femora, the tibia and the tarsi are coloured whitish.

Euura moerens larvae feed on grasses.

Size: 5.5 - 6.5mm.

GB IUCN status: Critically Endangered
GB rarity status: Nationally Rare

Distribution: England, Scotland, Wales, Ireland

Flight period: April to May

Plant associations: Gramineae (grasses)

The National Biodiversity Network records are shown on the map below. (See terms and conditions)

References:

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

Muche, W.H., 1974. Die Nematinengattungen Pristiphora Latreille, Pachynematus Konow und Nematus Panzer (Hym., Temthredinidae). Deutsche Entomologische Zeitschrift, 21(1/3), pp.1-137.

Musgrove, A.J. 2024. A review of the status of sawflies of Great Britain - Phase 3: The Tenthredinidae (subfamily Nematinae). Natural England, unpublished

Prous, M., Liston, A., Kramp, K., Savina, H., Vårdal, H. and Taeger, A., 2019. The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae). ZooKeys, 875, p.63-127