EUURA CLITELLATA GROUP
Euura obducta - Hidden Grass Nematine
Nematus obductus Hartig, 1837
Pachynematus obductus (Hartig, 1837)
Nematus conductus Ruthe, 1859
Nematus graminis Cameron, 1874
North to Shetland, Benson (1958) commenting that 'it occurs to the tops of the highest mountains' (Musgrove, 2024).
Males are very rare. The species is largely black above and green below. The lower face of the male is white and in the female also often the mandible base, the labrum, sometimes the anterior margin of the clypeus, the posterior margin of the pronotum, the tegulae (always in the female, mostly in the male). The legs whitish usually on the coxae, base of the femora. Rarely the hind leg is completely black with the tip of the tibiae blackish or brownish and the tarsi often brown. Mostly the temples of the male are slightly translucent.
Euura obducta larvae feed on grasses including meadow grass and fescues.
Size: 4.0 - 5.5mm.
GB IUCN status: Least Concern
GB rarity status: None
Distribution: England, Scotland, Wales, Ireland
Flight period: Multivoltine, April to September
Plant associations: Gramineae including Poa spp. and Festuca spp. (grasses including meadow grass and fescues). Also carex spp. (sedges).
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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- Euura obducta female Credit Ian Andrews
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- Euura obducta female Credit Ian Andrews
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- Euura obducta sawsheath Credit Ian Andrews
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- Euura obducta lancet Credit Ian Andrews
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- Euura obducta serrulae Credit Ian Andrews
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 Natural England, unpublished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