EUURA CLITELLATA GROUP

Euura clibrichella - Klibreck Sedge Nematine

Nematus clibrichellus Cameron, 1878
Pachynematus clibrichellus (Cameron, 1878)
Nematus clibrichensis Cameron, 1882

Mostly upland in Scotland and Snowdonia although Benson noted it at sea level at Wick. A record from Derbyshire requires confirmation (Musgrove, 2024).

This species is loosely an arctic-alpine species. Although it has been found at sea level in the north of Scotland it is usually associated with high hill tundras (Scottish highlands, southern Scottish uplands, Pennines, etc.). This species is similar to Euura moerens, but is different from this through the broad rounded sawsheath that is shorter than the cerci. The male differs by the large triangular extension of the eighth tergite. Another distinguishing feature is hair on the head and thorax, which is grey and short in moerens, but dark in clibricellus and twice as long as the diameter of an ocellus.

Larvae feed on sedges.

Size: 6.0 - 7.0mm.

GB IUCN status: Vulnerable
GB rarity status: Nationally Scarce

Distribution: England, Scotland, Wales

Flight period: May to June

Plant associations: Carex spp. (sedges)

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

Liston, A.D., Knight, G., Heibo, E., Bland, K.P., Barstad, T.E., Blank, S.M., Boevé, J.L., Fiedler, C., Grearson, K.J., Halstead, A. and Jacobs, H.J., 2012. On Scottish sawflies, with results of the 14th International Sawfly Workshop, in the southern Highlands, 2010 (Hymenoptera, Symphyta). Beiträge zur Entomologie= Contributions to Entomology, 62(1), pp.1-68.

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 Natural England, unpublished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