EUURA FLAVESCENS GROUP
Euura dorsata - Blackback Birch Nematine
Nematus dorsatus Cameron, 1875
Cameron (1875) considered this to be 'not an uncommon species' in Scotland. Only two subsequent specimens have been reported however (from England and Wales) (Musgrove, 2024).
The depressed parts of the metanotum, the metascutum and at most the basal three tergites marked with black.
Euura dorsata larvae feed on birches.
Size: Female: 7.5 - 8.0mm.
GB IUCN status: Regionally Extinct
GB rarity status: Extinct
Distribution: Scotland, Wales
Flight period: May to June
Plant associations: Betula spp. (birches).
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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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 Natural England, unpublished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