EUURA MELANOCEPHALUS GROUP
Euura cadderensis - Cadder's Birch Nematine
Nematus cadderensis Cameron, 1875
Pteronidea macroserrata Lindqvist, 1943
Pteronidea nuortevai Lindqvist, 1958
Nematus nuortevai (Lindqvist, 1958)
Euura nuortevai (Lindqvist, 1958)
North to northern Scotland, but not common (Musgrove, 2024). The female of this species can only be distinguished from Euura ferruginea by examination of the saw in the female.
The overall colour is reddish-brown but this species is very variable. In the female the occipital area and the propleuron are often black as are two or three longitudinal stripes on the mesonotum. The mesosternum, metapleuron and the dorsum of the abdomen along the midline are sometimes also black.
The head of the male can be completely black and only the labrum and an upper eye patch remain yellow. The hind legs are predominantly yellow with darker tarsal apices.
Euura cadderensis larvae feed on birches and possibly willows (continental reference).
GB IUCN status: Near Threatened
GB rarity status: Nationally Rare
Distribution: England, Scotland, Ireland
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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- We are currently looking for images of this species. Please contact the webmaster if you can assist.
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- Euura cadderensis larva Credit John Grearson
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- Euura cadderensis late instar larvae Credit Ed Hardy
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- Euura cadderensis late instar larvae Credit Ed Hardy
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- Euura cadderensis late instar larvae Credit Ed Hardy
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