EUURA MYOSOTIDIS GROUP

Euura bipartita - Divided Willow Nematine

Nematus bipartitus Serville, 1823
Nematus aurantiacus Hartig, 1837
Nematus xanthogaster Förster, 1854
Nematus ochropus Thomson, 1863
Pteronidea fulviventris Lindqvist, 1958
Nematus fulviventris (Lindqvist, 1958)
Pteronidea rutilipes Lindqvist, 1959
Nematus rutilipes (Lindqvist, 1959)
Pteronidea stramineipes Lindqvist, 1958
Nematus stramineipes (Lindqvist, 1958)
Euura rutilipes (Lindqvist, 1959)
Euura stramineipes (Lindqvist, 1958)
Euura fulviventris (Lindqvist, 1958)

North to northern Scotland, fairly frequently recorded (Musgrove, 2024).

The head is black with orange-red on the mouthparts, between the antennae and a larger spot on the upper corner of the eye. In the male the whole lower part of the head and more or less the orbits and the base of the antennae are sometimes more or less yellow. The thorax is orange-red with black on the mesonotum, mesosternum, middle of the metanotum. The abdomen is completely orange-red with at most the middle of the first tergite black. The legs are yellow with slightly darkened tarsi.

Euura bipartita larvae feed on the underside of rolled leaves of Creeping Willow and Common Osier.

Size: Female: 5.0 - 6.5mm, male: 5.0 - 6.5mm.

GB IUCN status: Least Concern
GB rarity status: None

Distribution: England, Scotland, Wales

Flight period: May to June and July to August

Plant associations: Salix repens and Salix viminalis (creeping willow and common osier).

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 Natural England, unpublished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