EUURA PUNICEA GROUP

Euura longiserra - Long-sawed Willow Nematine

Nematus longiserra Thomson, 1863
Amauronematus longiserra (Thomson, 1863)
Nematus leucodous Zaddach, 1884

North to northern Scotland (but most records southern England). Records are sparse but the species continues to be found sporadically (Musgrove, 2024).

A reddish-brown species with black antennae and more or less marked black on the basal tergites of the abdomen and on the lateral lobes of the mesonotum. The female has an ovipositor that is longer than the hind tibia. The male is orange on the underside of the thorax with a black band along the sternopleural line. Determination should be confirmed by reference to the genitalia in both genders.

Euura longiserra larvae feed on Eared Willow and Goat Willow.

Size: Female: 7.0 - 8.0mm, male: 6.0 - 7.0mm.

GB IUCN status: Near Threatened
GB rarity status: Nationally Rare

Distribution: England, Scotland

Flight period: April

Plant associations: Salix aurita (Eared Willow), Salix caprea (Goat Willow).

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

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 Natural England, unpublished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