Fenusa altenhoferi

Some authors consider Kaliofenusa altenhoferi and Kaliofenusa ulmi as a single species under the name Kaliofenusa pusilla. In the 2023 status review, the two species were treated as one under the name ulmi

Widely recorded throughout all of mainland Britain, as well as on Skye (Musgrove, 2023).

Males are rare.  In this species the frons has lateral walls that appear to be deeply indented and lateral foveae in short, deep, ellipsoid furrows that stop short of the frontal furrow. Colour and sawsheath appear to be unreliable for identification of Kaliofenusa.

Eggs are deposited in the leaf margin of field and English elm from where the larvae forms a blister mine that can eventually fill the entire leaf blade. The Kaliofenusa species appear to prefer suckers and regrowth.

Jump to other species of Fenusa

Size: 3.5 - 4.5mm

Status: unknown

Distribution: England, Scotland

Flight period: Bivoltine? April to June and August.

Plant associations: Ulmus minor and Ulmus procera (field elm and English elm)

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. D. 1994. Kaliofenusa carpinifoliae LIston (Hymenoptera: Tenthredinidae), a newly recognised leafminer on field elms in Britain. British Journal of Entomology and Natural History, vol.7 (1), pp15-18.

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. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished