Pristiphora depressa - Pristiphora depressa group
Discovered as new to Britain in 2021 by Dave Gibbs. Similar to subbifida. The head in dorsal view has only small pale spots (extensively pale in subbifida) and on the thorax the metapostnotum is black (at least partially pale in subbifida). Legs are for the most part pale. Pterostigma dark. Males are unknown. The female is best determined by the characteristics of the saw and sawsheath.
Pristiphora depressa larvae feed on maples and sycamore species.
Size: 5.0 - 7.0mm
Status: Data deficient
Flight period: May to July
Plant associations: Acer spp. (maples, sycamore, etc.)
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Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Gibbs, D., 2022. Pristiphora depressa (Hymenoptera:Tenthredinidae) new to Britain. British Journal of Entomology and Natural History vol. 35 pt1 p1-4
Liston, A. D. & Späth, J. 2008: On the sawflies of Cyprus, with a revision of the Pristiphora subbifida species group (Hymenoptera, Symphyta). - Mitteilungen der Münchner Entomologischen Gesellschaft, München 98: 99-120
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
Prous, M., Kramp, K., Vikberg, V. and Liston, A., 2017. north-Western Palaearctic species of Pristiphora (hymenoptera, tenthredinidae). Journal of Hymenoptera Research, Vol. 59