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.

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Size: 5.0 - 7.0mm

Status: Data deficient

Distribution: England

Flight period: May to July

Plant associations: Acer spp. (maples, sycamore, etc.)

The National Biodiversity Network records are shown on the map below. (See terms and conditions)

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References:

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