Pristiphora armata - Hawthorn Sawyer
Pristiphora ruficornis group
North to central Scotland. Now the most frequently recorded species of Pristiphora, seemingly having increased in recent years as Benson (1958) went to the effort of listing the counties from which it had been noted. Can be common along hawthorn hedges in farmland (Musgrove, 2024).
This species cannot always be separated from Pristiphora leucopus. Males occur abundantly (rare in leucopus). In males, the entire abdomen is black including all sternites and the antennae are reddish-yellow. In the females, the femora are usually almost totally black. Determination of the females, is best done by examination of the saw.
Pristiphora armata larvae feed singly on hawthorns. Ova are deposited at the leaf margins.
Jump to other species of Pristiphora
Size: 5-7mm
GB IUCN status: Least Concern
GB rarity status: None
Distribution: England, Scotland, Wales, Ireland
Flight period: April to July
Plant associations: Crataegus spp. (hawthorns)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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- Pristiphora armata male
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- Pristiphora armata male
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- Pristiphora armata male
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- Pristiphora armata penis valve Credit Andrew Green
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- Pristiphora armata antennal detail Credit Andrew Green
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- Pristiphora armata male
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- Pristiphora armata female reared (iBRC33202290) Credit Andrew Green
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- Pristiphora armata female reared (iBRC33202290) Credit Andrew Green
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- Pristiphora armata female reared (iBRC33202290) Credit Andrew Green
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- Pristiphora armata female Credit Alan Outen
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- Pristiphora armata female Credit Alan Outen
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- Pristiphora armata female Credit Alan Outen
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- Pristiphora armata late instar larva reared (iBRC33202290) Credit Andrew Green
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- Pristiphora armata late instar larva reared (iBRC33202290) Credit Andrew Green
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- Pristiphora armata larva Credit John Grearson
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- Pristiphora armata larva Credit John Grearson
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- Pristiphora armata first instar larva on hawthorn (ex female iBRC33202290) Credit Andrew Green
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- Pristiphora armata ovum on hawthorn (ex female iBRC33202290) Credit Andrew Green
References:
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Grearson, K.J. and Liston, A.D., 2012. Review of seasonal polyphenism in the Symphyta (Hymenoptera), exemplified by Pristiphora leucopus (Hellén, 1948)(Tenthredinidae). Zootaxa, 3502, pp.72-88.
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., Kramp, K., Vikberg, V. and Liston, A., 2017. North-Western Palaearctic species of Pristiphora (hymenoptera, tenthredinidae). Journal of Hymenoptera Research, 59
Prous, M., Vikberg, V., Liston, A. and Kramp, K., 2016. North-western Palaearctic species of the Pristiphora ruficornis group (Hymenoptera, Tenthredinidae). Journal of Hymenoptera Research, 51