Tenthredo distinguenda - Distinguished Sawfly
Recorded locally in England mostly to the south-east of Birmingham with a single outlier near Liverpool in 1993 (Musgrove, 2023).
A smaller Tenthredo species similar to Tenthredo amoena. Tenthredo distinguenda has the tegulae entirely yellow and the first antennal segment has a black fleck on the outer side. In amoena the tegulae are only edged with yellow and the first antennal segment is entirely yellow. In the female the fifth tergite is entirely yellow. Both species are mainly associated with chalk downlands.
Larvae feed on Perforate St John's-wort. Ova are deposited singly into the underside of leaves and take about a week to hatch. Larval development takes around 21 days.
Jump to other species of Tenthredo
Size: 8.5 - 9.5mm
GB IUCN Status: Least Concern
GB Rarity Status: None
Distribution: England
Flight period: May to June
Plant associations: Hypericum perforatum (Perforate St John’s-wort)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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- Tenthredo distinguenda female Credit Andrew Green
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- Tenthredo distinguenda female Credit Andrew Green
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- Tenthredo distinguenda female Credit Andrew Green
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- Tenthredo distinguenda male Credit Alan Outen
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- Tenthredo distinguenda pair Credit Sue Taylor
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- Tenthredo distinguenda female iBRC36537616
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- Tenthredo distinguenda female iBRC36537616
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- Tenthredo distinguenda female iBRC36537616
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- enthredo distinguenda ovum on Hypericum perforatum (reared ex iBRC36537616)
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- Tenthredo distinguenda first instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda second instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda early instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda early instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda middle instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda middle instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda late instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda middle instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda middle instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda late instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda late instar larva (reared ex iBRC36537616)
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- Tenthredo distinguenda eonymph (reared ex iBRC36537616)
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- Tenthredo distinguenda eonymph (reared ex iBRC36537616)
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- Tenthredo distinguenda eonymph (reared ex iBRC36537616)
References:
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Fekete, K. (2018) Beginner’s guide to identifying British Tenthredo, Natural History Museum, London. http://www.nhm.ac.uk/content/dam/nhmwww/take-part/identification-trainers/sawflies-guide-id-trainees.pdf [Accessed 26Apr2019]
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
Taeger, A. 1991: Vierter Beitrag zur Systematik der Blattwespengattung Tenthredo Linnaeus. Die Untergattung Zonuledo Zhelochovtsev, 1988 (Hymenoptera, Tenthredinidae). - Entomofauna. Zeitschrift für Entomologie, Ansfelden 12(23): 373-398