Page last updated 5th March 2020
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| Aneugmenus padi, East Wretham Heath (Andy Musgrove) |
Genus Aneugmenus
Moderately small sawflies, overall dark head/thorax/abdomen with contrasting pale tegulae and pale legs including the femora {all spp?}. Forewing shows typical Selandriinae 'curl' and anal cell has no cross-vein. Hindwing cell C does not touch RS.
Associated with bracken, with one common species, two scarce and one absent from the county.
Aneugmenus coronatus
The first record for Norfolk was a female found in a garden at Waxham in 2018. Seems to be a fairly rare species nationally.
[Aneugmenus fuerstenbergensis]
Not yet recorded in Norfolk although could be found in future. Seems to be quite rare but widespread elsewhere in Britain.
Aneugmenus padi
Of the four species in this genus, padi is by far the most common. It can be quite numerous around even small patches of bracken.
Flight period: 1st May to 2nd Sep, but mostly between late May and mid Jul.
19th century: Salhouse, Brundall, Norwich
20th century: many locations
21st century: many locations
Aneugmenus temporalis
Just four records to date, from Catfield Fen (1993), East Wretham Heath (1993), Grimes Graves (2003) and Brettenham Heath (2003). Could be readily overlooked amongst the much more numerous padi. Seems to be quite rare nationally?
Genus Dolerus
35 species in a number of sub-genera, which partially correspond to the groups identified by Benson. Identification can be tricky, particularly amongst the all-black species.
Loderus per Benson
Benson listed three species in the genus Loderus, which is now subsumed within Dolerus, and is spread across three new subgenera. All of these feed on horsetails Equisetum, as do species in two new subgenera that were part (not all) of Benson's 'red groups' of Dolerus.
Subgenus Loderus
Two species, treated as subspecies of just one by Benson. Both feed on Equisteum.
[Dolerus gilvipes]
Not recorded in Norfolk. Relatively little known, records from northern England and Scotland.
[Dolerus pratorum]
There is apparently a specimen from Holme in Norwich museum, which will be worth checking (there is a risk of a mistaken name vs pratensis). Relatively little known, records include Surrey, Staffordshire and Wales.
Subgenus Dicrodolerus
Dolerus vestigialis
Locally common. Proved to be notably common mid-May 2019 around Shotesham (unclear yet how much between-year variation there might be?) Appears widespread across Britain.
Flight period: 15th Apr to 16th Jun
19th century: records from Norwich and Brundall
20th century: King's Lynn, Wheatfen, Gressenhall, East Bilney, Stanford Water, Buckenham Tofts, Beeston Common
21st century: East Walton Common, Thompson Common, Castle Acre, Shotesham, Wheatfen, Holme, Acle, Frogshall, Wheatfen, Waxham, Thetford, Santon Downham, Devil's Punchbowl, Hardley Flood.
Subgenus Oncodolerus
Dolerus eversmanni
Seems strangely rare in Norfolk so far, or perhaps overlooked. No old records, with just singles from Castle Acre in 2007 and Shotesham Common in 2019.
Dolerus per Benson
[red groups]
Another on Equisetum. Not sure why in own subgenus, nested within the above group of species (now subgenus Dolerus) in Benson's keys.
Dolerus pratensis
In Norfolk, Bridgman said it was common amongst Equisetum in the late 1800s but since then just occasional records, from Wheatfen (1938), East Dereham (1954), Blickling (1989), Castle Acre (2007), Thompson Common (2007) and Surlingham Church Marsh (2018). Nationally quite widespread.
Subgenus Cyperolerus
{One species on Eleocharis. Keys with Achaetoprion}
Dolerus anticus
Local, feeding on Eleocharis. Bridgman recorded the species once at Brundall in the late 19th century, and Bloomfield once at King's Lynn early 20th century. Then no records until Thompson Common in 2007 and Stubbs Green (Shotesham) 2019. The 2019 record at least was definitely taken from Eleocharis.
Subgenus Achaetoprion
{Four species with larvae on Juncus (last presumed so anyway). First three have red abdomens but last does not; all have black legs. Mesopleura without crater-like punctures. Males all with similar penis-valves}
Dolerus ferrugatus
Relatively regular. Appears to be quite widespread elsewhere in Britain.
Flight period: 21st Apr to 15th Jul
19th century: One record at Brundall in the late 19th century.
20th century: Horsey, West Harling, Thompson Common, Holt Lowes, Lenwade, Hoe ROugh, Woodbastwick
21st century: Beeston Common, Thompson Common, Flordon Common, Holme, Shotesham, Brooke
Dolerus madidus
Quite scarce to date in Norfolk (could there perhaps have been species confusion early on??) Bloomfield considered this to be common in the King's Lynn area in the early 20th century. However, no subsequent records until Holme (2015), Shotesham Common (2018), Foulden Common (2018) and Fritton Common (2019).
Dolerus triplicatus
Relatively regular but perhaps becoming scarcer? Local elsewhere in England and Wales.
Flight period: 1st May to 8th Jul
19th century: considered rare, with one from Sparham in the late 1800s
20th century: King's Lynn, Shipdham, Fowlmere, Fritton Common, Calthorpe
21st century: Shotesham Common, Holme
[black groups]
Dolerus aeneus
Sawfly website
Widespread in Norfolk and elsewhere in the UK
Flight period: 7th Apr to 25th Jun
19th century: Norwich, King's Lynn
20th century: Stanford Training Area, West Harling, Thompson Common, Lenwade, Beeston Common, Salthouse Heath, Blickling, Metton, Holt Lowes
21st century: Brandon, Acle, Buckenham Carrs, Waxham, Horsey, Catfield, Holme, Thetford, Shotesham
Dolerus anthracinus
Sawfly website
A very early spring species, apparently on the wing from February to April and favouring chalk grassland. Only two old records from Norfolk - Eaton in the late 19th century (late May) and Wheatfen in 1940. Neither of these obviously seem to fit the suggested habitat and it would be good to re-examine specimens if at all possible.
Dolerus asper
Sawfly website
###records in 1989 and 2014; taxonomic change since Benson may suggest these records need further checking?
Dolerus brevicornis
Sawfly website
###this species was split from D. asper post-Benson. A record exists from West Harling in 1979, which (as the only one to date) would be good to examine more carefully. UPDATE 2019: confirmed male from Shotesham in March (gen. det.)
[Dolerus coracinus]
Sawfly website
No Norfolk records to date. Benson knew the species only from Aviemore, and there are some shown in Northumberland on the NBN, so perhaps a more northern species.
Dolerus fumosus
Sawfly website
##common (known as D. sanguinicollis by Benson)
Dolerus gonager
Sawfly website
##a few old records, then none until six records in 2018 (from Waxham/Horsey, Norwich and Weeting). This seems a surprising pattern worthy of further investigation; identification issues or perhaps a recent range expansion?
Dolerus haematodes
Sawfly website
##another species with old records, then more recent ones in 2016 and 2018.
[Dolerus harwoodi]
Sawfly website
A scarce northern species, with no Norfolk records. Benson noted it only from Inverness (any more since?)
Dolerus liogaster
Sawfly website
##Norfolk records exist but the species has been recently split (to liogaster+schmidti), so may not be possible to confirm definitively yet.
Dolerus niger
Sawfly website
##several recent records
Dolerus nigratus
Sawfly website
##common
Dolerus nitens
Sawfly website
##some older reports, plus a single recent record in 2017
Dolerus picipes
Sawfly website
##common, apparently mostly in Brecks?
Dolerus possilensis
Sawfly website
##a few records including from the Brecks in 2014 and 2018.
Dolerus puncticollis
Sawfly website
##occasional, with recent records
Dolerus schmidti
Sawfly website
##not yet confirmed, but a recent split from D. liogaster and it is possible that some records previously assigned to that species are actually schmidti.}
[Dolerus stygius]
Sawfly website
No Norfolk records to date. Benson notes that it (as D. megapterus) was known only from northern Scotland, plus perhaps also the Manchester area. The NBN also shows a couple of dots in the Midlands.
Dolerus varispinus
Sawfly website
##a few recent records from the east of the county.
Genus Birka
Fairly small sawfly, mostly dark with contrastingly pale tibiae. Note scutellum, tegulae and hind femora all black. Forewing shows typical Selandriinae 'curl' and anal cell has no cross-vein.
Birka cinereipes
Reasonably widespread, with a tendency to wetland habitats as the larval foodplant is Water Forget-me-not.
Flight period:1st May to 25th Aug
19th century: records from Buckenham and Brundall
20th century: Foulden, Thompson Common, Wheatfen, Blickling, Stiffkey, Kings Lynn, Stanford Training Area
21st century: Sheringham Park (2006), Sutton Fen (2013), Strumpshaw Fen (2018)
Genus Nesoselandria
Nesoselandria morio
Genus Brachythops
Brachythops flavens
There are a series of specimens in the Norwich Castle Museum, collected by Bridgman at Brundall in 1880; given the relative lack of subsequent records it would be worthwhile checking these. The only other records are from Strumpshaw Fen (1993), Woodbastwick Fen (1993), Middle Harling Fen (2003) and Sutton Fen (2013), so clearly a wetland theme. Apparently quite widespread across Britain, larvae feeding on sedges.
[Brachythops wuestneii]
No Norfolk records to date and much rarer than flavens in a British context, larvae known only from Slender Sedge. Interestingly, this plant does occur in the Broads, in the Bure and Ant valleys, so it is perhaps not impossible that it could be present in the county.
Genus Selandria
[Black/yellow sawflies; superficially similar to Athalia but without the "socks". Also easy to not recognise as Selandriinae because the typical curved back vein is not obvious in this genus. All-yellow legs. Pale tegulae.] Two species largely separable on size; one much commoner than the other.
Selandria melanosterna
Much the scarcer of the genus in Norfolk, and in Britain more widely. Bridgman recorded it from Brundall and Heigham in the 1880s, and there were records from Wheatfen in the 1930s. Ken Durrant's collection has a series from Mannington Hall in 1987 and 1988. Otherwise, just single records from Castle Acre (1997) and Shotesham Common (2018). Previously known as S. sixii.
Selandria serva
A common and widespread sawfly.
Flight period: 6 May to 5 Sep.
19th century: Bridgman noted as 'very common at midsummer'
20th century: many locations
21st century: many locations
Genus Pseudohemitaxonus
Pseudohemitaxonus sharpi
The only record is from Wheatfen in 1937. This is a rare species nationally and so it would be good to re-examine the specimen, if it still exists. Should be sought around ferns?
Genus Stromboceros
Stromboceros delicatulus
Atmore noted this to be not uncommon around King's Lynn at the start of the 20th century. No records then until Woodbastwick Fen (1993), East Wretham Heath (1993), Grimes Graves (2003) and Roudham Heath (2019). Another fern-feeding species, common and widespread elsewhere in Britain.
Genus Strongylogaster
[Strongylogaster filicis]
No Norfolk records; perhaps extinct, only known from a single old (1873) specimen.
Strongylogaster macula
A local species, commoner in north. Bloomfield noted he'd collected six specimens from the King's Lynn area in the early 1900s, then no records until very recently, from Catfield in 2018 (two trapped) and then one photographed ovipositing on garden ferns in Stoke Holy Cross in 2019.
Strongylogaster mixta
Just two records, a specimen in Norwich Castle Museum from Hoveton (1940) and then one at Bilney Warren in 2017.
Strongylogaster multifasciata
A common species around ferns (especially bracken); previously known as S. lineata. Widespread, particularly widespread in Thetford Forest.
Flight period: 1st May to 9th Aug.
19th century: Bridgman noted that the females were common around ferns but he'd never found the male.
20th century: many locations - all females as far as recorded
21st century: many locations - all females to date
Strongylogaster xanthocera
One caught in a Malaise trap at Fowlmere (Brecks) in 1977 followed by three specimens in Thetford Forest in 2019.
Genus Dolerus
35 species in a number of sub-genera, which partially correspond to the groups identified by Benson. Identification can be tricky, particularly amongst the all-black species.
Loderus per Benson
Benson listed three species in the genus Loderus, which is now subsumed within Dolerus, and is spread across three new subgenera. All of these feed on horsetails Equisetum, as do species in two new subgenera that were part (not all) of Benson's 'red groups' of Dolerus.
Subgenus Loderus
Two species, treated as subspecies of just one by Benson. Both feed on Equisteum.
[Dolerus gilvipes]
[Dolerus pratorum]
Subgenus Dicrodolerus
Dolerus vestigialis
Flight period: 15th Apr to 16th Jun
19th century: records from Norwich and Brundall
20th century: King's Lynn, Wheatfen, Gressenhall, East Bilney, Stanford Water, Buckenham Tofts, Beeston Common
21st century: East Walton Common, Thompson Common, Castle Acre, Shotesham, Wheatfen, Holme, Acle, Frogshall, Wheatfen, Waxham, Thetford, Santon Downham, Devil's Punchbowl, Hardley Flood.
Subgenus Oncodolerus
Dolerus eversmanni
Dolerus per Benson
[red groups]
Subgenus Dolerus
{on Equisetum}
{on Equisetum}
Dolerus aericeps
Sawfly website
Seems quite common and widespread in Britain, and in Norfolk. Sometimes known as D. bajulus.
Flight period: 11th May to 20th Aug. Flies late in the summer compared to most members of the genus
19th century: known from Brundall
20th century: many sites
21st century: many sites
Sawfly website
Seems quite common and widespread in Britain, and in Norfolk. Sometimes known as D. bajulus.
Flight period: 11th May to 20th Aug. Flies late in the summer compared to most members of the genus
19th century: known from Brundall
20th century: many sites
21st century: many sites
Dolerus bimaculatus
Sawfly website
Local nationally (but now clearly not as rare as Benson suggested). Three records now from Norfolk, from East Walton Fen (2007), Waxham (2018) and Shotesham Common (2019).
Sawfly website
Local nationally (but now clearly not as rare as Benson suggested). Three records now from Norfolk, from East Walton Fen (2007), Waxham (2018) and Shotesham Common (2019).
Dolerus cothurnatus
Sawfly website
Local in Norfolk, and apparently quite widespread across Britain.
Flight period: 15th May to 13th Jul
19th century: no records
20th century: East Dereham, Horstead, Buxton Heath, Wells, Blickling, Beeston Common, King's Lynn
21st century: Roydon Common, Castle Acre, East Walton Common
Sawfly website
Local in Norfolk, and apparently quite widespread across Britain.
Flight period: 15th May to 13th Jul
19th century: no records
20th century: East Dereham, Horstead, Buxton Heath, Wells, Blickling, Beeston Common, King's Lynn
21st century: Roydon Common, Castle Acre, East Walton Common
Dolerus germanicus
Sawfly website
Quite widespread in Norfolk although perhaps with a recent decline? Appears to be quite widespread in Britain.
Flight period: 23rd Apr to 16th Aug
19th century: Brundall in 1881
20th century: Wheatfen, Honingham, East Dereham, Sheringham, Aylmerton, Beeston Common, Northrepps, Bodney Warren, Titchwell, East Walton Common, West Harling Common,
21st century: Sutton Fen, Surlingham Church Marsh
Sawfly website
Quite widespread in Norfolk although perhaps with a recent decline? Appears to be quite widespread in Britain.
Flight period: 23rd Apr to 16th Aug
19th century: Brundall in 1881
20th century: Wheatfen, Honingham, East Dereham, Sheringham, Aylmerton, Beeston Common, Northrepps, Bodney Warren, Titchwell, East Walton Common, West Harling Common,
21st century: Sutton Fen, Surlingham Church Marsh
Dolerus yukonensis
Sawfly website
Apparently a northern/western species? There is a single record from a Malaise trap at Fowlmere in 1977 - it would be good to re-examine this specimen if it still exists?
Sawfly website
Apparently a northern/western species? There is a single record from a Malaise trap at Fowlmere in 1977 - it would be good to re-examine this specimen if it still exists?
Subgenus Equidolerus
Another on Equisetum. Not sure why in own subgenus, nested within the above group of species (now subgenus Dolerus) in Benson's keys.
Dolerus pratensis
Subgenus Cyperolerus
{One species on Eleocharis. Keys with Achaetoprion}
Dolerus anticus
Subgenus Achaetoprion
{Four species with larvae on Juncus (last presumed so anyway). First three have red abdomens but last does not; all have black legs. Mesopleura without crater-like punctures. Males all with similar penis-valves}
Dolerus ferrugatus
Flight period: 21st Apr to 15th Jul
19th century: One record at Brundall in the late 19th century.
20th century: Horsey, West Harling, Thompson Common, Holt Lowes, Lenwade, Hoe ROugh, Woodbastwick
21st century: Beeston Common, Thompson Common, Flordon Common, Holme, Shotesham, Brooke
Dolerus madidus
Dolerus triplicatus
Flight period: 1st May to 8th Jul
19th century: considered rare, with one from Sparham in the late 1800s
20th century: King's Lynn, Shipdham, Fowlmere, Fritton Common, Calthorpe
21st century: Shotesham Common, Holme
[Dolerus pachycerus]
No Norfolk records so far, but this is a saltmarsh species known from both Southwold to the south and Spurn to the north, so surely must be present on the coast. This is D. taeniatus in Benson.
Subgenus Poodolerus
{on Poaceae, Cyperaceae}
{on Poaceae, Cyperaceae}
Dolerus aeneus
Sawfly website
Widespread in Norfolk and elsewhere in the UK
Flight period: 7th Apr to 25th Jun
19th century: Norwich, King's Lynn
20th century: Stanford Training Area, West Harling, Thompson Common, Lenwade, Beeston Common, Salthouse Heath, Blickling, Metton, Holt Lowes
21st century: Brandon, Acle, Buckenham Carrs, Waxham, Horsey, Catfield, Holme, Thetford, Shotesham
Dolerus anthracinus
Sawfly website
A very early spring species, apparently on the wing from February to April and favouring chalk grassland. Only two old records from Norfolk - Eaton in the late 19th century (late May) and Wheatfen in 1940. Neither of these obviously seem to fit the suggested habitat and it would be good to re-examine specimens if at all possible.
Dolerus asper
Sawfly website
###records in 1989 and 2014; taxonomic change since Benson may suggest these records need further checking?
Dolerus brevicornis
Sawfly website
###this species was split from D. asper post-Benson. A record exists from West Harling in 1979, which (as the only one to date) would be good to examine more carefully. UPDATE 2019: confirmed male from Shotesham in March (gen. det.)
[Dolerus coracinus]
Sawfly website
No Norfolk records to date. Benson knew the species only from Aviemore, and there are some shown in Northumberland on the NBN, so perhaps a more northern species.
Dolerus fumosus
Sawfly website
##common (known as D. sanguinicollis by Benson)
Dolerus gonager
Sawfly website
##a few old records, then none until six records in 2018 (from Waxham/Horsey, Norwich and Weeting). This seems a surprising pattern worthy of further investigation; identification issues or perhaps a recent range expansion?
Dolerus haematodes
Sawfly website
##another species with old records, then more recent ones in 2016 and 2018.
[Dolerus harwoodi]
Sawfly website
A scarce northern species, with no Norfolk records. Benson noted it only from Inverness (any more since?)
Dolerus liogaster
Sawfly website
##Norfolk records exist but the species has been recently split (to liogaster+schmidti), so may not be possible to confirm definitively yet.
Dolerus niger
Sawfly website
##several recent records
Dolerus nigratus
Sawfly website
##common
Dolerus nitens
Sawfly website
##some older reports, plus a single recent record in 2017
Dolerus picipes
Sawfly website
##common, apparently mostly in Brecks?
Dolerus possilensis
Sawfly website
##a few records including from the Brecks in 2014 and 2018.
Dolerus puncticollis
Sawfly website
##occasional, with recent records
Dolerus schmidti
Sawfly website
##not yet confirmed, but a recent split from D. liogaster and it is possible that some records previously assigned to that species are actually schmidti.}
[Dolerus stygius]
Sawfly website
No Norfolk records to date. Benson notes that it (as D. megapterus) was known only from northern Scotland, plus perhaps also the Manchester area. The NBN also shows a couple of dots in the Midlands.
Dolerus varispinus
Sawfly website
##a few recent records from the east of the county.
Genus Birka
Fairly small sawfly, mostly dark with contrastingly pale tibiae. Note scutellum, tegulae and hind femora all black. Forewing shows typical Selandriinae 'curl' and anal cell has no cross-vein.
Birka cinereipes
Flight period:1st May to 25th Aug
19th century: records from Buckenham and Brundall
20th century: Foulden, Thompson Common, Wheatfen, Blickling, Stiffkey, Kings Lynn, Stanford Training Area
21st century: Sheringham Park (2006), Sutton Fen (2013), Strumpshaw Fen (2018)
Genus Nesoselandria
Nesoselandria morio
Apparently local and seldom recorded to date. Bridgman noted from Brundall in late 19th century, followed by records from King's Lynn (1911-12) and Wheatfen (1938). More recently, recorded from Woodbastwick Fen (1993), Thompson Common (2003), Wayland Wood (2007), Sutton Fen (2016) and Waxham (2018). Appears to be widespread across Britain, with some uncertainty about larval foodplants but they seems to be either low-growing herbs or mosses.
Genus Brachythops
Brachythops flavens
[Brachythops wuestneii]
[Black/yellow sawflies; superficially similar to Athalia but without the "socks". Also easy to not recognise as Selandriinae because the typical curved back vein is not obvious in this genus. All-yellow legs. Pale tegulae.] Two species largely separable on size; one much commoner than the other.
Selandria melanosterna
Much the scarcer of the genus in Norfolk, and in Britain more widely. Bridgman recorded it from Brundall and Heigham in the 1880s, and there were records from Wheatfen in the 1930s. Ken Durrant's collection has a series from Mannington Hall in 1987 and 1988. Otherwise, just single records from Castle Acre (1997) and Shotesham Common (2018). Previously known as S. sixii.
Selandria serva
Flight period: 6 May to 5 Sep.
19th century: Bridgman noted as 'very common at midsummer'
20th century: many locations
21st century: many locations
Pseudohemitaxonus sharpi
Genus Stromboceros
Stromboceros delicatulus
Genus Strongylogaster
[Strongylogaster filicis]
Strongylogaster macula
Strongylogaster mixta
Strongylogaster multifasciata
Flight period: 1st May to 9th Aug.
19th century: Bridgman noted that the females were common around ferns but he'd never found the male.
20th century: many locations - all females as far as recorded
21st century: many locations - all females to date
Strongylogaster xanthocera
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