Photo © Mike Wall
Sorhagenia janiszewskae
Checklist Number34.014 [B&F: 0910]
Verification
Record requires retention of specimen until confirmed, and may require dissection. Consult with CMR if unsure
Classification
| Family: | Cosmopterigidae |
| Subfamily: | Chrysopeleiinae |
| Genus: | Sorhagenia |
| Species: | janiszewskae |
| Authority: | Riedl, 1962 |
Nationally scarce (Na) in heathland and woodland in parts of southern England. In Hampshire by far the most widespread of the three Sorhagenia species, found in places like the New Forest, Emer Bog, Botley Wood and Wickham Common but in the northern half of the county restricted to very few sites. Not recorded from the Isle of Wight to date. Wingspan 10-13 mm. Can only be separated from S. rhamniella and S. lophyrella by dissection of the genitalia. Larva mines twigs of Alder Buckthorn and Buckthorn, living between flowers and shoots spun together with silk.
The abundance in each month is indicated as follows:
No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time| J | F | M | A | M | J | J | A | S | O | N | D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adult | | | | | | | | | | | | |
| Larval | | | | | | | | | | | | |
Records by week (adult)
Records by week (larval)
VC11 South Hampshire
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Matley Bog, NF (SU30) | 1965 | - | Anon | - |
| Wickham Common (SU51) | 20/08/1974 | one | Richard J Dickson | Adult |
| Wickham Common (SU51) | 02/07/1975 | 20 | Richard J Dickson | Mine (vacated) |
| Browndown north (SZ59) | 05/07/1975 | two | Richard J Dickson | Mine |
| Botley Wood (SU50) | 10/07/1975 | one | Richard J Dickson | Mine |
| Balmer Lawn, NF (SU30) | 29/07/1977 | four | Richard J Dickson | Adult |
| Matley Bog, NF (SU30) | 1979 | - | Anon | - |
| Southsea (SZ69) | 29/07/1983 | one | John R Langmaid | Adult |
| Emer Bog NR (SU32) | 04/05/1987 | - | J R Langmaid, D H Sterling | Larval |
| Matley Bog, NF (SU30) | 08/08/1987 | one | J R Langmaid, E C Pelham-Clinton | Adult |
| Botley Wood (SU50) | 27/05/1990 | - | J R Langmaid, R J Heckford | Larval |
| Havant Thicket (SU71) | 02/06/1991 | - | J R Langmaid, R J B Hoare | Larval |
| Botley Wood (SU51) | 03/06/1991 | - | J R Langmaid, R J Dickson | Larval |
| Botley Wood (SU50) | 03/06/1991 | - | Richard J Dickson | Larval |
| Botley Wood (SU50) | 04/05/1993 | - | John R Langmaid | Larval |
| Emer Bog NR (SU42) | 05/06/1993 | - | J R Langmaid, D H Sterling | Larval |
| Botley Wood (SU50) | 17/06/1993 | - | J R Langmaid, R M Palmer | Larval |
| Emer Bog NR (SU32) | 07/05/1994 | - | J R Langmaid, B Goater, S A Knill-Jones | Larval |
| Wickham Common (SU51) | 22/06/1994 | - | Richard J Dickson | Larval feeding signs |
| Havant Thicket (SU71) | 28/05/1995 | - | J R Langmaid, R J Heckford | Larval |
| Havant Thicket (SU71) | 05/05/1997 | - | J R Langmaid, I R Thirlwell | Larval |
| Wickham Common (SU51) | 02/06/2000 | - | Richard J Dickson | Larval |
| Wickham Common (SU51) | 09/06/2000 | - | Richard J Dickson | Larval |
| Wickham Common (SU51) | 14/06/2000 | - | Richard J Dickson | Larval feeding signs |
| Wickham Common (SU51) | 25/07/2001 | one | Richard J Dickson | Adult |
| Wickham Common (SU51) | 03/08/2001 | one | Richard J Dickson | Adult |
| Wickham Common (SU51) | 10/08/2001 | one | Richard J Dickson | Adult |
| Pig Bush (SU30) | 04/07/2002 | - | J R Langmaid, B Elliott | Larval feeding signs |
| Wickham Common (SU51) | 26/05/2005 | - | J R Langmaid, I R Thirlwell | Larval feeding signs |
| Fiddlers Green (SU50) | 05/05/2006 | - | J R Langmaid, I R Thirlwell | Larval |
| Botley Wood (SU50) | 06/08/2007 | one | Keith Wheeler | Adult |
| Romsey (SU32) | 20/07/2023 | one | Nigel R Jones | Adult |
| Romsey (SU32) | 27/07/2023 | one | Nigel R Jones | Adult |
VC12 North Hampshire
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Silchester Common (SU66) | 26/05/1991 | - | J R Langmaid, R J Heckford, B R Baker, J Robbins | Larval |
| Newtown Common (SU46) | 08/06/1991 | - | John R Langmaid | Larval |
| Pamber Forest (SU66) | 17/07/2018 | one | Mark Hammond, Keith Tailby, Graham Dennis | Adult |
| Cliddesden (SU64) | 03/08/2018 | one | Mike Wall | Adult |
| Basingstoke (SU65) | 01/08/2019 | one | Mike Wall | Adult |
| Pamber Forest (SU66) | 02/07/2021 | one | Graham Dennis | Mine (vacated) |
| Fleet (SU85) | 03/08/2021 | one | Mike Halsey | Adult |
| Tidgrove Warren, nr Overton (SU55) | 07/07/2023 | one | Mike Wall & Andrew Bolton | Adult |
| Fleet Pond (SU85) | 10/08/2023 | one | Mike Halsey | Adult |
