Photo © Andy Mitchell
Stigmella assimilella
Checklist Number04.040 [B&F: 0074]
Verification
Record requires retention of specimen until confirmed, and may require dissection. Consult with CMR if unsure
Classification
| Family: | Nepticulidae |
| Subfamily: | Nepticulinae |
| Genus: | Stigmella |
| Species: | assimilella |
| Authority: | (Zeller, 1848) |
Local in woodland throughout much of south-eastern England and in the Scottish Highlands. Probably under-recorded in Hampshire, where the extent of known records correlate with those areas in which the recording effort is concentrated. Not recorded from the Isle of Wight since 1973. Wingspan 5.4-6.2 mm. Adults difficult to distinguish from other Stigmella species, and more frequently recorded in the larval stage, when mines are relatively easy to find where they are present. Larva mines leaves of Aspen, over-wintering as a pupa.
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)
VC10 Isle of Wight
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| St Helens (SZ68) | 29/09/1973 | - | D W H Ffennell | Larval |
VC11 South Hampshire
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Botley Wood (SU51) | 1980 | - | John R Langmaid | - |
| Browndown (SZ59) | 26/08/1985 | - | J R Langmaid, D H Sterling | Mine (vacated) |
| Havant Thicket (SU71) | 26/10/1986 | - | J R Langmaid, D H Sterling | Mine (vacated) |
| Hayling Island (SZ79) | 01/11/1990 | - | John R Langmaid | Mine |
| Botley Wood (SU50) | 03/11/1990 | - | John R Langmaid | Mine (vacated) |
| Botley Wood (SU51) | 1991 | - | Richard J Dickson | Larval |
| Hayling Island (SZ79) | 16/07/1991 | - | John R Langmaid | Mine |
| Botley Wood (SU50) | 30/09/1991 | one | J R Langmaid, R J Dickson | Mine |
| Hayling Island (SZ79) | 03/11/1992 | - | John R Langmaid | Mine (vacated) |
| Hayling Island (SZ79) | 17/10/1996 | - | J R Langmaid, I R Thirlwell | Mine |
| Hayling Island (SZ79) | 02/09/1997 | - | J R Langmaid, I R Thirlwell | Mine |
| Cams Bay, Fareham (SU50) | 10/10/1997 | two | J R Langmaid, D J L Agassiz, J C Koster | Mine (vacated) |
| Hayling Island (SZ79) | 14/10/1997 | - | J R Langmaid, J C Koster | Larval |
| Hayling Island (SZ79) | 07/09/1998 | one | J R Langmaid, M G M Jansen | Mine (vacated) |
| Browndown (SZ59) | 17/09/2002 | - | J R Langmaid, B Elliott | Mine |
| Havant Thicket (SU71) | 12/11/2003 | - | J R Langmaid, B Elliott | Mine (vacated) |
| Hayling (SZ69) | 23/08/2005 | - | J R Langmaid, B Elliott | Mine (vacated) |
| Bell's Copse, Havant Thicket (SU71) | 02/10/2007 | - | J R Langmaid, B Elliott | Mine |
| Havant Thicket (SU71) | 26/09/2008 | two | J R Langmaid, A M Davis | Mine |
| Hayling Island (SZ79) | 29/09/2009 | one | J R Langmaid, B Elliott | Mine (vacated) |
| Hayling Island (SZ79) | 03/09/2010 | one | J R Langmaid, M R, J E Young | Mine (vacated) |
| Oxleys Coppice, Fareham (SU50) | 05/10/2011 | two | J R Langmaid, R J Dickson | Mine (vacated) |
| Botley Wood (SU50) | 15/09/2012 | two | Tony Davis | Mine (vacated) |
| Havant Thicket (SU71) | 07/10/2014 | three | J R Langmaid, M R Young | Mine |
| Staunton CP (SU70) | 04/11/2014 | - | J R Langmaid, I R Thirlwell | Mine (vacated) |
| Hayling (SZ69) | 04/10/2015 | one | J R Langmaid, M R, J E Young | Mine (vacated) |
| Marwell Zoological Park (SU52) | 12/09/2016 | one | David S Hubble | Mine |
| Staunton CP (SU70) | 02/11/2016 | - | J R Langmaid, J W Phillips | Mine |
| Hayling (SZ69) | 05/09/2019 | - | J R Langmaid, J W Phillips | Mine (vacated) |
| Hayling Island (SZ79) | 05/09/2019 | one | J R Langmaid, J W Phillips | Mine (vacated) |
| Staunton CP (SU70) | 17/09/2019 | one | J R Langmaid, I R Thirlwell & J W Phillips | Mine (vacated) |
| Botley Wood (SU50) | 26/09/2021 | four | Dan Houghton | Mine (vacated) |
| Botley Wood (SU50) | 17/10/2021 | one | David Wallace | Mine (vacated) |
| Botley Wood (SU50) | 06/08/2022 | - | Dan Houghton | Mine (vacated) |
| Portswood (SU41) | 09/11/2023 | - | Jack Oughton | Mine |
VC12 North Hampshire
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Fleet Pond (SU85) | 07/10/1997 | - | David G Green | Larval |
| Fleet (SU75) | 29/08/2003 | one | Rob Edmunds | Larval |
| Fleet (SU75) | 17/10/2004 | - | Rob Edmunds | Larval |
| Fleet (SU75) | 10/09/2005 | - | Rob Edmunds | Larval |
| Pamber Forest (SU66) | 05/09/2006 | - | J R Langmaid, B Elliott | Mine (vacated) |
| Fleet (SU75) | 03/10/2007 | - | Rob Edmunds | Mine |
| Butterwood, Greywell (SU75) | 11/10/2007 | - | Rob Edmunds, Tim Norriss, Paul Boswell | Mine |
| Fleet (SU75) | 08/11/2007 | - | Rob Edmunds | Mine |
| Black Wood, Micheldever (SU54) | 10/10/2011 | - | David G Green | Larval |
| Axmansford (SU56) | 18/10/2014 | one | Andy C Bolton | Mine |
| Yateley Common (SU85) | 17/09/2021 | - | Josie Hewitt | Mine |
| Yateley Common (SU85) | 27/05/2022 | one | Ben Dale | Adult |
| Castle Bottom NNR (SU75) | 26/08/2023 | - | Tony Davis | Mine (vacated) |
VC22 West Berkshire (Hants county)
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Burnt Common (SU66) | 02/10/2004 | one | Graham Dennis | Mine |