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Nationally scarce (Na) in urban areas and on old buildings in southern England. First recorded in Hampshire in 2013. Wingspan 10-12 mm. Very similar to B. dryadella and often only separable by dissection of the genitalia, however shape of fascia is straight or slightly inwards-bent in B. dryadella, but slightly outwards-bent and rarely straight in B. basaltinella (MBGBI Vol 4 part 2). Larva feeds on various mosses, living within a silken tube or tent.
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Flightime guide |
| Stage | J | F | M |
A | M | J |
J | A | S |
O | N | D |
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Detail records |
| Site | Date | Quantity | Recorder | Stage |
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| VC11 South Hampshire |
| Hengistbury Head (SZ19) | 29-Jun-2013 | one | Jeffes, Mike | Adult |
| Southsea (SZ69) | 15-Aug-2013 | one | Langmaid, John | Adult |
| Southsea (SZ69) | 12-Jul-2014 | one | Langmaid, John | Adult |
| Southsea (SZ69) | 03-Jul-2015 | one | Langmaid, John | Adult |
| Southsea (SZ69) | 17-Jun-2017 | one | Langmaid, John | Adult |
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