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| Record Summary | aborted linear mines in Holly leaves |
| Found as | Larva |
| Date | 22 July 2010 |
| Associated organism | Ilex aquifolium |
| OS grid ref | OSGR: SY98 |
| Lat/Lon | 50° 40’ N, 2° 0’ W |
| Vice County | Dorset, VC no: 9 |
| Country | England |
Notes:
The mines appeared to be filled with scar tissue.
Dr. Willem N. Ellis comments: "Linear mines on Holly have been attributed to parasitism, and to Phytomyza ilicola, a North American species that does make linear mines. In fact, when the larva of P. ilicis leaves the corridor in the midrib that it has made before and during the winter, it must immediately make a blotch: eat tissue away all round. If the larva only eats tissue right in front of it for too long, it will lose the space to move. This is the combined effect of the toughness of the Holly leaves, and the speed with which scar tissue (callus) is formed. Almost all linear mines that you open end with a larva that has been squeezed to death. Hering called it "der Flucht für dem Callus" - the flight for the callus."
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