Ophiomyia stenophaga Pakalniškis, 1998
The larva makes a, hardly visible, up to a meter long, linear mine in the bark of the stem. The mine starts in the top, is then very narrow, and descends gradually broadening down to close to the root collar. The puparium is formed externally.
Campanula latifolia, trachelium.
distribution within Europe
Shining black; rear spiraculum with 15-17 papillae.
The 22 larvae that were found on Campanula trachelium all were dead; perhaps not the correct host plant?
Pakalniškis (1998c), Papp & Černý (2015a).