Calliopum aeneum (Fallén, 1820)
According to some sources the larva causes a swelling of the ovary of Viola tricolor; it also has been considered a stem miner of Trifolium pratense. However, Semelbauer & Kozánek reared the larva from egg to puparium on rotting leaves of Prunus avium. This suggests that the species is an aspecific detritus-feeder, like most of its congeners.
Houard (1909a), Semelbauer & Kozánek (2012a), Spooner & Bowdrey (2012a).