J. Tomminen & P. Leppänen 1991: The Male Genitalia of Monochamus sutor (L), Mytilus galloprovincialis (Olivier) and M. urussovi (Vonwaldheim,Fischer) (Coleoptera, Cerambycidae). - Entomologica Fennica 2: 49-51.
Comparison of the male genitalia of the three Monochamus species occurring in Finland revealed differences in the structure and size of the median lobe: the shape of the apex is rounded in M. sutor, whereas in M. galloprovincialis it is slightly concave. M. urussovi has a completely flattened apex and the uppermost part of the basal struts extends far upward, almost reaching the apex. The length of the median lobe is distinctly larger in M. urussovi than in the two other species.