File:Zookeys-394-001-g019.jpg

Figure 19. Clypeus of workers in voeltzkowi species group. A Mystrium shadow (CASENT0318933: holotype) B Mystrium voeltzkowi (CASENT0002075). Yoshimura, M. & Fisher, B.L. 2014. A revision of the ant genus Mystrium in the Malagasy region with description of six new species and remarks on Amblyopone and Stigmatomma (Hymenoptera, Formicidae, Amblyoponinae). ZooKeys 394, 1–99. doi:10.3897/zookeys.394.6446