File:Zookeys-394-001-g022.jpg

Figure 22. Clypeus of ergatoid queens in voeltzkowi species group. A Mystrium eques (CASENT0418317: paratype) B Mystrium oberthueri (CASENT0496064). A, B head in full-face view.

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