File:Zookeys-394-001-g021.jpg

Figure 21. Vertex of ergatoid queens in voeltzkowi species group. A Mystrium eques (CASENT0418311) B Mystrium shadow (CASENT0077647: paratype). A, B head in posterior 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