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. 2014 Mar 31;(394):1–99. doi: 10.3897/zookeys.394.6446

Figure 22.

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.