File:Blaimer 2012 Orthocrema 19-23.jpg

Figures 19–23. Species key to the queens of Malagasy Crematogaster (Orthocrema). 19 clypeus without median notch (C. madecassa, CASENT0040391) 20 clypeus with median notch (C. razana, CASENT0148782) 21 scuto-scutellar suture broadly meeting mesoscutum (C. volamena, CASENT0161415) 22 occipital carinae distinct (C. volamena, CASENT0161415) 23 scuto-scutellar suture acutely meeting mesoscutum (C. mpanjono, CASENT0067033).

Blaimer, B.B. 2012. Taxonomy and species-groups of the subgenus Crematogaster (Orthocrema) in the Malagasy region (Hymenoptera, Formicidae). ZooKeys, 199, 23-70. doi:10.3897/zookeys.199.2631