Diagnostic characters for workers of all species-groups outlined in this paper. Lateral view of mesosoma, petiole and postpetiole of a member of the hafahafa species-group (7), dorsal view of mesosoma, petiole and postpetiole of angulatus species-group (8), dorsal view of mesosoma, petiole and postpetiole of madecassus species-group (9), lateral view of mesosoma, petiole and postpetiole of madecassus species-group (10), lateral view of mesosoma, petiole and postpetiole of sikorai species-group (11). For details see main text.

 
 
  Part of: Csősz S, Fisher BL (2015) Diagnostic survey of Malagasy Nesomyrmex species-groups and revision of hafahafa group species via morphology based cluster delimitation protocol. ZooKeys 526: 19-59. https://doi.org/10.3897/zookeys.526.6037