Key to Centromyrmex species groups

The genus Centromyrmex occurs in three regions and includes 15 species and 2 subspecies. These can conveniently be separated into four species groups. The keys below include a key to the species groups, which is based on Bolton & Fisher (2008)

1

 * Mesotibia with 1 or 2 spurs. Procoxa not hypertrophied. Protibia not inflated. Pronotum not marginate anterodorsally . . . . . 2


 * Mesotibia without spurs. Procoxa hypertrophied. Protibia inflated. Pronotum marginate anterodorsally. (Afrotropical, Oriental, Malesian) . . . . . feae species group

2
return to couplet 1


 * Mesotibia with 1 spur. Propodeal spiracle not high on side, not very close to dorsal margin of mesosoma. Apical tooth of mandible weakly or not differentiated, not inflected but more or less continuing the line of the long axis of the mandible. Monomorphic species . . . . . 3


 * Mesotibia with 2 spurs. Propodeal spiracle high on side, very close to dorsal margin of mesosoma. Apical tooth of mandible strongly differentiated and inflected, not continuing the line of the long axis of the mandible. Polymorphic species. (Afrotropical) . . . . bequaerti species group

3
return to couplet 2


 * Ventral process of petiole consisting of two stout teeth. Metasternal process a pair of elongate, narrowly triangular spines. Mesotibial spur pectinate. (Malesian) . . . . . . hamulatus species group


 * Ventral process of petiole consisting of a single keel. Metasternal process a pair of low rounded tumuli or low triangular crests. Mesotibial spur simple to weakly barbulate. (Neotropical) . . . . . . brachycola species group