Centromyrmex

Bolton, Barry & Fisher, Brian L., 2008, Afrotropical ants of the ponerine genera Centromyrmex Mayr, Promyopias Santschi gen. rev. and Feroponera gen. n., with a revised key to genera of African Ponerinae (Hymenoptera: Formicidae), Zootaxa 1929, pp. 1-37 : 8

Key to world species groups of Centromyrmex (workers and queens)

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 group

2 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 group

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