Key to Tyrannomyrmex Species

The following key to Tyrannomyrmex species is based on Alpert (2013).

1

 * Erect hairs on mesosomal dorsum very short, confined to anterior of pronotum, foveolae small and sparse, individual foveolae widely separated. Peninsular Malaysia => Tyrannomyrmex rex
 * Dorsum of mesosoma with numerous long erect hairs scattered over the entire surface, foveolae large and dense, individual foveolae approximate to each other => 2

2

 * In lateral view, peduncle of petiole clearly differentiated, extending gradually into the anterior slope of the node. Anterovental projection of petiole absent. India => Tyrannomyrmex dux
 * In lateral view, peduncle of petiole not clearly differentiated, with an abrupt anterior slope of the node. Anteroventral projection of petiole present. Sri Lanka => Tyrannomyrmex legatus