1	Dorsum of promesonotum with conspicuous longitudinally rugose/rugulose sculpture (Fig. 4A, B)	2
–	Dorsum of promesonotum unsculptured, smooth, and usually very shiny (Fig. 4C, D)	3
2	Slightly smaller species (WL 0.88–0.93); propodeum armed with shorter, triangular, and acute teeth (PSLI 10–11); dorsum of promesonotum longitudinally rugulose with very little ground sculpture, lateral pronotum mostly unsculptured and shiny, only dorsally longitudinally rugulose; generally of uniform dark brown colour; rainforest species (Fig. 5A, B) [Cameroon, Nigeria]	Tetramorium raptor
–	Slightly larger species (WL 0.98–1.06); propodeum armed with longer, triangular to elongate-triangular, and acute teeth (PSLI 16–18); dorsum of promesonotum and lateral pronotum strongly longitudinally rugose with distinct punctate ground sculpture; strongly bicoloured species with dark brown or black gaster contrasting with light brown to reddish brown on remainder of body; savannah species (Fig. 5C, D) [Cameroon, Ghana, Guinea, Nigeria, and Republic of the Congo]	Tetramorium uelense
3	Generally larger species (WL 1.02–1.16); propodeal teeth relatively longer (PSLI 17–19); petiolar node in profile relatively higher, in profile 1.2 to 1.3 times higher than long (LPeI 77–82); strongly bicoloured species with dark brown or black gaster contrasting with light brown to reddish brown remainder of body (Fig. 6A) [Kenya, Tanzania, and Zimbabwe]	Tetramorium decem
–	Generally smaller species (WL 0.85–0.98); propodeal teeth relatively shorter (PSLI 9–13); petiolar node relatively lower, in profile around 1.0 to 1.2 times higher than long (LPeI 86–100); usually of uniform brown colour, if bicoloured, then only slightly so and never as well developed as above (Fig. 6B)	4
4	Smaller eyes (OI 33–36); body colouration uniformly light brown to chestnut brown (Fig. 7A, B) [Kenya, Mozambique, Tanzania, Zambia, and Zimbabwe]	Tetramorium ultor
–	Larger eyes (OI 37–40); body colouration uniformly dark brown to black, always darker than above (Fig. 7C, D) [Central African Republic, Cameroon, Democratic Republic of Congo, Gabon, Ghana, Kenya, Liberia, Tanzania, Uganda]	Tetramorium venator