Tetramorium camerunense species group

Based on Bolton 1980.

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Diagnosis
1. antennae 12-segmented

2. antennal scape relatively small to moderate (SI < 90)

3. anterior clypeal margin generally with small median impression (absent in one species)

4. frontal carinae long and fine, generally reaching posterior eye margin, sometimes running to occipital margin

5. antennal scrobe weakly developed

6. propodeal spines of varying length, but always longer than propodeal lobes

7. mandibles generally smooth and shining, rarely finely striate

8. clypeus with three longitudinal rugae

9. cephalic dorsum usually finely longitudinally rugulose, without cross-meshes; occipital rugoreticulum never developed

10. all dorsal body surfaces with numerous standing hairs

11. dorsal surfaces of hind tibiae generally with decumbent to appressed pubescence only, in two species suberect

12. sting appendage triangular, dentiform or pennant-shaped Prior to this study, the T. camerunense species group contained 12 species that were subdivided into two species complexes based on differences in sculpturation (Bolton 1980). The T. lucayanum complex, containing four species, can be characterized by the presence of sculptured mandibles, petiole and postpetiole. One or both of the waist segments are generally strongly sculptured. The other and larger complex, the T. camerunense complex with eight species, possesses typically unsculptured waist segments and mandibles.