Key to Tyrannomyrmex Species

This worker key is based on: Sadasivan, K. and Kripakaran, M. 2017. A new species of Tyrannomyrmex Fernández 2003 (Formicidae, Myrmicinae, Solenopsidini) from Western Ghats, Kerala, India. Zootaxa. 4344:261–276.

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• Tyrannomyrmex

1

Figure 12. Foveae on lateral pronotum: A—T. rex, B—T.alii and C—T.legatus.

• In lateral view, petiolar peduncle clearly differentiated from the node, peduncle forming anterior half of the petiole; foveae dense and contiguous on side of pronotum. Agasthyamalais, Kerala, India . . . . . . Tyrannomyrmex dux

• Petiolar peduncle not clearly differentiated from the node . . . . . 2

2

return to couplet #1

• Foveae on lateral pronotum widely separated, sparse and irregularly placed; inter-foveal distance more than diameter of foveae (Fig. 12); erect hairs restricted to the anterior pronotum, rest of the mesosoma devoid of any hair. Peninsular Malaysia . . . . . . Tyrannomyrmex rex

• Foveae on lateral pronotum more closely spaced, denser and more regular; inter-foveal distance less than the diameter of the individual foveae; whole mesosoma bearing hairs . . . . . 3

3

return to couplet #2

• Foveae on lateral pronotum contiguous (Fig. 12); whole mesosoma covered in erect hairs. Sri Lanka . . . . . . Tyrannomyrmex legatus

• Foveae on lateral pronotum never contiguous, inter-foveal distance less than foveal diameter but more than the radius of the individual foveae; erect hairs occupying the entire pronotum and grading to decumbent and appressed towards the propodeum. Periyar, Kerala, India . . . . . . Tyrannomyrmex alii