Key to Tetramorium bonibony-group species
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Based on Hita Garcia and Fisher (2012. The ant genus Tetramorium Mayr (Hymenoptera: Formicidae) in the Malagasy region—taxonomy of the T. bessonii, T. bonibony, T. dysalum, T. marginatum, T. tsingy, and T. weitzeckeri species groups. Zootaxa 3365: 1-123. PDF )
1
- Mesosoma with distinct anterodorsal median protuberance on pronotum (Fig. 29) . . . . . 2
- Mesosoma usually with well-developed anterior face of pronotum, but always without distinct anterodorsal median protuberance on pronotum (Figs. 30, 31) . . . . . 4
 FIGURES 29–31. 29. Mesosoma of T. trafo in profile with distinct pronotal protuberance - CASENT0404115 (William Ericson 2011). 30. Mesosoma of T. sada in profile without distinct pronotal protuberance - CASENT0443274 (William Ericson 2011). 31. Mesosoma of T. kali in profile without distinct pronotal protuberance - CASENT0235221 (William Ericson 2011). |
2
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- Bicoloured species with brown to dark brown head and mesosoma and yellow to light brown waist segments and gaster; propodeal spines very long (PSLI 37 - 44) (Fig. 32) . . . . . Tetramorium bonibony
- Uniformly coloured species; propodeal spines medium-sized to long (PSLI 26 - 31) (Fig. 33) . . . . . 3
3
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- Petiolar node in profile distinctly triangular cuneiform and strongly anteroposteriorly compressed dorsally; in dorsal view highly transverse (LPeI 18 - 27; DPeI 400 - 590) (Fig. 34) . . . . . Tetramorium popell
- Petiolar node in profile less strongly triangular, generally slightly cuneiform and only weakly anteroposteriorly compressed dorsally; in dorsal view less transverse than above (LPeI 48 - 54; DPeI 161 - 188) (Fig. 35) . . . . . Tetramorium trafo
4
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- Antennal scape comparatively longer (SI 76 - 82); anterior mesosoma without well-developed anterior face of pronotum (Fig. 36) . . . . . Tetramorium kali
- Antennal scape comparatively shorter (SI 65 - 73); anterior mesosoma with well-developed anterior face (Fig. 37) . . . . . 5
5
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- Bicoloured species with brown to dark brown head and mesosoma and yellowish to brownish waist segments and gaster (Fig. 38) . . . . . Tetramorium sada
- Uniformly coloured species (Figs. 39, 40) . . . . . 6
 FIGURES 38–40. 38. Body of T. sada in profile with conspicuous bicolouration - CASENT0443274 (William Ericson 2011). 39. Body of T. nosybe in profile with uniform dark brown colouration - CASENT0422207 (William Ericson 2011). 40. Body of T. vony in profile with uniform yellow colouration - CASENT0404272 (William Ericson 2011). |
6
return to couplet #5
- Body colouration brown to dark brown (Fig. 41) . . . . . Tetramorium nosybe
- Body colouration yellow to light brown (Fig. 42) . . . . . 7
7
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- Petiolar node cuneiform, in profile less anteroposteriorly compressed dorsally, in dorsal view less transverse (LPeL 45 - 50; DPeL 183 - 200) (Fig. 43) . . . . . Tetramorium olana
- Petiolar node triangular cuneiform, in profile strongly anteroposteriorly compressed dorsally, in dorsal view highly transverse (LPeL 31 - 40; DPeL 245 - 333, generally around 300) (Fig. 44) . . . . . Tetramorium vony
