Key to Polyrhachis mucronata-group species
This worker key is based on: Kohout, R.J. 2008a. A review of the Polyrhachis ants of Sulawesi with keys and descriptions of new species (Hymenoptera: Formicidae: Formicinae). Memoirs of the Queensland Museum. 52:255-317.
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1
- Pronotal humeri produced into slender, acute spines . . . . . Polyrhachis amana
- Pronotal humeri angular or produced into broad-based short teeth . . . . . 2
2
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- Body with rather dense, closely appressed, silvery-white or greyish pubescence . . . . . Polyrhachis retrorsa
- Body jet-black with only very diluted appressed pubescence arising from minute shallow pits . . . . . 3
3
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- Petiole with short lateral spines that are as long as, or shorter than distance between their bases; no intercalary spines present; pronotal humeri rounded, with or without indication of rudimentary teeth . . . . . Polyrhachis arborea
- Petiole with relatively long lateral spines, conforming to shape of first gastral segment, and pair of intercalary teeth; pronotal humeri distinctly toothed . . . . . 4
4
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- Petiolar spines rather broad and massive; propodeal spines about as long as distance between their bases; generally black with coxae and proximal ends of femora distinctly light to medium reddish-brown . . . . . Polyrhachis manni
- Petiolar spines very slender; propodeal spines distinctly longer than distance between their closely approximate bases; generally black with legs dark reddish-brown; coxae a shade lighter . . . . . Polyrhachis hippomanes