Key to Sulawesi Polyrhachis aequalis-group species

This worker key is based on: [[Media:Kohout 2008a.pdf|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. PDF]]

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 * Polyrhachis aequalis species-group
 * subgenus Myrmothrinax
 * Polyrhachis

1

 * Pronotal humeri with distinct teeth or short spines . . . . . 2


 * Pronotal humeri widely rounded, without teeth or spines; petiolar spines very short with middle spine shorter or rudimentary in some specimens . . . . . Polyrhachis trispinosa

2
return to couplet #1
 * Body generally light reddish-brown, with appendages and gaster a shade darker . . . . . Polyrhachis deceptor


 * Body generally black, or dark reddish-brown, with appendages sometimes a shade lighter . . . . . 3

3
return to couplet #2
 * Smaller species (HL <1.56); pronotal humeri produced into short teeth . . . . . Polyrhachis aequalis


 * Larger species (HL >1.65); pronotal humeri produced into short, distinct spines . . . . . 4

4
return to couplet #3
 * Body and appendages black; propodeal spines relatively short, wide-based, somewhat triangular in lateral view . . . . . Polyrhachis incognita


 * Body very dark reddish-brown to black, appendages and gaster medium to dark reddish-brown; propodeal spines relatively long and slender . . . . . Polyrhachis imitator