Key to Sulawesi Polyrhachis aequalis-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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• 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