Key to Sulawesi Polyrhachis aequalis-group species

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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 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
Polyrhachis trispinosa casent0103196 head 1.jpg
Polyrhachis trispinosa casent0103196 profile 1.jpg

2

return to couplet #1

  • Body generally light reddish-brown, with appendages and gaster a shade darker . . . . . Polyrhachis deceptor
Polyrhachis deceptor casent0103186 head 1.jpg
Polyrhachis deceptor casent0103186 profile 1.jpg
  • 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
Polyrhachis-aequalis HUMCZ001H.jpg
Polyrhachis-aequalis HUMCZ001L.jpg
  • 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
Polyrhachis incognita casent0103188 head 1.jpg
Polyrhachis incognita casent0103188 profile 1.jpg
  • Body very dark reddish-brown to black, appendages and gaster medium to dark reddish-brown; propodeal spines relatively long and slender . . . . . Polyrhachis imitator
Polyrhachis imitator casent0217432 h 1 high.jpg
Polyrhachis imitator casent0217432 p 1 high.jpg