Key to Polyrhachis Chariomyrma select Australian species

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This worker key is based on: Kohout, R.J. 2008. Two new species of Polyrhachis Fr. Smith from Australia, based on formerly quadrinomial taxa. Australian Entomologist. 35:161-171.

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  • Head and mesosoma distinctly metallic green, blue or purple or a combination of these colours . . . . . Polyrhachis hookeri
Polyrhachis hookeri casent0910828 h 1 high.jpg
Polyrhachis hookeri casent0910828 p 1 high.jpg
  • Head and mesosoma uniformly very dark brown or black . . . . . 2


return to couplet #1

  • Dorsum of gaster with a distinct longitudinal patch of very dark maroon or purple-coloured, closely appressed pubescence; body with rather irregular, reticulate-rugose sculpturation . . . . . 3
  • Dorsum of gaster without such a patch, with golden or coppery pubescence uniformly distributed over gastral dorsum; body sculpturation generally longitudinally striate-punctate with striae on pronotal dorsum U-shaped medially and oblique across humeral angles . . . . . Polyrhachis cydista
Polyrhachis cydista casent0903350 h 1 high.jpg
Polyrhachis cydista casent0903350 p 1 high.jpg


return to couplet #2

  • Propodeal spines relatively short, divergent, weakly elevated from their somewhat broadened bases and dorso-ventrally flattened; gaster reddish-brown, distinctly lighter than dorsum ofmesosoma . . . . . Polyrhachis obscura
Polyrhachis obscura casent0906754 h 1 high.jpg
Polyrhachis obscura casent0906754 p 1 high.jpg

  • Propodeal spines longer, with their length almost equal to distance between their bases, gently curved, with their tips projecting posteriorly; gaster very dark with distinct green metallescence . . . . . Polyrhachis lownei
Polyrhachis lownei casent0903349 h 1 high.jpg
Polyrhachis lownei casent0903349 p 1 high.jpg