Key to Polyrhachis cryptoceroides-group species
This worker key is based on: Kohout, R.J. 2006a. A review of the Polyrhachis cryptoceroides species-group with description of a new species from Thailand. Myrmecologische Nachrichten. 8:145-150.
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1
- Virtually unicoloured; body black, appendages black or dark reddish-brown; anterior clypeal margin deeply emarginate medially (Thailand, Malaysia, Indonesia, Brunei, Philippines) . . . . . Polyrhachis cryptoceroides
- Distinctly bicoloured; body black, appendages yellow to light reddish-brown; anterior clypeal margin with truncate, medially notched flange, flanked by distinct angles or acute denticles . . . . . 2
2
return to couplet #1
- Lateral margins of mesosoma distinct for most of their length; metanotal groove weakly indicated . . . . . 3
- Lateral margins of mesosoma indistinct; metanotal groove lacking (India) . . . . . Polyrhachis wroughtonii
3
return to couplet #2
- Head and mesosoma finely reticulate-punctate; clypeus smoothly rounded, without distinct median carina (Sri Lanka) . . . . . Polyrhachis jerdonii
- Head and mesosoma coarsely reticulate-punctate; clypeus with strongly raised median carina (Thailand) . . . . . Polyrhachis thailandica