Key to Polyrhachis cryptoceroides-group species

This worker key is based on: [[Media:Kohout 2006a.pdf|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. PDF]]

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 * Polyrhachis
 * subgenus Myrmhopla
 * Polyrhachis cryptoceroides species-group

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