Key to Trachymyrmex opulentus species group workers

This worker key is based on: [[Media:Brandão 2002.pdf|Mayhé-Nunes, A. J. and Brandão, C. 2002. Revisionary studies on the attine ant genus Trachymyrmex Forel. Part 1: definition of the genus and the opulentus group (Hymenoptera: Formicidae). Sociobiology. 40: 667-698. PDF]]

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 * Trachymyrmex
 * Trachymyrmex species groups

1

 * Lateral projections on the pronotum lower than anterior mesonotal projections . . . . . 2


 * Lateral projections on the pronotum higher than anterior mesonotal projections . . . . . 3

2
return to couplet #1
 * Superior corners of the head with a spine or teeth on each side; pair of blunt but distinct carinae on vertex . . . . . Trachymyrmex opulentus


 * Superior corners of the head rounded, without spines or teeth; carinae on vertex absent . . . . . Trachymyrmex dichrous

3
return to couplet #1
 * Propodeal spines slender: border of frontal lobes smooth . . . . . Trachymyrmex relictus


 * Propodeal spines stouter and shorter, smaller than the distance between its base and the propodeal spiracle; border of frontal lobes strongly crenate . . . . . Trachymyrmex compactus