Key to Tranopelta species

This key to species of Tranopelta is based on Fernández (2003).

Workers

 * Promesonotum and propodeum each strongly convex in side view, clearly split by a deep metanotal groove; scapes approaching or slightly surpassing the vertexal border; Ecudar, Brazil, Bolivia . . . . . Tranopelta subterranea
 * Promesonotum and propodeum continuous in side view (Fig. 2A0; scapes ending before the vertexal border; Costa Rica to Brazil . . . . . Tranopelta gilva

Queens

 * Scape of antennae surpassing the vertexal border; eyes < 0.50 mm in length . . . . . Tranopelta subterranea
 * Scape of antennae not surpassing in the vertexal border; eyes > 0.50 mm in length . . . . . Tranopelta gilva

Males

 * Eyes closer to posterior clypeal margin than to ocellus; mandibles crossing when closed . . . . . Tranopelta subterranea
 * Eyes equidistant between ocelli and clypeal margin; mandibles never touching . . . . . Tranopelta gilva