Key to Alfaria species

Identification key to workers and gynes of the Gnamptogenys minuta-group species based on Dias & Lattke (2019).

1

 * Propodeum with a pair of denticles
 * Propodeum continuous, denticles absent

2

 * Integument mostly opaque, sculpturing predominantly granulose with variable degrees of areolae/foveolae
 * Integument mostly shiny or silky, sculpturing can be finely striolate or smooth with variable degrees of areolae/foveolae

3

 * Mandible falcate, masticatory margin edentate and concave (north-central Venezuela) Gnamptogenys fieldi
 * Mandible triangular, masticatory margin fairly straight and denticulate or crenulate

4

 * Metanotal groove well-impressed; spiracles of abdominal segments I and II shining and conspicuous (northwestern Venezuela) Gnamptogenys petiscapa
 * Metanotal groove absent; spiracles of abdominal segments I and II opaque and not conspicuous (southern Mexico to Brazil) Gnamptogenys minuta

5

 * Mandible falcate (northern South America) Gnamptogenys falcifera
 * Mandible triangular

6

 * Eye not prominent, broadly convex; anterior clypeal margin broadly convex; occipital lobe rounded (southern Mexico to Costa Rica) Gnamptogenys simulans
 * Eye prominent, semispherical; anterior clypeal margin medially concave; occipital lobe subangular (eastern Ecuador to central Brazil) Gnamptogenys vriesi

7

 * Meso- and metatibial spurs absent (Colombia to southern Brazil) Gnamptogenys caelata
 * Meso- and metatibial spurs present

8

 * Clypeal lamella present; clypeus with a median tooth, postpetiolar tergite mostly with arched punctate-rugulae (southwestern Brazil) Gnamptogenys striolata
 * Clypeal lamella absent; clypeus with a median lobe; postpetiolar tergite with rough longitudinal costulae medianly (southeast Brazil) Gnamptogenys piei