Key to Gnamptogenys minuta-group species

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

1

  • Propodeum with a pair of denticles => 7
  • Propodeum continuous, denticles absent => 2

2

return to couplet #1

  • Integument mostly opaque, sculpturing predominantly granulose with variable degrees of areolae/foveolae => 3
  • Integument mostly shiny or silky, sculpturing can be finely striolate or smooth with variable degrees of areolae/foveolae => 5

3

return to couplet #2

  • Mandible falcate, masticatory margin edentate and concave (north-central Venezuela) => Gnamptogenys fieldi
  • Mandible triangular, masticatory margin fairly straight and denticulate or crenulate => 4

4

return to couplet #3

  • 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

return to couplet #2

6

return to couplet #5

  • 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

return to couplet #1

  • Meso- and metatibial spurs absent (Colombia to southern Brazil) => Gnamptogenys caelata
  • Meso- and metatibial spurs present => 8

8

return to couplet #7

  • 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

References