Gnamptogenys, Roger, 1863

Marcineiro, Frederico S. R. & Lattke, John, 2020, A new species of the Gnamptogenys Mordax subgroup (Hymenoptera: Formicidae), with an Identification key to the species within the subgroup, Revista Brasileira de Entomologia (e 20190011) 64 (2), pp. 1-4 : 4

Key to mordax subgroup species identification ( Lattke et al., 2007 in part).

1. - Metacoxal dorsum unarmed, at most with a low tubercle or swelling; clypeal lamella laterally with blunt angles in dorsal view, medially anteriorly projecting and with a small median concavity… 2

-Metacoxal dorsum with a lobe or tooth; clypeal lamella different from above ............................................................................................... 3

2. - Mandible with lateral striae; petiole posterior margin with a central concavity in dorsal view .......................................G. stellae

-Mandible laterally smooth and shining; petiole posterior margin straight ...............................................................................G. interrupta

3. - Mandibular dorsum rugose on at least the basal one fourth of its length; pronotal-anepisternal suture broad, resembling a rugous low area ... G. rugimala n. sp.

-Mandibular dorsum mostly smooth and shining with sparse punctures; pronotal-anepisternal suture narrow, not resembling a rugous low area ....................................................................................... 4

4. - Metacoxal dorsum with a slender and parallel-sided lobe or tooth; HL> 1.12 mm; WL> 1.81 mm. … G. mordax

-Metacoxal dorsum with a low triangular lobe; HL<1.12 mm, WL<1.81 mm ................................................................................................ 5

5. - Dorsum of head striate; procoxa transversely striate; propodeal declivity inclined and relatively straight in lateral view; with weakly developed lateral lobes … G. boliviensis

-Cephalic dorsum costate; procoxa smooth and shining; propodeal declivity with a posterior concavity formed by well-developed anterolateral lobes............................................................. G. continua