Key to the Leptogenys of New Caledonia

This worker key is based on: [[Media:Ramage, T., Jouault, C. et al. 2019. Two new ant species from New Caledonia.pdf|Ramage, T., Jouault, C., Schmidt, A.R., Seyfullah, L.J. & Perrichot, V. 2019. Two new ant species (Formicidae: Dorylinae, Ponerinae) from New Caledonia. European Journal of Taxonomy 589: 1–14]], as modified from Wilson, 1958.

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 * Leptogenys
 * New Caledonia

1

 * Large species (HW > 1.2 mm) . . . . . 2


 * Small species (HW ≤ 1.2 mm) . . . . . 3

2

 * Mandibles exceptionally long, their length measured from insertion to tip exceeding the head width (Fig. 2A) . . . . . Leptogenys rouxi


 * Mandibles shorter, their length much less than the head width (Fig. 1B) . . . . . Leptogenys loarelae

3

 * Head entirely covered by coarse punctures (Fig. 2C) . . . . . Leptogenys punctata


 * Head entirely smooth and shining (Fig. 2B) . . . . . 4

4

 * Larger species, head width ≥ 0.9 mm; in dorsal view, posterior corners of petiolar node forming distinct angles of 45–50° (Fig. 3A) . . . . . Leptogenys acutangula


 * Smaller species, head width not exceeding 0.75 mm; in dorsal view, posterior corners of petiolar node thick and broadly rounded (Fig. 3B) . . . . . Leptogenys sagaris