Key to New World Leptogenys

Based on Lattke (2011).

1

 * Basal internal mandibular margin well separated from anterior clypeal margin with head in full-face view and mandibles closed, leaving distinct gap wider than mid-mandibular width (1A) . . . . . 2


 * Basal internal margin of each mandible shuts tightly against clypeus, if gap is present it is narrow and not wider than mid-mandibular width (1B) . . . . . 29

2

 * With head in full-face view hypostomal teeth distinctly visible, either wholly or partially (Figs. 69A, 75A) . . . . . 3


 * With head in full-face view hypostomal teeth not visible at all (Figs. 76A, 84A) . . . . . 14

3

 * Petiole with an apical tooth or crest that overhangs at least part of posterior margin of node in lateral view (Figs. 68B, 73B) . . . . . 4


 * Posterior margin of node without overhanging tooth or crest (Figs. 14B, 22B) #|. . . . . 9

4

 * Petiolar node with acutely pointed apical tooth in lateral view (Fig. 75B) . . . . . 5


 * Petiolar node with apical crest or blunt tooth (Fig. 74B) . . . . . 7

5

 * Head in full-face view broad (CI < 0.90) with lateral margins distinctly diverging anteriorly (Fig. 75A) . . . . . 6


 * Head narrower (CI > 0.90) with lateral margins sub-parallel or slightly diverging anteriorly (Fig. 69A) . . . . . Leptogenys bohlsi

6

 * Mandible gradually increasing in width towards apex . . . . . Leptogenys paraense


 * Mandible of equal width throughout length . . . . . Leptogenys unistimulosa

7

 * Mandible with parallel basal and external margins, not expanding apicad . . . . . Leptogenys pubiceps (in part)


 * Mandible distinctly expanding apicad . . . . . 8