Leptomyrmex species

Smith, Derek J. & Shattuck, Steve, 2009, Six new, unusually small ants of the genus Leptomyrmex (Hymenoptera: Formicidae), Zootaxa 2142 (1), pp. 57-68 : 58-59

Key to the workers of micro- Leptomyrmex species based on workers

1. Scapes short (scape length <1.1 mm, SI <150, Fig. 20 ); head short (CI> 82, Fig. 19 ); hind tibial spurs with barbules approximately as long as spur diameter ( Fig. 24 ) ........................................................................... ramorniensis

-. Scapes long (scape length> 1.0 mm, SI> 170, Fig. 20 ); head long (CI <81, Fig. 19 ); hind tibial spurs with barbules approximately half as long as spur diameter ( Fig. 23 ) ................................................................................................. 2

2. Pubescence long, dense and decumbent ............................................................................................................ pilosus

-. Pubescence short, sparse and adpressed ..................................................................................................................... 3

3. Petiolar node flat dorsally in anterior view ................................................................................................... aitchisoni

-. Petiolar node convex dorsally in anterior view ........................................................................................................... 4

4. Antennal scapes relatively long (SI> 220, Fig. 20 ), extending beyond vertex by more than half their length ............. ................................................................................................................................................................ dolichoscapus

-. Antennal scapes relatively short (SI <220, Fig. 20 ), extending beyond vertex by about half their length ................ 5

5. Anterior mesonotum raised into a bump ( Fig. 5 ), dorsum of node highly and uniformly convex in anterior view....... .......................................................................................................................................................................... burwelli

-. Anterior mesonotum without a raised bump ( Fig. 11 ), dorsum of node weakly convex in anterior view, the sides more strongly curved than the central region .................................................................................................... garretti

Figures

FIGURES 19–20. Fig. 19, graph of head length versus head width. Fig. 20, graph of scape length versus head width.

FIGURES 23–24. Fig. 23, hind tibial spur of L. burwelli. Fig. 24, hind tibial spur of L. ramorniensis.

FIGURES 1–6. Leptomyrmex aitchisoni sp. n. worker. Fig. 1, front of head; Fig. 2, lateral view of body; Fig. 3, dorsal view of body. Leptomyrmex burwelli sp. n. paratype worker. Fig. 4, front of head; Fig. 5, lateral view of body; Fig. 6, dorsal view of body.

FIGURES 7–12. Leptomyrmex dolichoscapus sp. n. holotype worker. Fig. 7, front of head; Fig. 8, lateral view of body; Fig. 9, dorsal view of body. Leptomyrmex garretti sp. n. holotype worker. Fig. 10, front of head; Fig. 11, lateral view of body; Fig. 12, dorsal view of body.