Leptanilloides

Donoso, D. A., Vieira, J. M. & Wild, A. L., 2006, Three new species of Leptanilloides Mann from Andean Ecuador (Formicidae: Leptanilloidinae)., Zootaxa 1201, pp. 47-62 : 59-60

Key to species of Leptanilloides based on the worker caste

1 Postpetiole in profile much shallower dorsoventrally than adjoining fourth abdominal segment (Figures 2, 4); postpetiolar spiracle shifted posteriad on anteromedian side of tergite (Figures 9, 13); genal teeth absent or very reduced in size (Figure 3), body size relatively large [HL 0.68-0.70] ..................................................................................... 2

- Postpetiole in profile nearly as deep dorsoventrally as fourth abdominal segment (Figure6); postpetiolar spiracle situated forward on the tergite; genal teeth usually present and large (except in L. caracola ), body size relatively small [HL 0.40-0.50] ............ 5

2 Head subquadrate [CI 85-88]; lateral margins nearly straight and parallel (Figure 1); propodeal declivity short and straight, propodeum with dorsal and posterior faces clearly differentiated (Figure 2) ................................................... L. nomada (Ecuador)

- Head subrectangular [CI 75-80]; lateral margins rounded (Figure 3); propodeal declivity usually rounded without clear distinction between dorsal and posterior face (Figure 4) .................................................................................................................................. 3

3 Lateral margins of the head rounded; posterior margin of the head slightly concave; head sculpture fine, at most 10-12 shallow foveolae across face at midlength (Figure 5 in Brandao, Diniz et al. 1999) ................................................. L. legionaria (Colombia)

- Lateral margins of the head slightly rounded; posterior margin of the head deeply concave; head sculpture more coarse, with at least 15 foveolae across face at midlength. 4

4 Without hypostomal teeth ....................................................... L. mckennae (Costa Rica)

- With hypostomal teeth (Figures 19-20) ...................................... L. nubecula (Ecuador)

5 Flange over metapleural gland opening rounded posteriorly; head sculpture coarse, about 20 deep foveolae across face at midlength .......................................................... 7

- Flange over the metapleural gland opening sharply pointed posteriorly; head sculpture variable .......................................................................................................................... 6

6 Petiole, in lateral view, longer than postpetiole; head sculpture shallow, with 15 foveolae across face at midlength (Figure 7 in Brandao, Diniz et al. 1999) ............................ .................................................................................................. L. biconstricta (Bolivia)

- Petiole, in lateral view, as long as postpetiole; head sculpture deeper, with 25 foveolae across face at midlength (Figure 1 in Brandao, Diniz et al. 1999) ................................. .............................................................................................. L. sculpturata (Colombia)

7 Genal teeth very small or reduced; mandibular teeth not developed, masticatory margin edentate (Figure 5) ................................................................ L. caracola (Ecuador)

- Genal teeth present (Figure 16 in Brandao, Diniz et al. 1999); mandibular teeth well developed (Figure 16 in Brandao, Diniz et al. 1999) ................ L. improvisa (Ecuador)