Key to Leptanilloides species

This worker key is based on: [[Media:Donoso 2006.pdf|Donoso, D.A., Vieira, J.M. & Wild, A.L. 2006. Three new species of Leptanilloides from Andean Ecuador. Zootaxa 1201: 47-62. PDF]]

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Leptanilloides

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 (Figure 6); 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
return to couplet #1
 * 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) . . . . . Leptanilloides nomada


 * 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
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 * 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 Brandão, Diniz et al. 1999) . . . . . Leptanilloides legionaria


 * 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
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 * Without hypostomal teeth . . . . . Leptanilloides mckennae


 * With hypostomal teeth (Figures 19–20) . . . . . Leptanilloides nubecula

5
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 * 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
return to couplet #5
 * Petiole, in lateral view, longer than postpetiole; head sculpture shallow, with 15 foveolae across face at midlength (Figure 7 in Brandão, Diniz et al. 1999) . . . . . Leptanilloides biconstricta


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

7
return to couplet #5
 * Genal teeth very small or reduced; mandibular teeth not developed, masticatory margin edentate (Figure 5) . . . . . Leptanilloides caracola


 * Genal teeth present (Figure 16 in Brandão, Diniz et al. 1999); mandibular teeth well developed (Figure 16 in Brandão, Diniz et al. 1999) . . . . . Leptanilloides improvisa