Key to Leptanillinae Genera

The following key to genera of the Leptanillinae based on the worker caste is modified from Griebenow et al. (2022).

1

 * Abdominal segment III not constricted posteriorly (Fig. 13a); occiput visible in full-face view (Yamada et al. 2020, fig. 1a) Opamyrma


 * Abdominal segment III constricted posteriorly, forming postpetiole (Fig. 13b, c); occiput not visible in full-face view

2

 * Posterior face of dorsal petiolar node not distinct (Fig. 13c); abdominal segments II-III with tergotergal and sternosternal fusion partial to complete Anomalomyrma
 * Posterior face of dorsal petiolar node distinct (Fig. 13b); abdominal segments II-III without tergotergal or sternosternal fusion

3

 * Mandible with peg-like chaetae on medial face (Fig. 3a); mandible with regularly spaced dorsomedial serration; mandible lacking subapical teeth (Fig. 3a, b) Protanilla
 * Mandible without peg-like chaetae on medial face; serration present or absent from dorsomedial margin (Fig. 3c, d), if present then irregularly spaced; mandible with ≥1 subapical tooth

4

 * Frontoclypeal process present or absent (Fig. 14a), if present apex entire (Fig. 14b) or emarginate, if emarginate then apicolateral margins angular (Fig. 14c); SI < 100; PI > 31 Leptanilla
 * Frontoclypeal process present, apex emarginate, apicolateral margins lobate (Fig. 14d); SI ≥ 100; PI ≤ 31 Yavnella