Leptanillinae

Eguchi, Katsuyuki, Viet, Bui Tuan & Yamane, Seiki, 2014, Generic Synopsis of the Formicidae of Vietnam (Insecta: Hymenoptera), Part II — Cerapachyinae, Aenictinae, Dorylinae, Leptanillinae, Amblyoponinae, Ponerinae, Ectatomminae and Proceratiinae, Zootaxa 3860 (1), pp. 1-46 : 3

Key to Vietnamese genera of the subfamily Leptanillinae based on the worker caste

The key is modified from Borowiec et al. (2011) and Xu (2012), and contains two genera which have not yet been reported from Vietnam: Anomalomyrma , known from the Philippines and Borneo, and Furcotanilla , the single species F. furcomandibula (Xu et Zhang, 2002) known from Yunnan Province, China.

1 Mandible with 3–5 teeth (Fig. 6); metanotal groove vestigial to absent; bulla of metapleural gland rounded, located behind level of propodeal spiracle; median portion of clypeus never sharply marginate posteriorly and laterally (Fig. 6)... Leptanilla

- Mandible with more than 5 peg-like or saw-like teeth (Fig. 7); metanotal groove conspicuous; bulla of metapleural gland elongate and narrow, running longitudinally below propodeal spiracle; median portion of clypeus sharply marginate posteriorly and laterally (white arrow in Fig. 7).......................................................................... 2

2 Node of petiole without differentiated posterior face; mandible without peg-like teeth, instead with saw-like teeth along masticatory margin....................................................... Anomalomyrma (not yet found in Vietnam)

- Node of petiole with clearly differentiated posterior face (white arrow in Fig. 8); mandible with slender peg-like teeth, sometimes with an additional row of saw-like cuticular teeth along masticatory margin................................... 3

3 Node of postpetiole without differentiated posterior face; anterior margin of gaster in dorsal view deeply concave.............................................................................. Furcotanilla (not yet found in Vietnam)

- Node of postpetiole with clearly differentiated posterior face (gray arrow in Fig. 8); anterior margin of gaster in dorsal view almost straight................................................................................. Protanilla