Cerapachyinae

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 Cerapachyinae based on the worker caste

The key includes Sphinctomyrmex , which is known from Thailand (Jaitrong Weeyawat, pers. comm.), Myanmar and India, but not yet from Vietnam.

1 Abdomen without a strong girdling constriction between segments III and IV (Fig. 1). Cerapachys (part: C. sexspinus group)

- Abdomen with a strong girdling constriction between segments III and IV (Fig. 2)................................. 2

2 Strong girdling constrictions present between abdominal segments III and IV, IV and V, V and VI (Fig. 76). Sphinctomyrmex

- Abdominal segments IV, V and VI without girdling constrictions separating them (Fig. 3)............................ 3

3 Frontal lobes relatively broadly separated from each other by median portion of clypeus (Fig. 77); antennal socket in full-face view partly concealed by frontal lobe; tibial spurs absent from middle legs (at most a setiform vestige may remain that cannot be distinguished by light microscopy from other setae at tibial apex)..................................... Simopone

- Frontal lobes very narrowly separated from each other by a longitudinal strip of median portion of clypeus (Fig. 4); antennal socket in full-face view almost completely exposed; one or two tibial spurs present on middle legs (Fig. 5)...... Cerapachys