Ponerinae

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 : 4

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

The key includes Bothroponera , Pseudoponera , Emeryopone and Myopias , which have wide distributions in the Oriental region, but are not yet recorded from Vietnam.

1 Mandible long and straight, inserted in middle of anterior margin of head (Fig. 23); girdling constriction between abdominal segments III and IV very weak (Fig. 24)................................................................... 2

- Mandible triangular or rarely elongate, but always inserted at anterolateral corner of head (Figs. 25, 26, 78, 79); girdling constriction between abdominal segments III and IV usually pronounced (Fig. 27).................................... 3

2 A pair of dark lines (dl in Fig. 28) present on posterior face of head; the lines meet together at or near the dorsalmost part of preoccipital carina (oc); vertex with a median longitudinal carina (mlc) which meet preoccipital carina...... Odontomachus

- A pair of dark lines absent on posterior face of head inside preoccipital carina (oc in Fig. 29); vertex without a median longitudinal carina.................................................................................. Anochetus

3 Frontal lobes broadly separated by posteromedian portion of clypeus (Fig. 30); metatibia 2 pectinate spurs spurs (Fig. 31).... Platythyrea

- Frontal lobes narrowly separated by posteromedian portion of clypeus or otherwise closely approximated (Fig. 32); metatibia with only 1 simple or pectinate spur, or with a large pectinate spur and a much smaller simple spur (Figs. 33, 34)......... 4

4 Mandible with an elongate and linear blade which has two rows of many small teeth (Fig. 25); ventral part of base of each mandibular blade forming a large triangular flange................................................ Harpegnathos

- Mandible variable in shape but never with blade as above (Figs. 26, 78, 79)...................................... 5

5 Anterior clypeal margin armed with a series of distinct teeth (Fig. 35); each humerus (dorsolateral part of pronotum) forming a distinct process (Fig. 36)..................................................................... Odontoponera

- Anterior clypeal margin without a series of distinct teeth (Fig. 37), but often with a median emargination or tooth/process; each humerus (dorsolateral part of pronotum) never forming a distinct process (Fig. 38)................................. 6

6 Posterodorsal margin of petiolar node armed with a pair of acute spines (Fig. 39); a conspicuous excavation present above mesopleuron (Fig. 40) (in ergatoid queen the excavation filled with a substance called gemma)................ Diacamma

- Posterodorsal margin of petiolar node usually unarmed (Fig. 41), or sometimes with three or more dents or rarely with a single median prominence, but never armed with a pair of acute spines; a conspicuous excavation absent above mesopleuron (Fig. 42)................................................................................................ 7

7 Inner margin of pretarsal claws of hind leg armed with 1 to many teeth (Fig. 43); median portion of clypeus well produced anteriad (Fig. 44)............................................................................. Leptogenys

- Inner margin of pretarsal claws of hind leg without teeth (Fig. 45); median portion of clypeus usually weakly produced (Fig. 46), but sometimes forming a conspicuous projection (Fig. 78)................................................. 8

8 Dorsal (outer) surface of mesotibia with peg-like or spiniform setae among background pilosity (Fig. 47)............... 9

- Dorsal surface of mesotibia without peg-like or spiniform setae (Fig. 48) (dorsal surface of mesotibia sometimes with a few stout setae near tarsus but not extending along length of tibia, and/or sometimes with relatively long and thick standing setae scattered among background pilosity).................................................................... 10

9 Basal portion of mandible with a distinct circular fovea or elongate depression dorsolaterally (Fig. 49)......... Cryptopone

- Basal portion of mandible without a circular fovea or elongate depression dorsolaterally (Fig. 50)........... Centromyrmex 10 Apex of metatibia ventrally with a large pectinate spur, but without a smaller, simple spur in front of the pectinate spur (Fig.