Key to Aenictus laeviceps group species

The following worker key is based on Jaitrong, W. & Yamane, S. 2011. Synopsis of Aenictus species groups and revision of the A. currax and A. laeviceps groups in the eastern Oriental, Indo-Australian, and Australasian regions (Hymenoptera: Formicidae: Aenictinae). Zootaxa, 3128, 1–46. [[Media:Jaitrong_&_Yamane_2011.pdf|PDF]]

Key to Aenictus species groups

1

 * Pronotum extensively sculptured, the sculpture may be very superficial or represented by dense punctation . . . . . 2


 * Pronotum largely smooth and shiny, only anteriormost portion finely punctate . . . . . 3

2
return to couplet #1
 * Entire pronotum finely and densely recticulate and opaque; larger species (HW 0.90–0.95) (Vietnam, Laos, and Thailand) . . . . . Aenictus binghami


 * Pronotum very superficially reticulate and somewhat shiny (dorsum almost smooth); smaller species (HW 0.63–0.70) (Thailand) . . . . . Aenictus siamensis

3
return to couplet #1
 * Vertex with only two long standing hairs . . . . . 4


 * Vertex with some shorter standing hairs in addition to two long hairs . . . . . 7

4
return to couplet #3
 * Promesonotum with more than 4 standing hairs mixed with short hairs over the surface; dorsum of propodeum with several short hairs (Thailand, Borneo) . . . . . Aenictus sonchaengi


 * Promesonotum with 0–4 standing hairs; dorsum of propodeum without hairs . . . . . 5

5
return to couplet #4
 * Propodeum entirely or partly smooth, or very superficially sculptured, and shiny (Java) . . . . . Aenictus breviceps


 * Propodeum entirely sculptured . . . . . 6

6
return to couplet #5
 * Petiole shorter than high or almost as long as high (Brunei, Sarawak and Sabah) . . . . . Aenictus rotundicollis


 * Petiole distinctly longer than high (Peninsular Malaysia, Thailand, Sarawak, Sabah, Brunei, Sumatra, Java, and Philippines) . . . . . Aenictus laeviceps

7
return to couplet #3
 * Propodeum entirely sculptured, or rarely with a small smooth area near spiracle (Sabah) . . . . . Aenictus montivagus


 * Propodeum extensively smooth and shiny; at most the dorsum superficially sculptured and rather shiny . . . . . 8

8
return to couplet #7
 * Mesopleuron in at least lower portion smooth and shiny . . . . . 9


 * Mesopleuron entirely densely sculptured . . . . . 11

9
return to couplet #8
 * Subpetiolar process low, without anterior angle, ventrally with a spiniform appendage directed downward and backward (Malay Peninsula, Borneo) . . . . . Aenictus fulvus


 * Subpetiolar process low and anteriorly angulate; the ventral appendage not spiniform . . . . . 10

10
return to couplet #9
 * Larger species (HW 0.80–0.85 mm); ventral appendage of subpetiolar process high, subtriangular; scape index: 100–106 (Philippines) . . . . . Aenictus alticola


 * Smaller species (HW 0.78 mm); ventral appendage of subpetiolar process rudimentary, with highest point at anterior portion; scape index: 94–97 (Philippines) . . . . . Aenictus luzoni

11
return to couplet #8
 * Femora entirely smooth and shiny (Sumatra) . . . . . Aenictus bodongjaya


 * Femora partly shagreened . . . . . 12

12
return to couplet #11
 * Petiole shorter than high and slightly smaller than post petiole (Sulawesi) . . . . . Aenictus brevinodus


 * Petiole distinctly longer than high and slightly larger than postpetiole (Vietnam, Myanmar, Laos, Cambodia, Thailand, Bali, Lombok) . . . . . Aenictus hodgsoni