Key to Aenictus phillippinensis group species

The following worker key is based on Jaitrong, W. & Yamane, S. (2012) Review of the Southeast Asian species of the Aenictus javanus and Aenictus philippinensis species groups (Hymenoptera, Formicidae, Aenictinae). ZooKeys 193: 49–78, doi: 10.3897/zookeys.193.2768.

1

 * Frons of head smooth and shiny; mandible extensively smooth and shiny, with scattered punctures, or striae confined to periphery . . . . . 2


 * Frons of head sculptured (superficially to very densely punctate); mandible almost entirely sculptured . . . . . 3

2
return to couplet #1
 * With head seen in profile occipital corner produced as a small lobe; sides of head partly superficially shagreened with smooth and shiny interspaces; larger species (HW 0.83–0.85 mm; TL 4.35–4.45 mm) . . . . . Aenictus rabori


 * With head seen in profile occipital corner without such a lobe; sides of head entirely smooth and shiny; smaller species (HW 0.78-0.80 mm; TL 4.00–4.10 mm) . . . . . Aenictus pangantihoni

3
return to couplet #1
 * Head entirely punctate, punctures fine and very dense; dorsal face of pronotum punctate (Borneo and Java) . . . . . Aenictus punctatus


 * Head superficially reticulate, slightly shiny; dorsal face of pronotum almost smooth and shiny (Philippines) . . . . . Aenictus philippinensis