Key to Aenictus wroughtonii group species

The following worker key is based on [[Media:Jaitrong, W., Ruangsittichai, J. 2018. Two new species of the Aenictus wroughtonii species group from Thailand.pdf|Jaitrong, W., Ruangsittichai, J. 2018. Two new species of the Aenictus wroughtonii species group (Hymenoptera, Formicidae, Dorylinae) from Thailand. ZooKeys, 775: 103-115 (doi: 10.3897/zookeys.775.26893).]]

Key to Asian species of the Aenictus wroughtonii species group based on worker caste.

You might be interested in
 * Aenictus species groups (diagnoses)
 * Key to Aenictus species groups
 * The Aenictus genus page.

1

 * Antennal scapes short, when laid back only attaining mid-length or two-thirds of the head length . . . . . 2


 * Antennal scape long, when laid back attaining or extending beyond the pos¬terolateral corner of the head . . . . . 4

2
return to couplet #1
 * HW 0.31–0.33 mm; antennal scape attaining only mid-length of the head; petiole excluding subpetiolar process shorter than high (Thailand) . . . . . Aenictus samungi


 * HW > 0.37 mm; antennal scape attaining two-thirds of the head length; petiole excluding subpetiolar process longer than high . . . . . 3

3
return to couplet #2
 * Propodeal junction rounded; lateral faces of the petiole and postpetiole su¬perficially reticulate; subpetiolar process present, its anteroventral corner an¬gulate; postpetiole slightly longer than the petiole (Saudi Arabia) . . . . . Aenictus arabicus


 * Propodeal junction angulate; lateral faces of the petiole and postpetiole en¬tirely smooth and shiny; subpetiolar process convex dorsally, anteroventrally not angulate; postpetiole slightly shorter than the petiole (Thailand) . . . . . Aenictus nuchiti

4
return to couplet #1
 * Propodeal junction rounded . . . . . 5


 * Propodeal junction angulate . . . . . 9

5
return to couplet #4
 * Subpetiolar process almost absent, anteroventrally not angulate (India) . . . . . Aenictus wroughtonii


 * Subpetiolar process weakly developed; its anteroventral corner angulate . . . . . 6

6
return to couplet #5
 * Entire pronotum and petiole sculptured (punctate or reticulate) (China) . . . . . Aenictus gutianshanensis


 * Pronotum and petiole largely smooth and shiny . . . . . 7

7
return to couplet #6
 * HW 1.00–1.04 mm (Aktaç et al. 2004, measurements of syntypes); posterior margin of head concave (Greece, Iran, Israel, Turkey) . . . . . Aenictus rhodiensis


 * HW < 0.60 mm; posterior margin of head almost straight or convex . . . . . 8

8
return to couplet #7
 * Scape short; SI 100 or less; body hairy; the longest pronotal hair 0.23–0.25 mm; subpetiolar process very low, with ventral outline almost straight (India, Nepal, Afghanistan) . . . . . Aenictus sagei


 * Scape long; SI 130–140; body with sparse hairs; the longest pronotal hair ap¬proximately 0.15–0.18 mm; subpetiolar process with ventral outline slightly convex (China, Vietnam, Thailand) . . . . . Aenictus artipus

9
return to couplet #4
 * Ventral outline of subpetiolar process convex, anteroventrally not angulate . . . . . 10


 * Ventral outline of subpetiolar process convex or almost straight; its anter¬oventral corner angulate . . . . . 11

10
return to couplet #9
 * Declivity of propodeum narrower, seen from back strongly tapering above; petiole longer than high (PI 84–86); body smaller with TL 2.6–2.7 mm; an¬tenna longer with SI 122–135 (Thailand, Indonesia, Malaysia, Philippines) . . . . . Aenictus camposi


 * Declivity of propodeum broader and more rounded above; petiole almost as long as high (PI 95–100); body larger with TL 3.1–3.2 mm; antenna shorter with SI 114–118 (Sri Lanka) . . . . . Aenictus biroi

11
return to couplet #9
 * Ventral outline of subpetiolar process strongly convex in anterior half; mes¬onotum partly and propodeum almost entirely densely sculptured; pronotum clearly demarcated from mesonotum by a shallow transverse groove (Taiwan, Vietnam and Thailand) . . . . . Aenictus vieti


 * Ventral outline of subpetiolar process almost straight; entire mesonotum and propodeum smooth and shiny, with at most superficial sculpture; pronotum only weakly demarcated from mesonotum (Thailand) . . . . . Aenictus stenocephalus