Key to Aenictus wroughtonii group species

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The following worker key is based on Jaitrong, W., Yamane, S. & Wiwatwitaya, D. 2010. The Army Ant Aenictus wroughtonii and related species in the Oriental region, with descriptions of two new species. Japanese Journal of Systematic Entomology 16: 33-36. PDF

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1

2

return to couplet #1

Aenictus wroughtonii casent0907022 h 1 high.jpg
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  • Subpetiolar process weakly developed; its anteroventral corner angulate . . . . . 3

3

return to couplet #2

  • 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 . . . . . Aenictus sagei
Aenictus sagei casent0281958 h 1 high.jpg
Aenictus sagei casent0281958 p 1 high.jpg
  • Scape long; SI 130-140; body with sparse hairs; the longest pronotal hair approximately 0.15-0.18 mm; subpetiolar process with ventral outline slightly convex . . . . . Aenictus artipus
Aenictus artipus casent0281956 h 1 high.jpg
Aenictus artipus casent0281956 p 1 high.jpg

4

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  • Ventral outline of subpetiolar process convex, anteroventrally not angulate . . . . . 5
  • Ventral outline of subpetiolar process convex or almost straight; its anteroventral corner angulate . . . . . 6

5

return to couplet #4

  • Declivity of propodeum narrower, seen from back strongly tapering above; petiole slightly longer than high; body smaller with TL 2.6-2.7 mm; antenna longer with SI 122-135 . . . . . Aenictus camposi
Aenictus-camposiHolotypeH6..jpg
Aenictus-camposiHolotypeL4x.jpg
  • Declivity of propodeum broader, and more rounded above; petiole as long as high; body larger with TL 3.1-3.2 mm; antenna shorter with SI 114-118 . . . . . Aenictus biroi
Aenictus biroi casent0905989 h 1 high.jpg
Aenictus biroi casent0905989 p 1 high.jpg

6

return to couplet #4

  • Ventral outline of subpetiolar process strongly convex in anterior half; mesonotum partly and propodeum almost entirely densely sculptured; pronotum clearly demarcated from mesonotum by a shallow transverse groove . . . . . Aenictus vieti
  • Ventral outline of subpetiolar process almost straight; entire mesonotum and propodeum smooth and shiny, at most with superficial sculpture; pronotum only weakly demarcated from mesonotum . . . . . Aenictus stenocephalus