Key to Aenictus species groups

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search

The following key to Aenictus species groups has been modified from Jaitrong & Yamane (2011[1]).

You might also be interested in

1

2

  • Anterior clypeal margin with denticles => 3
  • Anterior clypeal margin lacking denticles => 5

3

  • Typhlatta spot present; body black, dark brown to reddish brown => A. laeviceps group
  • Typhlatta spot absent; body yellow to yellowish brown => 4

4

  • Mandible subtriangular; masticatory margin with 3 teeth including large apical tooth => A. javanus group
  • Mandible triangular; masticatory margin with 9–12 teeth including large apical tooth => A. wroughtonii group

5

  • Anterior clypeal margin concave or almost straight; mandible linear; with mandibles closed a gap present between mandibles and anterior clypeal margin => A. ceylonicus group
  • Anterior clypeal margin convex; mandible triangular to subtriangular; with mandibles closed a gap absent between mandibles and anterior clypeal margin => 6

6

  • Typhlatta spot present; head entirely smooth and shiny => 7
  • Typhlatta spot absent; head sculptured or smooth and shiny => 9

7

  • Head in full-face view with occipital corner convex, with a distinct protuberance on occipital corner, which gives the head a unique “horned” appearance => A. currax group
  • Head in full-face view with occipital corner rounded, without lateral protuberance => 8

8

  • Subpetiolar process well developed, subtriangular with its apex directed downward; worker caste completely monomorphic; propodeum normal => A. leptotyphlatta group
  • Subpetiolar process weakly developed or almost absent; worker caste polymorphic; propodeum inflated in major and intermediate workers => A. inflatus group

9

  • Parafrontal ridge essentially absent; head entirely smooth and shiny => A. minutulus group
  • Parafrontal ridge well developed; head entirely sculptured or rarely smooth => 10

10

  • First gastral segment micropunctate; subpetiolar process well developed, with posteroventral corner produced posteriad => A. hottai group
  • First gastral segment clearly smooth and shiny or weakly shagreened with smooth and shiny interspaces; subpetiolar process weakly developed or almost absent => 11

11

  • Mesonotum demarcated from mesopleuron by a conspicuous ridge; metanotal groove relatively deep and distinct => A. philippinensis group
  • Mesonotum not visibly demarcated from mesopleuron; metanotal groove indistinct => A. pachycerus group

References

  1. 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.
  • Jaitrong, W. & Hashimoto, Y. 2012. Revision of the Aenictus minutulus species group (Hymenoptera Formicidae Aenictinae) from Southeast Asia. Zootaxa 3426, 29-44.