Synopsis of Aenictus species groups and revision of the A. curra x and A. laeviceps groups in the eastern Oriental, Indo-Australian, and Australasian regions (Hymenoptera: Formicidae: Aenictinae) Author Jaitrong, Weeyawat Author Yamane, Seiki text Zootaxa 2011 3128 1 46 journal article 45801 10.5281/zenodo.207090 a51dd241-f273-4211-8dd3-e2fd556a8e43 1175-5326 207090 Aenictus piercei group Diagnosis. Head in full-face view with occipital corner convex, and posterior margin almost straight to shallowly and broadly concave; occipital margin lacking collar. Antenna 10-segmented; antennal scape short, reaching only midlength of head. Anterior clypeal margin roundly convex, lacking denticles. Mandible subtriangular; its masticatory margin with a large apical tooth, medium-sized subapical and basal teeth, and 2–6 denticles between them; basal margin of mandible with conspicuous denticles. Frontal carina short; parafrontal ridge absent. With mesosoma in profile promesonotum convex dorsally and sloping gradually to the propodeum; metapleural groove present or absent (mesonotum and propodeum fused); propodeal junction angular. Subpetiolar process well developed, triangular or subrectangular. Head and first gastral segment entirely smooth and shiny. Body yellowish brown to reddish brown; typhlatta spot absent. Remarks. This is a group of rather small species, measuring 1.80–3.20 mm in total body length. Wilson (1964) included A. piercei in the “ ceylonicus group”, which, he said, is a diverse group and defined arbitrarily to include heterogenous species. Also see under the A. ceylonicus group and A. javanus group. Distribution. Southernmost part of Japan , Taiwan , Myanmar , Thailand , Sumatra, and Philippines . Currently valid names for the Oriental, Indo-Australian, and Australasian forms. A. changmaianus Terayama et Kubota, 1993 ; A. lifuiae Terayama, 1984 ; A. minutulus Terayama et Yamane, 1989 ; A. peguensis Emery, 1894 ; A. piercei Wheeler et Chapman, 1930 .