Revision of the ant genus Myrmoteras of the Indo-Chiese Peninsula (Hymenoptera: Formicidae: Formicinae) Author Bui, Viet Tuan Author Eguchi, Katsuyuki Author Yamane, Seiki text Zootaxa 2013 3666 4 544 558 journal article 43478 10.11646/zootaxa.3666.4.8 b28216ff-9283-4242-94db-e2c655911e08 1175-5326 217734 FBBCDFBA-F60A-40F0-AAB7-7F20D97EFFE2 Myrmoteras opalinum sp. nov. ( Fig. 7 ) Type material. Holotype worker from southern Thailand , Surat Thani Province, Tai Rom Yen NP., nest in soil, 12 x 2011 , leg. Sk. Yamane (TH11-SKY-045) [THNMH]. Paratypes : 9 workers from the same colony as holotype ; 7 workers from the same locality, 12 x 2011 , leg. Sk. Yamane (TH11-SKY-50) [ACEG, MHNG, THNHM, SKYC, VNMN]. FIGURE 6. Myrmoteras namphuong sp. nov. Paratype worker. A. Head, full-face view; B. Head and mesosoma, dorsal view; habitus, profile. Ban Khoang (A), Sa Pa, Lao Kai, N Vietnam, 27/iv/2002, K. Eguchi leg. (Eg02VN123). Worker measurements and indices. TL 3.5– 4.0 , HL 1.04– 1.10 (1.06), HW 1.02–1.10 [ 1.08 ] (1.06), EL 0.65– 0.69 [ 0.67 ] (0.67), ML 1.31– 1.37 (1.34), SL 1.21–1.30 [ 1.29 ] (1.27), PrW 0.63– 0.67 (0.67), HfL 1.31– 1.40 (1.37), CI 96–102 [ 98 ] (99), SI 118– 120 (119). ( Holotype and 5 paratype and non-type workers were measured.) Worker description. Head and mesosoma brown, slightly with reddish tinge; petiole and gaster dark brown; mid- and hind coxae and femora whitish yellow; femora of all legs distinctly paler than tibiae. Body with erect hairs; dorsum of head and pronotum and first gastral tergite with pubescence; lateral face of gastral tergite I and II with sparse pubescence (often abraded away). Clypeus and lower frons densely rugoso-punctate; area around antennal insertion finely rugoso-striate. Anteriormost part of pronotum with faint, transverse rugoso-punctatation, and remainder portion smooth or faintly and sparsely punctate; dorsum of mesonotum longitudinally or irregularly rugose; lateral face of mesonotum with several irregular rugae; mesopleuron, metapleuron and lateral face of propodeum smooth or faintly and sparsely punctured; dorsum of propodeum with faint, transverse rugosopunctation. Frontal sulcus faint but reaching median ocellus (sometimes interrupted); anterior clypeal margin concave; mandible with 8 teeth that reduce in size from apical to basal teeth; two denticles present between first and second teeth; palp formula 6,4; orbital groove absent; scape distinctly shorter than funicular segments combined; funicular segments each longer than broad. Pronotum in lateral view with flat dorsal outline; mesonotum as long as high; propodeum in lateral view roundly convex posterodorsally. Petiolar node in lateral view with vertical anterior face and steep posterior slope; ventral outline of petiole beneath the node slightly sinuate. Etymology. The specific name refers to the milk-white colour of the coxae and femora of the mid- and hind legs. Remarks. This is a relatively small species, easily separated from other Indo-Chinese congeners by the milkwhite colour of the coxae and femora of the mid- and hind legs, and the femora of all legs that are distinctly paler than the tibiae. The two nests were found in soil, in a lowland forest in southern Thailand . Distribution. Southern Thailand .