Myrmoteras binghamii Forel, 1893

Bui, Viet Tuan, Eguchi, Katsuyuki & Yamane, Seiki, 2013, Revision of the ant genus Myrmoteras of the Indo-Chiese Peninsula (Hymenoptera: Formicidae: Formicinae), Zootaxa 3666 (4), pp. 544-558 : 549-550

Myrmoteras binghamii Forel, 1893

( Fig. 3 )

Myrmoteras binghamii Forel, 1893: 608 . Creighton, 1930: 186, fig. 2, pl. 11, fig. 2; Moffett, 1985: 24, figs. 12, 16, map 1.

Syntypes. 2 workers, Thaungyin Valley (Tenasserim), Burma [ Myanmar], May 1893 [MHGN] (examined).

Non-type material examined. Thailand: 8 workers, N. Thailand, Chiangmai Prov., Doi Suthep-Pui, 7 vi 2001, leg. S. Hasin; 1 worker, same loc., ca. 900 m alt., 7 vi 2001, leg. K. Eguchi; 1 worker, same loc., ca. 500–700 m alt., 22 vi 1999, leg. Sk. Yamane; 5 workers, Chiangmai Prov., Doi Chiang Dao, 9 vi 2001, leg. K. Eguchi, Eg01- TH-125.

Worker measurements and indices. TL 3.5–4.5, HL 1.04–1.19 (1.13), HW 1.04–1.15 (1.12), EL 0.67–0.75 (0.71), ML 1.27–1.50 (1.41), SL 1.19–1.46 (1.37), PrW 0.63–0.73 (0.70), HfL 1.31–1.54 (1.44), CI 97–100 (99), SI 115–127 (122). (5 non-type workers were measured.)

Worker description. Body brown; gaster dark-brown; mandible, legs pale yellow; mid- and hind coxae creamy to yellowish. Body with erect hairs; pubescence dense on dorsum of head, pronotum and second, third and fourth gastral segments. Clypeus slightly rugose; median portion of frons slightly and sparsely punctured; area around antennal insertion slightly rugoso-punctate; vertex of head (including occipital lobe) smooth; frontal sulcus faint, interrupted in the posterior half of frons, or sometimes reaching median ocellus; anterior clypeal margin concave; mandible with 9 teeth that reduce in size from the apical to basal teeth; two denticles present between first and second teeth; palp formula 6,4; orbital groove absent; scape a little shorter than funicular segments combined; funicular segments each longer than broad. Pronotum in lateral view flattened dorsally; anteriormost part of pronotum transversely rugose, and the remainder part of it faintly punctured; dorsal part of mesonotum rugosopunctate or rugose longitudinally; side of mesonotum with several longitudinal rugulae; mesopleuron, metapleuron and lateral face of propodeum smooth or weakly punctured; dorsum of propodeum weakly rugoso-punctate transversely; 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 or almost straight.

Remarks. This species has abundant appressed pubescence on gastral tergites. It is distinguished from the most closely related M. tomimasai by the weaker sculpture on the dorsum of head and pronotum, and creamy to yellowish mid- and hind coxae. Legs are yellowish and much paler than the mesosoma. (See also under M. concolor and M. tomimasai .)

Distribution. Myanmar (Forel, 1893), Thailand.

Figures

FIGURE 3. Myrmoteras binghamii Forel. Worker. A. Head, full-face view; B. Head and mesosoma, dorsal view; habitus, profile. Doi Chiang Dao, Chiang Mai Prov., N. Thailand, 9 / vi / 2001, K. Eguchi leg. (Eg 01 - TH- 125).