Brachyponera brevidorsa Xu 1994

Brachyponera brevidorsa Xu, 1994 Fig. 21 A-C Brachyponera brevidorsa Xu, 1994 b: 183, figs 5, 6 (w.). Type locality: China (Yunnan). Type material. Holotype (worker). China: • Yunnan, Baoshan City, 1800 m, 11. x. 1991, Zhenghui Xu leg (SWFU), No. A 91-1022. Paratypes (workers). China: • 11 workers; same collection data as for holotype. Other material examined. 5 workers; China, • Yunnan, Lvchun City, 1515 m, 24 Jun. 2023, Chao Chen leg., No. KIZ 20231057.1 - KIZ 20231057.5. Measurements and indices. Worker (Fig. 21 A – C): HL 0.84, HLL 0.77, HLA 0.11, HW 0.80, ML 0.46, CML 0.09, CI 95, SL 0.73, SI 92, ED 0.11, PrL 0.48, PrH 0.42, PrW 0.58, WL 1.16, TL 3.8, PL 0.26, PH 0.59, DPW 0.42, LPI 229, PDPI 165. Diagnosis. The species can be separated from other Chinese members of the genus based on the combination of the following characters: smaller species, <4 mm in total body length; antenna scape short, slightly exceeds posterolateral corner; clypeal median lobe relatively short; frontal carina relatively short, reaching level posterior margin of eye; in lateral view, pronotum relatively flat; propodeum low, dorsum slightly raised, obviously shorter than declivity, transition between declivity and dorsum is rounded; body entirely black. Brief description. In full-face view, head longer than broad, roughly trapezoidal, posterolateral corners narrowly rounded. Mandible triangular with nine teeth. Antennae 12 - segmented, scape slightly exceeds posterolateral corner, flagellar segments gradually become thicker and rod-shaped towards the end. Eye medium in size and located in front of lateral margin of head. In lateral view, promesonotal suture depressed, metanotal groove deeply impressed. Propodeum convex, mesonotum prominently elevated. Propodeum low, dorsum slightly raised, obviously shorter than declivity, transition between declivity and dorsum is rounded. Petiolar node nearly trapezoidal; subpetiolar process wedge-shaped. In dorsal view, propodeum anterior part narrower than posterior part. Petiolar node crescent-shaped. Head densely punctate. Pronotum with densely punctured. Propodeum lateral margin shiny; dorsum of mesonotum and propodeum shiny. dorsal surface of body with sparsely erect or suberect hairs and densely sub-decumbent hairs. Body color black, mandible, flagellum, legs, and end of gaster yellowish brown.