Stictoponera dentihumera

This species, known from a single nest, was found nesting in dead wood of a branch on the ground in a subtropical evergreen broad-leaved forest, at the altitude of 925 m.

Identification
The workers of G. dentihumera are similar to workers of G. panda, but G. dentihumera can be distinguished from the latter by propodeum with short triangular denticle and triangular subpetiolar process. The workers of G. dentihumera also resemble G. sinensis, but differ from the latter by the occipital lamella of head shaped as a blunt triangular denticle, and the pronotal humeral denticle of the workers of G. dentihumera is short, pointing laterally, unsurpassing the anterior margin of pronotum.

Distribution based on Regional Taxon Lists
Palaearctic Region: China.

Biology
This species was found nesting in deadwood of a branch on the ground in a subtropical evergreen broad-leaved forest, at the altitude of 925 m. All ants came from the same nest.

Nomenclature

 *  dentihumera. Gnamptogenys dentihumera Chen, Lattke & Zhou, 2017: 95, figs. 1–10, Map 1 (w.q.) CHINA.

Description
In full-face view head rectangular, longer than broad; posterior margin almost straight, posterior corner bluntly angular, lateral margin weakly convex. Mandible triangular, masticatory margin crenulate. Anterior margin of clypeus with convex to bluntly pointed median lobe. Antennal scape just slightly surpassing posterior corner of head, flagellar segments longer than broad. Eye small, with 10 ommatidia along maximum diameter, situated on midpoint of cephalic lateral margin. In lateral view occipital lamella of head forming a blunt triangular denticle. Dorsum of mesosoma strongly convex, promesonotal suture slightly impressed. Propodeum with short triangular denticle; propodeal declivity weakly concave close to tooth then relatively straight. Petiole roughly trapezoidal, about 2.1 times higher than long, dorsal and anterior margins weakly convex, posterior margin straight, subpetiolar process broadly triangular. Sting extruding. In dorsal view anterolateral margin of pronotum with strong constriction, forming pointed denticle on humeral area. Metanotal groove ambiguously evident, evidenced by a change in sculpturing. Petiolar anterior corner rounded, lateral margin weakly convex in dorsal view. Mandibular dorsum and clypeus with longitudinal fine striae; cephalic dorsum mostly longitudinally rugulose-foveolate; side of pronotum, propodeum, petiole and mesonotum with longitudinal striae; propleuron irregularly rugulose; meso- and metapleuron longitudinally striate; fourth abdominal tergite finely irregularly rugulose, sternite rugulae denser than on tergite. Propodeal declivity transversely striate. Head, mesosoma, petiole, and gaster with abundant suberect hairs and sparse decumbent pubescence. Scape and tibiae with sparse sub-decumbent hairs and dense decumbent pubescence. Body color black; mandible, antenna and leg reddish-brown.