Leptogenys pangui

Nothing is known about the biology of .

Identification
This new species is close to Leptogenys chinensis, but with body much larger; scape of antenna surpassed occipital corner by 1/2 of its length; petiolar node triangular, obviously longer than high, without distinct anterior face. (Xu 2000)

Distribution based on Regional Taxon Lists
Oriental Region: Vietnam. Palaearctic Region: China.

Castes
Known only from the worker caste.

Nomenclature

 *  pangui. Leptogenys pangui Xu, 2000a: 120, figs. 13-16 (w.) CHINA.

Worker
Holotype worker: TL 13.5, HL 2.50, HW 1.63, CI 65, SL 3.45, SI 213, PW 1.40, AL 4.50, ED 0.70, ML 1.20, PL 1.57, PH 1.23, DPW 0.67, LPI 79, DPI 43.

Body large. Head distinctly longer than broad, obviously narrowed backward. Occipital margin nearly straight, shallowly depressed. Occipital carina distinct. Occipital corners bluntly angled. Lateral sides weakly convex. Mandibles slender, inner margin without tooth, masticatory margin with 1 apical tooth and 1 small basal tooth. Clypeus with sharp longitudinal central carina, median lobe truncate at most apex. Scape of antenna surpassed occipital corner by 1/2 of its length. Ratio of length of the basal 3 segments of flagellum expressed as, segment 1 : segment 2 : segment 3 = 4 : 10 : 9. Eyes large. In profile view dorsum of alitrunk deeply depressed at metanotal groove. Pronotum and mesonotum evenly convex. Promesonotal suture distinct. Dorsum of propodeum long and straight for most of its length, about 3.5 times as long as declivity. Petiolar node strongly and laterally compressed, in profile view longer than high, nearly triangular, without distinct anterior face, dorsal face weakly convex, posterior face straight; in dorsal view about 2 times as long as broad, narrowed forward. Subpetiolar process small, triangular. Constriction between the two basal gastral segments distinct. Mandibles with dense micropunctures and sparse large punctures. Clypeus finely and longitudinally striate. Head, alitrunk, petiole and gaster smooth and shining, with quite sparse piliferous punctures. Head and body with abundant erect long hairs, suberect short hairs and very sparse decumbent pubescence. Vertex with dense pubescence. Scapes of antennae with sparse suberect long hairs, subdecumbent short hairs and dense decumbent pubescence. Femora and tibiae with decumbent hairs. Body black, with blue metallic luster. Mandibles, flagella of antennae, legs and posterior margins of each gastral segments blackish brown. Pilosity brownish yellow.

Paratype worker: TL 12.8, HL 2.45, HW 1.60, CI 65, SL 3.30, SI 206, PW 1.45, AL 4.30, ED 0.70, ML 1.15, PL 1.53, PH 1.20, DPW 0.77, LPI 78, DPI 50 (1 measured). As holotype, but hairs on dorsum of head and body very sparse.

Type Material
Holotype: Worker, No. A98-995, 650 m, Menglun, Mengla County, Yunnan Province, Sep. 15 1998, XU Zheng-hui. Paratype: 1 worker, No. A96-756, 640 m, locality as holotype, Mar. 4, 1996, XU Zheng-hui.