Leptogenys lucidula

Identification
A member of the Leptogenys crassicornis species group.

Distribution based on Regional Taxon Lists
Oriental Region: Cambodia, India, Myanmar, Vietnam. Palaearctic Region: China.

Nomenclature

 *  lucidula. Leptogenys lucidula Emery, 1895k: 462 (w.) MYANMAR. Senior synonym of huangdii: Xu, Z.-H., He, Q.-J. 2015: 143. See also: Bingham, 1903: 66.
 * huangdii. Leptogenys huangdii Xu, 2000a: 119, figs. 5-8 (w.) CHINA. Junior synonym of lucidula: Xu, Z.-H., He, Q.-J. 2015: 143.

Description
The following is the original description of Leptogenys huangdii, a junior synonym of this taxon:

Holotype worker: TL 5.2, HL 1.27, HW 1.07, CI 84, SL 1.00, SI 94, PW 0.73, AL 1.93, ED 0.17, ML 0.63, PL 0.40, PH 0.60, DPW 0.43, LPI 160, DPI 108.

Head nearly square. Occipital margin almost straight, shallowly depressed. Occipital carina distinct. Occipital corners blunt but distinct. Lateral sides of head weakly convex. Inner margin of mandible with 1 small tooth, masticatory margin with 5 large teeth and 3 small teeth. Clypeus has blunt and stout longitudinal central carina, median lobe rounded at apex. Apex of scape just reached to occipital corner, segments 4-9 of flagellum about as broad as long. Eyes smaller. In profile view dorsum of alitrunk weakly depressed at metanotal groove, promesonotal suture distinct. Dorsum of propodeum straight, about 1.8 times as long as declivity, in profile view posterodorsal corner rounded, declivity shallowly depressed. Petiolar node anteroposteriorly compressed, in profile view anterior face evenly convex, dorsal face convex, posterior face straight; in dorsal view the node nearly semicircular, width : length = 5 : 3. Subpetiolar process large, triangular. Constriction between the two basal gastral segments weak. Mandibles finely and longitudinally striate. Head, alitrunk, petiole and gaster smooth and shining. Anterior 113 of head finely and longitudinally striate. Dorsa of head and body with abundant erect or suberect short hairs, without pubescence. Antennal scapes with abundant decumbent hairs and dense decumbent pubescence. Femora and tibiae with dense decumbent hairs. Head and alitrunk black, with blue metallic luster. Petiole and gaster blackish brown. Mandibles, antennae, clypeus, legs and gastral apex reddish brown. Tarsi brownish yellow.

Paratypes: TL 4.8-5.2, HL 1.23-1.30, HW 1.00-1.07, CI 79-84, SL 0.97-1.03, SI 94-97, PW 0.70-0.77, AL 1.73-1.90, ED 0.17-0.18, ML 0.60-0.70, PL 0.37-0.40, PH 0.53-0.60, DPW 0.38-0.43, LPI 142-150, DPI 96-109 (5 measured). As holotype.

Holotype: Worker, No. A96-565, 830 m, Menglun, Mengla County, Yunnan Province, Mar.6, 1996, XU Zheng-hui. Paratypes: 7 workers, with same data as holotype; 1 worker, with same data as holotype but No. A96-1178, 700 m, Chen Zhi-ping; 14 workers, No. A97-1147, No. A97-1152, 660 m, Karst Monsoon Forest, Cuipingfeng, Menglun Town, Mengla County, Yunnan Province, Aug. 10, 1997, Liu Tai-Yong.