Strumigenys yangi

Nothing is known about the biology of .

Identification
Xu & Zhou (2004) - Close to Strumigenys carinognatha but vertex without a pair of erect hairs, scape with a row of spatulate hairs on the leading edge, first tergite of gaster with only 2 pairs of clavate hairs.

Distribution based on Regional Taxon Lists
Palaearctic Region: China.

Nomenclature

 *  yangi. Pyramica yangi Xu & Zhou, 2004: 447, figs. 25, 26 (w.) CHINA. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 130

Worker
Holotype. TL1.8, HL 0.45, HW 0.40, CJ 89, ML 0.13, MI 28, SL 0.23, SI 56, PW 0.24, AL 0.50. Head violin-like, longer than broad, posterior portion distinctly broader than anterior portion. In full face view, occipital margin deeply and roundly concave, occipital corners roundly prominent. Lateral sides of posterior 2/3 roundly convex, lateral sides of anterior 1/3 straight and slightly widened forward, and angularly notched just behind the antennal sockets. Mandible triangular, dorsum depressed, with a transverse basal rim and an oblique dorsolateral ridge along the depressed dorsal surface, masticatory margin with about 10 small acute teeth. Dorsum of clypeus depressed, anterior margin weakly convex. Antennal scrobe distinctly depressed. Antenna with 6 segments, antennal club 2-segmented, basal corner of scape prominent and bluntly angled, apex of scape reached to 2/3 of the distance from antennal socket to occipital corner. Eye indistinct and with only 1 ommatidium. In profile view, vertex strongly prominent and formed nearly a right angle, dorsal face and posterior face straight. Dorsum of pronotum nearly straight, dorsum of mesonotum roundly convex, promesonotal suture and metanotal groove weakly impressed. Dorsum of propodeum nearly straight and slope down backward, posterodorsal corner rounded. Declivity roundly and deeply concave, lateral sides with narrow vertical spongiform lobes, posterodorsal corner of the lobe bluntly angled. In dorsal view, pronotum weakly depressed in central area and with blunt lateral margins. In profile view, petiole with rectangular ventral spongiform appendage, petiolar node roundly prominent, posterior border with narrow spongiform appendage. Postpetiolar node roundly convex, lateral sides and posterior border with large triangular spongiform appendages.

Mandibles and clypeus with micro-punctures and relatively shining. Head densely coarsely punctured and opaque. Dorsum of alitrunk with micro-punctures and relatively shining. Lateral sides of alitrunk smooth and shining. Petiolar node with micro-punctures and relatively shining. Postpetiolar node and gaster smooth and shining, first tergite of gaster with longitudinal basal costulae. Body surface with sparse pubescences, pilosity rare. Antennae and legs with abundant pubescences. Leading edge of scape with a row of rightly curved and apically directed spatulate hairs. Head, alitrunk, petiole and postpetiole without standing hairs. First tergite of gaster with 2 pairs of clavate erect hairs, tergites 2-4 each with 1 pair of apically blunt hairs. Body color yellow, the spongiform appendages light yellow.

Type Material
Holotype worker, No. A98-1001, 700 m, Manyangguang Village, Menglun Town, Mengla County, Xishuangbanna Prefecture, Yunnan Province, 15 Mar. 1998, collected by Mr. Yang Xiao-Dong. The type specimens are deposited in the Insect Collection, Faculty of Conservation Biology, Southwest Forestry College, Kunming, Yunnan, China.

Etymology
The new species is named after the type specimen collector Mr. Yang Xiao-Dong.

References based on Global Ant Biodiversity Informatics

 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Xu Z. H., and X. G. Zhou. 2004. Systematic study on the ant genus Pyramica Roger (Hymenoptera, Formicidae) of China. Acta Zootaxonomica Sinica 29: 440-450.
 * Xu Z. and X.-G. Zhou. 2004. Systematic study on the ant genus Pyramica Roger (Hymenoptera, Formicidae) of China. Acta Zootaxonomica Sinica 29(3): 440-450.