Stenodynerus ninglangensis Ma & Li

Ma, Zhen-xia, Chen, Bin & Li, Ting-jing, 2016, A taxonomic account of the genus Stenodynerus from China, with descriptions of five new species (Hymenoptera, Vespidae, Eumeninae), ZooKeys 595, pp. 17-48 : 19-20

Taxon classification Animalia Hymenoptera Vespidae

Stenodynerus ninglangensis Ma & Li sp. n. Figs 1-6

Material examined.

Holotype, ♀, China, Yunnan Prov., Lijiang City, Ninglang County, Daxing Town, 27°16'37.68"N, 100°51'03.11"E, 2252 m, 26.VII. 2011, Tingjing Li, No. 1004068 (CQNU). Paratype: 1♀, same data as holotype, No. 1004069 (CQNU).

Description.

Female (Figs 1-6): body length 7.2 mm, forewing length 5.6 mm. Black; a basal band on clypeus except median interruption (Fig. 2) and inter-antennal spot yellow; the outer margin of mandible yellow to brown; the spots pale ferruginous: ventral scape, apex of ocular sinus (Fig. 2), transverse post-ocular spot, a band on dorsal surface of pronotum, mesepisternal spot, parategula, metanotum except posterior apex ventrally, apexes of femora, all tibiae and tarsi, and apical bands on metasomal terga I–II and sternum II; tegula brown.

Head. Clypeus strongly punctate, with dense setae, its width much more than length (width 1.25 × length), apex emarginated, apical width: emargination depth = 0.20: 0.04, total width: apical width = 0.86: 0.20 (Fig. 2); frons densely punctate, punctures on vertex somewhat sparser than those on frons; frons and vertex with very sparse and short setae; cephalic fovea obsolete.

Mesosoma. Pronotum, mesoscutum and scutellum densely punctate and reticulate, punctures somewhat larger and sparser than those on the head; punctures on metanotum sparser than those on other parts of the mesosoma. Anterior surface of pronotum shining, almost vertical, with few minute punctures, median foveae contiguous and V-shaped, pronotal carina complete (Fig. 3); scutellum distinct convex; metanotum oblique; dorsal and lateral surfaces of propodeum reticulate-punctate, dorsal surface broad with a weak shelf, posterior surface concave with long and transverse rugae and a median longitudinal carina (Fig. 4).

Metasoma. In dorsal view, tergum I domed, densely punctate, width 1.31 ×length and 0.85 × width of tergum II; tergum II with smaller and sparser punctures than tergum I, apex with deeper and denser punctures than other parts of tergum II, and apical margin without a distinct lamella, (Fig. 5); sternum II sparsely punctate, with a long median longitudinal furrow basally, and its anterior surface sloping (Fig. 6).

Male. Unknown.

Remarks.

This species is easily distinguished from all the other members of Stenodynerus by the following character combinations: a basal band on clypeus except median interruption yellow (Fig. 2), apex of ocular sinus ferruginous (Fig. 2), apical margin of tergum II without a distinct lamella (Fig. 5), sternum II with a long median longitudinal furrow basally, and its anterior surface sloping (Fig. 6).

Distribution.

China (Yunnan).

Etymology.

The specific name ninglangensis is the Latin adjective of the region from which the type specimens were collected.