Stenodynerus tenuilamellatus 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 : 24

Taxon classification Animalia Hymenoptera Vespidae

Stenodynerus tenuilamellatus Ma & Li sp. n. Figs 30-36

Material examined.

Holotype, ♀, China, Yunnan Prov., Baoshan City, Tengchong County, Zhonghe Village, 25°31'55.10"N, 98°23'44.21"E, 1663 m, 29.VII.2015, Zenghui Huang & Siyu Xie, No. 1004076 (CQNU). Paratype: 1♀, China, Yunnan Prov., Baoshan City, Tengchong County, Jietou Village, 25°25'11.18"N, 98°39'42.75"E, 1631 m, 15.VII.2006, Li Ma, No. 1004077 (CQNU).

Description.

Female (Figs 30-36): body length 8.0 mm, forewing length 6.7 mm. Black; a minute spot on clypeus basally, inter-antennal spot, and scape ventrally yellow; with the following parategula, metanotum except posterior apex ventrally, apical bands on metasomal terga I–II and sternum II, and the dorsal surface of fore femur; tegula brown.

Head. Clypeus convex medially with sparse punctures and setae, its width somewhat more than length (width 1.08 × length), apex slightly emarginated, apical width: emargination depth = 0.26: 0.07, total width: apical width = 0.96: 0.26 (Fig. 31); frons and vertex densely punctate and reticulate, with short setae; cephalic fovea obsolete.

Mesosoma. Masosoma densely punctate and reticulate, punctures generally larger than those on the head; punctures on pronotal dorsum denser than those on other parts of the masosoma (Fig. 30). Anterior surface of pronotum somewhat sloping, with a few punctures and a pair of round separated median foveae, the interspace between two median foveae almost equal to one fovea diameter, pronotal carina complete (Fig. 32); scutellum distinctly convex; metanotum nearly vertical; dorsal and lateral surfaces of propodeum reticulate-punctate; dorsal surface narrow with a moderate shelf; posterior surface concave with long and transverse rugae and a median longitudinal carina (Fig. 34).

Metasoma. In dorsal view, tergum I campanulate, coarsely punctate, width 1.59 × length and 0.81 × width of tergum II, anterior surface vertical, almost impunctate, and with a median longitudinal carina in upper half (Fig. 33); tergum II with smaller and sparser punctures than tergum I, and with a narrow reflex apical lamella, a row of deep and dense punctures forming a narrow transverse groove on the base of lamella (Fig. 36); sternum II sparsely punctate, without a median longitudinal furrow basally, and its anterior surface vertical (Fig. 35).

Male. Unknown.

Remark.

This species is similar to Stenodynerus pappi by a median longitudinal carina on propodeal concavity (Fig. 34), and anterior vertical surface of tergum I with a longitudinal median carina in upper half (Fig. 33). It is different from Stenodynerus pappi and other members of the genus in the following characters: clypeus with a minute spot basally (Fig. 31); propodeal shelf moderately (Fig. 34); apical lamella of metasomal tergum II distinctly narrower than that of Stenodynerus pappi (Figs 36, 82), and sternum II without a median longitudinal furrow basally, and its anterior surface vertical (Fig. 35).

Distribution.

China (Yunnan).

Etymology.

The specific name tenuilamellatus is derived from two Latin words: tenuis (= narrow) and lamellatus (= lamella), which refers to metasomal tergum II with a narrow apical lamella.