Stenodynerus tongrenensis Zeng, Chen, & Li, 2024

Zeng, Xin, Chen, Bin & Li, Ting-Jing, 2024, The genus Stenodynerus de Saussure, 1863 (Hymenoptera: Vespidae: Eumeninae) from China: a new species, new records, and key to the species, Zootaxa 5514 (4), pp. 385-400 : 386-387

Stenodynerus tongrenensis Zeng, Chen, & Li , sp. nov.

( Figs 1–4, 6–10 )

Material examined. HOLOTYPE, China: ♀, Guizhou Province, Tongren City, Jiangkou County, Taiping Town , 27°49′50″N, 108°45′55″E, 28.VI.2015, Zhenxia Ma ( CNU) . PARATYPE, China: 1♀, Guizhou Province, Tongren City, Jiangkou County, Minxiao Town , 27°38′56″N, 108°41′41″E, 29.VI.2015, Tingjing Li ( CNU) .

Diagnosis. Female. This species is similar to S. frauenfeldi by apical border of T2 barely depressed ( Fig. 9 ), anterior surface of pronotum medially with long parallel transverse striae above foveae ( Fig. 7 ), propodeal concavity ventrally with a short median longitudinal carina ( Fig. 6 ), and S2 ventrally in basal portion with a long median longitudinal furrow ( Fig. 10 ). It is differentiated from S. frauenfeldi and other members of the genus in the combination of following characters: cephalic foveae shallow, not noticeable in the surrounding punctures ( Fig. 3 ); gena ( Fig. 4 ) wide, (0.90–0.95) × as wide as eye at bottom of ocular sinus, in the related species S. frauenfeldi gena ( Fig. 5 ) obviously narrower (0.50–0.55) × as wide as eye at bottom of ocular sinus; anterior surface of pronotum sloping, pronotal carina medially interrupted ( Fig. 7 ); and both T2 and S2 with sparser and smaller punctures ( Figs 9, 10 ). Male is unknown.

Description. Female ( Fig. 1 ). Body length 8.5–9.1 mm (holotype: 9.1 mm), fore wing length 7.2–7.9 mm (holotype: 7.9 mm). Body black, with short setae; following parts yellow: small lateral spots at the base of clypeus, a basal spot on mandible, scape ventrally, a small spot on upper gena ( Fig. 4 ), two large, separated spots on pronotum anteriorly, parategula largely, anterior part of metanotum, wide apical bands on T1 and T2, narrow apical band on S2, and outer face of fore tibia; tegula and wings brown.

Head ( Fig. 2 ) slightly wider than long in frontal view, maximum width 1.07× its length; clypeus with sparse punctures and setae laterally, clypeal maximum width 1.17× its length, slightly convex and somewhat shovel-shaped, apex shallowly emarginate, apical width 1.07× distance between antennal sockets, width of clypeus 3.18× its apical width, apical width 7.4× its emargination depth; inter-antennal space with longitudinal carina; lower part of frons coarsely punctate and distinctly reticulated, punctures on upper frons and vertex weaker; cephalic foveae shallow, not noticeable in the surrounding punctures, its width less than the distance between posterior ocelli ( Fig. 3 ); gena ( Fig. 4 ) wide, (0.90–0.95) × as wide as eye at bottom of ocular sinus.

Mesosoma densely punctate and reticulate, punctures on posterior part of mesoscutum and scutellum more or less sparse; punctures on propodeum flat-bottomed and distinctly larger than those on other parts of mesosoma. Anterior surface of pronotum sloping, distinctly punctate, and median foveae almost U-shaped, a few long parallel transverse striae above median foveae, pronotal carina medially interrupted on dorsal side ( Fig. 7 ); scutellum somewhat convex; metanotum oblique, with short median longitudinal furrow not dividing metanotum into two parts; propodeum medially with a short transverse plane behind metanotum, shorter than length of metanotum, dorsal and lateral surfaces of propodeum reticulate-punctate, posterior surface concave with transverse rugae and a very short median longitudinal carina in lower portion ( Fig. 6 ).

Metasoma ( Fig. 9 ) in dorsal view with T1 campanulate; T1 coarsely and densely punctate, maximum width 1.51× as wide as long, 0.80× as wide as T2, and anterior width a little narrower than the posterior one; T2 with smaller and sparser punctures than T1, apex with deeper and denser punctures than other parts of T2, and apical border of T2 barely depressed ( Fig. 9 ); anterior surface of S2 sloping, in lateral view S2 rounded basally ( Fig. 8 ), S2 with sparser and shallower punctures than those on T2 and ventrally in basal portion with a long median longitudinal furrow ( Fig. 10 ); punctures of visible parts of T3–T5 larger and denser than those on T2; S3–S4 with minute punctures.

Male. Unknown.

Distribution. China (Guizhou).

Etymology. The specific name tongrenensis refers to the type locality of this species, Tongren City ( China, Guizhou Province).

Figures

FIGURES 1–10. 1–4, 6–10. Stenodynerus tongrenensis sp. nov., holotype, ♀. 5. S. frauenfeldi, ♀. 1. Habitus, dorsal view. 2. Head, frontal view. 3. Head, dorsal view. 4, 5. Head, lateral view. 6. Propodeum, dorsal view. 7. Pronotum, frontal view. 8. Metasomal segments 2–6, lateral view. 9. T1–T6, dorsal view. 10. S2–S6, ventral view.