Stenodyneriellus similiguttulatus, Li & Chen, 2016

Li, Ting-Jing & Chen, Bin, 2016, Two newly recorded genera Stenodyneriellus and Lissodynerus with three new species from China (Hymenoptera, Vespidae, Eumeninae), Journal of Hymenoptera Research 49, pp. 111-127 : 113-114

Stenodyneriellus similiguttulatus sp. n.

Figs 1-9

Material examined.

Holotype, ♀, China, Yunnan Province, Xishuangbanna State, Jinghong City, Manwai Village , 22°01'6.36"N, 100°50'30.65"E, 591-721m, 30.VII.2003, Qian Jiang, No. 1004061 (CQNU) . Paratypes: 1♀ 1♂, same data as holotype, No. 1004062, 1004063 (YNAU) .

Description.

Female (Figs 1 , 3-4 , 6 , 8 ): body length 8.0 mm, forewing length 7.0 mm. Black, with the following parts yellow: clypeus except medial goblet-shaped black spot (Fig. 3 ), mandible basally, scape ventrally, a large and wide band along inner eye orbit from basis of clypeus to upper frons occupying entire ocular sinus, interantennal spot, a spot on vertex, gena almost entirely, dorsal surface of pronotum anteriorly, a large dorsal spot and a small ventral spot on mesepisternum, tegula anteriorly and posteriorly, parategula, anterior half of scutellum, a large spot on dorsal surface of propodeum apically, a apical band on each of T1-T5 (Fig. 1 ) and S2, a round spot on the base of T2 laterally, irregular spots on lateral margin of S2 medially and apical margins of S3-S4 laterally (Fig. 8 ), elongated spots on front and mid femora inside, and all tibiae laterally; antenna except scape ventrally, legs except yellow parts, and tegula medially brown to dark brown. Wings lightly infuscate. Setae pale brown.

Head. Clypeus medially somewhat convex, with shallow, very thick and minute punctures, apex almost truncated and somewhat emarginated medially (Fig. 3 ), clypeal width 1.07 × its length, total width: apical width = 1.16: 0.4, apical width nearly equal to interantennal space; interantennal carina prominent; frons evenly convex and very coarsely punctate, interspaces between punctures with carinae and reticulate; vertex sparsely punctate, cephalic fovea obsolete; POD nearly as wide as OOD.

Mesosoma. Pronotum, mesoscutum, mesepisternum, mesoscutellum and metanotum very coarsely punctate and reticulate, these punctures distinctly deeper than those on frons, punctures on pronotum, mesoscutum and mesoscutellum somewhat sparser than those on mesepisternum and metanotum, and their interspaces with very small and shallow punctures. Pronotal carina complete, rounded dorsally and emarginated laterally; mesoscutum, mesepisternum, mesoscutellum normal; metanotum flat and only apically sloping; propodeum well-developed, dorsal surface almost in the same horizontal plane as metanotum, prolonged in a medial direction protruding upward so as to form two teeth behind metanotum (Fig. 4 ), well-separated from posterior surface, densely punctate, but obviously sparser and smoother than those on metanotum, interspaces between punctures polished; lateral surface of propodeum punctate and somewhat reticulate, punctures smaller and sparser than mesepisternum; posterior surface widely and deeply concave, smooth and with few punctures. Tegula wide, length slightly longer than its width, and posterior lobe small; parategula hooked and its apex just reaching the apex of tegula.

Metasoma. In dorsal view, T1 domed, its width 1.93 × length and 0.81 × width of T2, without a transverse carina anteriorly, with sparse punctures, punctures distinctly sparser and smaller than those on frons and mesosoma; T2 with a translucent, thin and blade-shaped lamella apically (Fig. 6 ), punctures on T2 more unobvious than those on T1; S2 widely depressed basally, and with moderate punctures (Fig. 8 ); visible part of T3-T6 and S3-S6 coriaceous and with minute punctures; the apical yellow bands on T1-T2 obviously wider than those on T3-T5 and with U-shaped gaps medially, the apical yellow band on S2 interrupted medially.

Male (Figs 2 , 5 , 7 , 9 ). Body length 7.5 mm, forewing length 8.0 mm. Sculpture, punctuation, setae, and coloration as in female except as follows: yellow spots and bands on the body correspondingly smaller than those in female, clypeus largely black, a surrounding band basally and two spots on the apex laterally yellow (Fig. 5 ); T2 without a yellow spot laterally; clypeal width 0.97 × its length, total width: apical width = 1.45: 0.6; A13 small, short, and backward only reaching the middle of A11 (Fig. 7 ); these two teeth on dorsal surface of propodeum sharper than those in female; width of T1 2.0 × its length and 0.86 × width of T2; genitalia as in Fig. 9 , apical tip of penis valve somewhat oblong, volsella wide and blunt apically, and parallel spines elongate without setae; other characters same as those in female.

Remarks.

This species resembles S. guttulatus (Saussure, 1862) by T2 with a translucent, thin, blade-shaped lamella apically (Fig. 6 ), and propodeum protruding upward so as to form two teeth behind metanotum dorsally (Fig. 4 ). It differs from S. guttulatus and all other members of the genus by the following character combination: male A13 reaching the middle of A11 (Fig. 7 ); female scutum and T1 without yellow spots (Fig. 1 ); in genitalia, apical tip of penis valve somewhat oblong, and volsella wide and blunt apically (Fig. 9 ).

Distribution.

China (Yunnan).

Etymology.

The specific name Stenodyneriellus similiguttulatus is named after the similar species S. guttulatus (Saussure, 1862), combined with the Latin word similis (= similar).

Figures

Figures 1 - 9. Stenodyneriellus similiguttulatus sp. n. 1 habitus of holotype (dorsal view), ♀ 2 habitus of one paratype (dorsal view), ♂ 3 clypeus, ♀ 4 propodeum, ♀ 5 clypeus, ♂ 6 T 2 (dorsal view), ♀ 7 apex of antenna, ♂ 8 S 2 - S 4 (ventral view), ♀ 9 genitalia (front view), ♂.