Subancistrocerus kankauensis (Schulthess-Rechberg, 1934)

Tan, Jiang-Li, Wang, Meng, Xu, Hongli, Tang, Yan & Liu, Ying, 2023, Key to the species of the genus Subancistrocerus de Saussure, 1855 (Hymenoptera, Vespidae, Eumeninae) from China with description of a new species, Journal of Hymenoptera Research 95, pp. 113-127 : 113

Subancistrocerus kankauensis (Schulthess-Rechberg, 1934)

Figs 1 , 2 , 3

Odynerus kankauensis Schulthess-Rechberg, 1934: 69.

Nortonia kankauensis : Iwata 1939: 71-72 (ethology).

Ancistrocerus kankauensis : Giordani Soika 1941: 241 (in subgenus Ancistrocerus Subancistrocerus ).

Subancistrocerus kankauensis : Giordani Soika 1981: 170, figs 1, 2; 1994: 14 (key), 44, figs 7, 16.

Material examined.

“Syntypus”

Diagnosis.

♀, Length of body (up to apex of T2) 6.5 mm with forewing 5.5 mm long. Body black with yellow to brownish yellow parts as follows (Fig. 1A ): mandible except a basal black triangle and its brown translucent apex, clypeus with a brown translucent apical margin and black lateral outlines, an inter-antennal spot, scape ventrally, a small spot on the apical ocular sinus, a spot behind the eye on upper surface of temple, a pair of irregular quadrilateral patches joined on pronotum dorsally, tegula except center and outline brown translucent, parategula, contiguous metanotal spots, propodeal valvula and apical lamella of sub marginal carina of propodeum, apical outside half portion of fore femora, apex of mid- and hind femora, tarsi and dorsal tibiae and of all legs, mid and hind basitarsomere, apical bands of terga 1-3, sternite 2 and S3 medially. Brown to darkish brown as follows: pedicel and flagellar segments ventrally, legs except yellow patches mentioned previously, fourth to remaining metasomal segments. Wings hyaline with veins and pterostigma dark brown, and with a brown cloudy patch along the costal margin; body with white to yellowish brown pubescence.

Redescription.

Head. Frons deeply punctate and reticulate; temple relatively small and sparsely punctate. Clypeus as long as wide, with apical margin very weakly emarginate or nearly truncate between both very indistinct projecting teeth, which is 1/3 of the maximum width of the clypeus, moderately convex, with medial depression bounded laterally by two indistinct arched carinae. The basal half of the clypeus weakly punctate, while with apical half largely smooth (Fig. 2A, B ). Antenna short and clavate (Fig. 1B ), length of the first flagellar segment F1: width = 5.5: 4.1, F2 as wide as long, length of F3: width = 4.3: 4.8.

Mesosoma (Fig. 2C, D ). Mesosoma 1.6 × as long as wide and 1.5 × as its high. Humeral corner of pronotum rounded; pronotum, mesoscutum, mesoscutellum densely punctate, punctures obviously larger and deeper than those on head; punctures on the yellow spots of metanotum sparser than of other parts. Lower part of the mesepisternum with punctures slightly smaller and less dense than those of the upper part. Dorsal face of the propodeum not well separated from lateral and posterior faces, coarsely reticulate, metapleuron impunctate and somewhat coriaceous with transverse wrinkles.

Metasoma (Fig. 2E-G ). First tergum (T1) 1.56 × wider than long. Surface between both transverse carinae of T1 smooth and shiny; horizontal surface of T1 behind the second carina to apical margin 2.1 × as wide as long. Apical yellow band of T1 gradually narrowed towards lateral side. Terga 1-3 and S2-3 coarsely punctate with backwards open punctures, and with very narrow transparent lamellate apical margin, respectively; diameter of punctures less than distance between punctures. S3 with an arched carina laterally; fourth to remaining metasomal segments smooth basally and sparsely and finely punctate towards apical part.

Male. Similar to female except as follows (Fig. 3 ): clypeus yellow, smooth except very sparsely punctate basal half, medially convex with long pubescence, with ventral 1/3 portion strongly depressed, and with apical margin truncate and as wide as half of maximum width of clypeus (Fig. 3B ); fore femora yellow. Antenna clavate with an apical cavity on the articles 11-12 (A11-A12) and last article A13 flat, shaped as a corresponding cover reaching basis of A11, 1.5 × as long as wide, rounded at apex, subparallel-sided bilaterally (Fig. 3D ); A3-A9 laterally each with an indistinct or distinct tyloid (a carina-like prominence) without concavities ventrally. A3, A4 and A5 is 1.7 ×, 1.1 × and 1.0 × as long as wide. Basitarsomere of mid leg curved, 4.7 × as long as wide,1.2 × longer than the combine of tarsomeres 2-5 and pretarsus (Fig. 1B ).

Figures

Figure 1. Syntypes of Subancistrocerus kankauensis (Schulthess-Rechberg, 1934), habitus lateral view A female and its head frontal aspect B male.

Figure 2. Syntypes of Subancistrocerus kankauensis (Schulthess-Rechberg, 1934), female A head, frontal aspect B ibid, dorsal aspect C head and mesosoma, lateral aspect D mesosoma, dorsal aspect E metasoma, dorsal aspect F ibid, ventral aspect G ibid, lateral aspect.

Figure 3. Syntypes of Subancistrocerus kankauensis (Schulthess-Rechberg, 1934), male A habitus, dorsal aspect B head, frontal aspect C ibid, dorsal aspect D antenna E head and mesosoma, lateral aspect F apex of metaosoma, vental aspect.