Closterocerus shaanxiensis Li & Li, 2021

Li, Ming-Rui & Li, Cheng-De, 2021, Four new species of Closterocerus Westwood (Hymenoptera, Eulophidae) from China, with a key to Chinese species, ZooKeys 1017, pp. 21-36 : 21

Closterocerus shaanxiensis Li & Li sp. nov. Figs 10 , 11-18

Type material.

Holotype: ♀ [NEFU; on slide], China, Shaanxi Province, Ankang City, Ningshan County, Chengguan Town, Huoditang Forestry Station, 11.VIII.2015, Ye Chen and Chao Zhang, sweeping. Paratype: 1♀ [on card], China, Shaanxi Province, Ankang City, Ningshan County, Chengguan Town, Huoditang Forestry Station, 09.VIII.2015, Ye Chen and Chao Zhang, sweeping.

Diagnosis.

Frontal sulcus straight, reaching eye margins; fore wing with band I V-shaped, with upper arm much longer and darker than lower arm, the lower arm obscure; band II distinct and interrupted medially; band III V-shaped, obscure, much paler than band I and II, with upper arm slightly longer than lower arm; the three bands are separated from each other; fore wing without stigmal hairline, radial cell setose; below base of cubital setal line with nine setae in a row; propodeal plica present, spiracular sulcus absent.

Description.

Female. Length 1.1-1.3 mm. Scape and pedicel dark brown to black. Flagellum dark brown to pale brown, becoming gradually paler distad. Eyes red, ocelli pale brown to red. Vertex and frons above frontal sulcus golden-green to golden-blue. Frons below frontal sulcus mainly golden-yellow with golden-green tinge. Pronotal collar, mesoscutum, mesoscutellum and axillae golden-green to golden-yellow in dorsal view, golden-blue in lateral view. Metanotum and propodeum brown, without metallic reflections, except the median part of metascutellum concolorous with mesoscutellum. Fore wing (Fig. 16 ) with band I V-shaped, with upper arm much longer and darker than lower arm, the lower arm much obscure; band II distinct and interrupted medially; band III V-shaped, obscure, much paler than the band I and II, with upper arm slightly longer than lower arm; the three are separated from each other. Legs with all coxae, femora and tarsal claws dark brown; trochanters pale brown; protibiae mainly pale yellow, pale brown basally; mesotibiae with basal half pale brown and apical half pale yellow; metatibiae dark brown; tarsi pale yellow with last tarsomere pale brown to brown. Metasoma brown with rather weak reflections.

Head (Figs 11 , 12 ), in frontal view 1.45 times as wide as high. Sculpture on vertex and frons above frontal sulcus nearly with the same sized meshes. POL: OOL = 6: 5. Frontal sulcus straight, reaching eye margins; inner eye margins slightly concave in lower part. Antennal scrobes join on frontal sulcus. Malar sulcus absent, but with a curved transverse carina near clypeus, extending to lower margin of eyes. Clypeus not delimited. HE: MS: WM about 3.9: 1.0: 2.2. Antenna (Fig. 13 ) inserted slightly above level of lower margin of eyes. Scape reticulate, extremely compressed, and expanded from base to apex, about 2.2 times as long as wide. Pedicel moderately compressed compared to the extremely compressed scape, slightly longer than wide (about 9: 8). Flagellum extremely compressed; F1 wider than long; F2 and F3 quadrate; F4 slightly longer than wide; F2 widest and longest and gradually tapering from F2 to F5; F5 with terminal spine shorter than the segment.

Mesosoma (Figs 14 , 15 ). Pronotum, mesoscutum, mesoscutellum and axillae with reticulate sculpture, meshes nearly of same size. Metascutellum with irregular rugae. Pronotum transverse, invisible in dorsal view. Median area of mesoscutal midlobe with two pairs of setae. Notauli curved in anterior part, and indicated posteriorly by depression. Mesoscutellum approx. as long as wide. Axillae slightly advanced forwards in front of level of anterior margin of mesoscutellum. Mesoscutum and mesoscutellum slightly convex. Metascutellum about 3/5 as long as median length of propodeum. Propodeum without reticulate sculpture, with a short median carina delimited by a transverse carina posteriorly. Propodeal plica present, spiracular sulcus absent. Fore wing (Fig. 16 ) about twice as long as wide, without stigmal hairline, radial cell setose. Speculum closed below. Ratio length of: SMV: MV: PMV: STV about 4: 8: 1: 1. Cubital setal line straight and completely extending to base of MV. Below base of cubital setal line with nine setae in a row. Hind wing (Fig. 16 ) about 4.5 times as long as wide. Legs (Fig. 18 ) normal.

Metasoma (Fig. 17 ) ovate; petiole short, pyriform; ovipositor exserted beyond apex of metasoma.

Male. Unknown.

Host.

Unknown.

Etymology.

The specific name is derived from the name of the collection locality, Shaanxi Province.

Distribution.

China (Shaanxi Province).

Remarks.

Closterocerus shaanxiensis sp. nov. is similar to C. rectisulcus sp. nov., but differs as follows: fore wing below base of cubital setal line with nine setae in a row (five in C. rectisulcus ); propodeum smooth, without reticulate sculpture (with reticulate sculpture posteriorly in C. rectisulcus ); propodeal plica present (absent in C. rectisulcus ); spiracular sulcus absent (present in C. rectisulcus ). The pattern on the fore wing and color of the metasoma are also different from that in C. rectisulcus : band III obscure, much paler than band I and II; the three bands are separated from each other (in C. rectisulcus , band III distinct, only slightly paler than band I and II; the three bands are nearly connected in the middle); metasoma brown (dark brown in C. rectisulcus ).

Figures

Figure 10. Closterocerus shaanxiensis Li & Li, sp. nov., holotype, female, habitus in dorsal view, before dissection. Scale bar: 200 μm.

Figures 11 - 18. Closterocerus shaanxiensis Li & Li, sp. nov., holotype, female, on slide (except 11 and 14, which are photographed before slide-mounting): 11 head, frontal view 12 mandibles 13 antenna 14, 15 mesosoma and petiole 16 fore and hind wings 17 metasoma without petiole 18 legs, from left to right: fore, mid and hind leg. Scale bars: 100 μm.