Closterocerus separatus 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 separatus Li & Li sp. nov. Figs 19-21 , 22-27

Type material.

Holotype: ♀ [NEFU; on slide], China, Heilongjiang Province, Hegang City, Wuzhishan Park, 22.VII.2020, Ming-Rui Li, sweeping. Paratypes: 2♀ [on slides], same data as holotype; 2♀ [on slides], China, Heilongjiang Province, Hegang City, Beishan Park, 11.VII.2020, Ming-Rui Li, sweeping; 1♀ [in alcohol], China, Hebei Province, Chengde City, Mountain Wu Ling, 16.VII.2017, Guang-Xin Wang and Wen-Jian Li, sweeping.

Diagnosis.

Female. Head, in frontal view, oval, 1.4 times as wide as high; scape strongly compressed, and extremely expanded distad, 2.4 times as long as wide; fore wing with band I replaced by an obscure infuscate cloud; band II obvious, reaching hind margin of fore wing; band III extended along apical margin, obvious, slightly protruded inwards medially; the cloud and two bands are separated from each other; between cubital setal line and the hind margin of fore wing with a longitudinal infuscation; ventral margin of metafemur with six long setae.

Description.

Female. Length 1.06-1.15 mm. Antennae dark brown. Eyes and ocelli dull red. Frons golden-yellow to golden-green. Vertex golden-green in dorsal view, golden-blue in lateral view and frontal view. Mandibles pale brown. Pronotal collar, mesoscutum, mesoscutellum, axillae and metascutellum golden-green in dorsal view, golden-blue in lateral view. Propodeum, mesopleuron and metapleuron brown, dark brown to black. Legs with all coxae, femora and tarsal claws dark brown; pro- and mesotrochanters pale brown, metatrochanters dark brown; protibiae mainly pale yellow, pale brown basally; mesotibiae mainly pale yellow; metatibiae dark brown; all tarsi pale yellow, but first segment of metatarsi dark brown. Fore wing (Fig. 25 ) with band I replaced by an obscure infuscate cloud; band II obvious, reaching hind margin; band III extending along apical margin, obvious, slightly protruded inwards medially; the cloud and two bands are separated from each other; between cubital setal line and the hind margin of fore wing with a longitudinal infuscation. Metasoma dark brown with weak metallic green to blue reflections.

Head (Figs 20 , 22 ), oval in frontal view, 1.4 times as wide as high. Meshes of reticulate sculpture on vertex and frons below frontal sulcus smaller than that on frons above frontal sulcus. POL: OOL = 5: 4. Frontal sulcus V-shaped, reaching eye margins; inner eye margins concave medially. Antennal scrobes join on the 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 4.0: 1.0: 2.0. Antenna (Fig. 23 ) inserted above level of lower margin of eyes. Scape strongly compressed, and extremely expanded distad, 2.4 times as long as wide. Pedicel moderately compressed compared to the extremely compressed scape, nearly as long as wide. Flagellum extremely compressed; F1-4 wider than long, F2 slightly larger than F1 and F3; F3 wider than F4; F5 small, almost oval, with terminal spine long and nearly as long as the segment.

Mesosoma (Figs 21 , 24 ). Pronotum, mesoscutum, axillae and mesoscutellum (except posterior margin) with reticulate sculpture, meshes nearly of same size. Metascutellum and propodeum smooth. Along pronotal collar with four strong setae. Median area of midlobe of mesoscutum with three pairs of setae. Notauli curved in anterior part, and indicated posteriorly by depression. Mesoscutellum as long as wide. Axillae slightly advanced forwards in front of level of anterior margin of mesoscutellum. Mesoscutum and mesoscutellum rather flat. Metascutellum large, about half median length of propodeum. Propodeum without any carina in middle part. Fore wing (Fig. 25 ) twice as long as wide, with a stigmal hairline, radial cell bare. Speculum nearly elongate-triangular, closed below. Ratio length of: SMV: MV: PMV: STV about 5: 11: 1: 2. Cubital setal line straight and completely extending to base of MV. Hind wing (Fig. 25 ) narrow, about 6.2 times as long as wide. Legs (Fig. 27 ) normal, with all coxae reticulate on outer surfaces; ventral margin of metafemur with six long setae.

Metasoma (Fig. 26 ). Ovate; petiole short, pyriform; ovipositor exserted beyond apex of metasoma.

Male. Unknown.

Host.

Unknown.

Etymology.

The name refers to the separated distal two cross bands of fore wing ( Closterocerus separatus is Latin for separate).

Distribution.

China (Heilongjiang, Hebei provinces).

Remarks.

Closterocerus separatus sp. nov. is similar to C. africanus Waterston, 1925, C. cruy (Girault, 1918) and C. mirabilis Edwards & La Salle, 2004, according to the original descriptions. They share the following characters with the new species: fore wing with an infuscate cloud and two infuscate bands; between cubital setal line and the hind margin of fore wing with a longitudinal infuscation; but the new species differs from C. africanus by having the head 1.4 times as wide as high in frontal view (1.6 times in C. africanus ); ventral margin of metafemur with six long setae (ten setae in C. africanus ); the area between infuscate cloud and band II of fore wing hyaline (slightly infuscate in C. africanus ). The new species differs from C. cruy and C. mirabilis in having the infuscate cloud and two bands on the fore wing separated from each other (the cloud is distinctly connected with band II, and band III is nearly connected with band II in C. mirabilis ; band II is distinctly connected to the cloud and bands III in C. cruy ); apex of scape wider, about 0.4 times as wide as the length of scape (at most 0.3 times in C. cruy and C. mirabilis ).

Figures

Figures 19 - 21. Closterocerus separatus Li & Li, sp. nov., holotype, female 19 habitus in lateral view, before dissection 20 head, frontal view, before slide-mounting 21 mesosoma, before slide-mounting. Scale bars: 100 μm.

Figures 22 - 27. Closterocerus separatus Li & Li, sp. nov., holotype, female, on slide: 22 head, frontal view 23 antenna 24 mesosoma 25 fore and hind wings, arrow shows longitudinal infuscation between cubital setal line and the hind margin 26 metasoma 27 legs, from left to right: fore, mid and hind leg. Scale bars: 100 μm.