Omphale longigena Li & Li, 2024

Li, Ming-Rui, Wang, Jia-Sheng, Jing, Ze-Ji, Meng, Qing-Fan, Zhao, Hong-Rui, Li, Xing-Peng, Liu, Sheng-Dong & Li, Cheng-De, 2024, Four new species and four newly recorded species of Omphale Haliday (Hymenoptera, Eulophidae) from China, with a key to Chinese species, ZooKeys 1215, pp. 209-234 : 209-234

Omphale longigena Li & Li sp. nov.

Figs 1 C , 4 A – J

Material examined.

Holotype: • ♀ [ NEFU; on card], China, Shandong Province, Qingdao City, Jimo District, Mashan Park , 11. VII. 2014, leg. Si-Zhu Liu, Guo-Hao Zu, and Zhi-Guang Wu, by sweep netting . Paratypes: • 12 ♀: 1 ♀ [ NEFU; on slide], same data as the holotype • 2 ♀ [ NEFU; on cards], China, Shandong Province, Qingdao City, Dahedong Village , 10. VII. 2014, leg. Si-Zhu Liu, Ye Chen and Chao Zhang, by sweep netting • 3 ♀ [ NEFU; on cards], China, Shandong Province, Qingdao City, Laoshan Scenic Spot, Beijiushui , 8–10. VII. 2014, leg. Hui Geng, Guo-Hao Zu, Zhi-Guang Wu, and Hai-Feng Bai, by yellow-pan trapping • 2 ♀ [ NEFU; 1 on card, 1 on slide], China, Guangdong Province, Shaoguan City, Chebaling National Nature Reserve , 29–30. IV. 2019, leg. Wen-Jian Li and Jun Wu, by yellow-pan trapping • 4 ♀ [ NEFU; on cards], China, Guangdong Province, Shaoguan City, Chebaling National Nature Reserve , 1–2. V. 2019, leg. Wen-Jian Li and Jun Wu, by yellow-pan trapping .

Diagnosis.

Female. Frontal sulcus slightly V-shaped; antennal scrobes meeting on frontal sulcus; antennal toruli situated completely below the level of lower eye margin; gena distinctly elongate, MS 0.4 × as long as HE; fore wing with a broad infuscate band below MV beyond speculum, extending to STV and posterior margin of wing; admarginal setae seven or eight, arising from both MV and membrane just below MV, and the most apical seta attached close to STV; PMV slightly shorter than STV.

Description.

Female. Body length 1.0– 1.2 mm. Upper face and vertex brown to dark brown with golden-green reflections, lower face yellowish brown, eyes dull red, clypeus with same color as surrounding parts of face, mandibles yellowish white with apex brown. Mesosoma with mid lobe of mesoscutum golden-green, mesoscutellum dark brown, remaining parts of mesosoma yellow to pale brown. Metasoma brown to dark brown except yellow petiole. Antenna with scape yellowish brown with dorsal margin dark brown, pedicel and flagellum brown to dark brown. All legs yellow, except dark brown tarsal claws. Fore wing with a broad infuscate band below MV beyond speculum, extending to STV and to posterior margin of wing.

Head (Fig. 4 A, B ) in frontal view 1.2 × as wide as high, usually collapsed after death; face and vertex smooth. POL: OOL ~ 1.5: 1.0; frontal sulcus slightly V-shaped, reaching eye margin, the midpoint closer to median ocellus than to antennal toruli; antennal scrobes meeting on frontal sulcus; antennal toruli situated completely below the level of lower eye margin; frontal cross-ridge present, gena distinctly elongate, HE: MS: WM ~ 2.6: 1.0: 1.8; clypeus weakly delimited with lower margin distinctly protruding, 1.8–1.9 × as wide as high; mandible with two large teeth at apex and a row of smaller teeth at base. Antenna (Fig. 4 C ) slender, with all five flagellomeres separated from each other; scape 6.3 × as long as wide; pedicel 2.2 × as long as wide, and as long as F 1; flagellomeres decreasing in width from F 1 to F 5, F 1 1.0 × as long and 1.1 × as wide as F 2.

Mesosoma (Fig. 4 D ) 1.4 × as long as wide; pronotum reduced and not visible in dorsal view; mesoscutum, mesoscutellum, metascutellum and propodeum smooth, without any sculpture; mid lobe of mesoscutum with two pairs of setae; notauli indicated only in anterior 1 / 3; mesoscutellum 1.2 × as long as wide, with one pair of setae located in median part; metascutellum smooth, nearly triangular, 0.4 × as long as wide, and 0.5 × as long as length of median propodeum; propodeum without median carina. Fore wing (Fig. 4 I ) 2.5 × as long as wide, speculum closed; with seven or eight admarginal setae arising from both MV and from membrane just below MV, with apical setae attached close to STV; PMV slightly shorter than STV, radial cell setose, ratio of SMV: MV: PMV: STV ~ 3.8: 4.9: 1.0: 1.3. Hind wing (Fig. 4 J ) 5.4 × as long as wide, apex pointed. All legs (Fig. 4 E – G ) with 4 th tarsomere slightly elongate, 0.3–0.4 × as long as whole tarsus; metatibial spur short, only reaching the middle of 1 st tarsomere.

Metasoma (Fig. 4 H ) 2.0 × as long as wide; petiole short; gaster 1.4 × as long as length of mesosoma, and longer than head + mesosoma (1.2: 1.0); ovipositor sheaths exserted beyond apex of gaster.

Male. Unknown.

Host.

Unknown.

Etymology.

The specific name refers to the elongate gena.

Distribution.

China (Shandong and Guangdong Provinces).

Remarks.

Omphale longigena sp. nov. is very similar to O. litera Jamali & Zeya, 2022 . The two species share the following characteristics: head with gena elongate, MS 0.4 × as long as HE; flagellomeres decreasing in width from F 1 to F 5; fore wing with a broad infuscate band below MV beyond speculum, extending to STV and to posterior margin of disc; mesoscutum, mesoscutellum, metascutellum and propodeum smooth. Omphale longigena sp. nov. differs from O. litera in having the antennal torulus situated completely below the level of lower eye margin (vs above lower eye margin in O. litera ); scape 6.3 × as long as wide (vs 4.2 × in O. litera ), hind leg yellow, except dark brown tarsal claws (vs hind leg with coxa, femur basally three fourths and last tarsomere brown in O. litera ). The figure in Jamali et al. (2022: fig. 2 C) shows that the scape of the holotype of O. litera was damaged, and the color of the leg usually has variation, so the latter two differences may not be reliable characters for identification. The most reliable characteristic to distinguish these two species is the position of the antennal torulus.

Figures

Figure 1. Omphale spp., habitus A O. brevibuccata, ♀, lateral B O. connectens, ♀, lateral C O. longigena sp. nov., holotype, ♀, lateral D O. longitarsus sp. nov., holotype, ♀, lateral E O. melina, ♀, dorsal F O. melina, ♂, dorsal G O. rectisulcus sp. nov., holotype, ♀, dorsal H O. obscura, ♀, lateral I O. sulciscuta, ♀, lateral. Scale bars: 500 μm.

Figure 4. Omphale longigena sp. nov., paratype, ♀ A, B head, frontal view C antenna D mesosoma, dorsal view E – G fore, mid and hind leg, respectively H metasoma, dorsal view I fore wing J hind wing. Scale bars: 100 μm.