Omphale obscura ( Förster, 1841 )

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 obscura ( Förster, 1841)

Figs 1 H , 7 A – K

Elachestus obscurus Förster, 1841: 40, lectotype ♀, Germany, NHMV, not examined.

Holcopelte obscura (Förster): Förster, 1856: 81.

Holcopelte fulvipes Förster, 1861: 137, lectotype ♀, Switzerland, NHMV, not examined.

Horismenus obscurus (Förster): Schmiedeknecht 1909: 433.

Horismenus fulvipes (Förster): Schmiedeknecht 1909: 433.

Omphale obscura (Förster): Hansson and Shevtsova 2012: 113.

Material examined.

• 12 ♀: 4 ♀ [ NEFU; 3 on cards, 1 on slide], China, Liaoning Province, Anshan City, Qianshan , 21. VI. 2015, leg. Hui Geng, Si-Zhu Liu, Yan Gao, and Zhi-Guang Wu, by sweep netting • 3 ♀ [ NEFU; on cards], China, Liaoning Province, Huludao City, Jianchang county, Bailangshan National Nature Reserve , 04. VII. 2012, leg. Si-Zhu Liu and Jiang Liu, by sweep netting • 2 ♀ [ NEFU; 1 on card, 1 on slide], China, Xizang Autonomous Region, Medog County, Damu Village , 22–29. VI. 2017, leg. Zhaxi, by Malaise trapping • 2 ♀ [ NEFU; on cards], China, Xizang Autonomous Region, Medog County, Damu Village , 15–22. VI. 2017, leg. Zhaxi, by Malaise trapping • 1 ♀ [ NEFU; on card], China, Xizang Autonomous Region, Medog County, Gedang Village , 31. V – 05. VI. 2021, leg. Jun-Jie Fan and Jun Wu, by yellow-pan trapping .

Diagnosis.

Female. Body length 1.2–1.4 mm, mainly brown to dark brown, face and vertex with bronze metallic tinges; eyes dull red; antenna with scape yellow to pale brown, pedicel and flagellum brown to dark brown; mandibles pale brown to yellow; legs yellow to yellowish white, except dark brown claws and brown fore coxa; wings hyaline. Head (Fig. 7 A, B ) not collapsed after death; face and vertex smooth, without any reticulation; POL: OOL ~ 1.3: 1.0; frontal sulcus V-shaped, reaching eye margin, the midpoint closer to antennal toruli than to median ocellus; antennal scrobes meeting just below frontal sulcus and connected to frontal sulcus by a short longitudinal suture; HE: MS: WM ~ 3.9: 1.0: 2.3; clypeus trapezoid to triangular, as high as the width at its lower margin, lower margin protruding and emarginate; mandible with two large and pointed teeth at apex and 3–4 smaller and obtuse teeth at base. Antenna (Fig. 7 C ) with all five flagellomeres separated from each other; scape 5.3 × as long as wide, longer than pedicel + F 1; pedicel 1.8 × as long as wide; F 1 –5 with verticillate setae, setae on F 1 reaching apex of F 1, and setae on F 2–5 reaching beyond apex of flagellomere attached to; F 1 1.0 × as long and 1.4 × as wide as F 2; F 3 to F 5 slightly decreasing in both length and width. Mesosoma (Fig. 7 D, E ), 1.6 × as long as wide; mesoscutum with sparse reticulation with transverse meshes, mid lobe with two pairs of setae, with a shallow median groove in posterior 1 / 3; notauli as subtriangular impressions in posterior 1 / 2; mesoscutellum 1.3 × as long as wide, with sparse and elongate reticulation or striation and one pair of setae, anterior 1 / 2 with an indistinct and shallow median groove; metascutellum with two foveae anterolaterally, 0.4 × as long as wide, 0.3 × as long as length of median propodeum; propodeum 0.5 × as long as mesoscutellum, smooth, with a distinct and complete median carina and a pair of plicae, as well as a wide groove along anterior margin, posteromedian part forms a short nucha. Fore wing (Fig. 7 J ) 2.8 × as long as wide, speculum closed; with six to ten admarginal setae arising from both MV and from membrane just below MV; STV long and slender, PMV shorter than STV, radial cell setose, ratio of SMV: MV: PMV: STV ~ 5.9: 10.0: 1.0: 1.5. Hind wing (Fig. 7 K ) 6.3 × as long as wide, apex pointed. Legs (Fig. 7 F – H ) with metatibial spur very short, not reaching the middle of basal tarsomere. Metasoma (Fig. 7 I ) with petiole pyriform, 0.6 × as long as length of median propodeum; gaster 1.2 × as long as length of mesosoma, nearly as long as head + mesosoma; ovipositor sheaths exserted beyond apex of gaster.

Male. Not collected from China, see Hansson and Shevtsova (2012).

Host.

Dasineura viciae ( Diptera , Cecidomyiidae ) ( Bouček and Askew 1968).

Distribution.

China (Xizang Autonomous Region and Liaoning Province) (new record); Germany ( Förster 1841); Switzerland ( Förster 1861); Hungary ( Erdös 1956); Austria, Sweden, United Kingdom, Yugoslavia ( Bouček and Askew 1968); Croatia ( Bouček 1977); Czech Republic ( Kalina 1989); Italy ( De Stefani 1905); Netherlands ( Gijswijt 2003); France, Russia ( Hansson and Shevtsova 2012); Romania ( Hansson 2016).

Remarks.

The specimens collected from China have distinct propodeal plicae that almost reach the anterior margin of the propodeum, whereas the European specimens have irregular plicae that only reach half the length of the propodeum ( Hansson and Shevtsova 2012: fig. 376).

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 7. Omphale obscura, ♀ A, B head, frontal view C antenna D, E mesosoma, dorsal view F – H fore, mid and hind leg, respectively I metasoma, dorsal view J fore wing K hind wing. Scale bars: 100 μm.