Omphale rectisulcus 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 rectisulcus Li & Li sp. nov.

Figs 1 G , 8 A – K

Type material.

Holotype: • ♀ [ NEFU; on card], China, Jiangxi Province, Shangrao City, Yanshan County, Yejiachang Village , 7. VII. 2013, leg. Chao Zhang, by sweep netting . Paratypes: • 1 ♀ [ NEFU; on slide], China, Sichuan Province, Guangyuan City , Qingchuan County, 20. VIII. 2015, leg. Ye Chen and Chao Zhang, by sweep netting .

Diagnosis.

Female. Frontal sulcus straight, reaching eye margin, distance from frontal sulcus to median ocellus is as long as distance to toruli; antennal scrobes slightly wide and deep, as grooves rather than sulcus, meeting below frontal sulcus and connected to frontal sulcus by a short longitudinal suture; clypeus with both upper and lower margins arcuate, nearly oval-shaped, 2.0 × as wide as high; notauli step-shaped, indicated by smooth depressions; propodeum with a narrow groove along anterior margin, without median carina.

Description.

Female. Body length 1.5–1.6 mm. Face and vertex dark brown with weak golden-green and bronze reflections; eyes dull red; clypeus with same color as surrounding parts of face; mandibles yellowish white with apex brown; mesosoma brown with golden-blue and golden-green reflections; metasoma brown to dark brown except yellow petiole; antenna with scape yellowish white, pedicel and flagellum brown; all legs yellowish white except fore coxae and fore tarsi, which are brown or yellowish brown; fore wings hyaline.

Head (Fig. 8 A, B ) in frontal view 1.2 × as wide as high; face and vertex smooth, only parts around antennal toruli with very weak reticulation and genae with weak transverse sculpture; occipital margin with a sharp edge; POL: OOL ~ 1.3: 1.0; frontal sulcus straight, reaching eye margin, distance from frontal sulcus to median ocellus as long as distance to antennal toruli; antennal scrobes slightly wide and deep, meeting below frontal sulcus and connected to frontal sulcus by a short longitudinal suture; frontal cross-ridge slightly W-shaped and not reaching eye margin; clypeus with both upper and lower margins arcuate, nearly oval-shaped, 2.0 × as wide as high; mandible with two large teeth at apex and five smaller teeth at base; gena curved and slightly convex; HE: MS: WM ~ 5.7: 1.0: 4.7. Antenna (Fig. 8 C ) with all five flagellomeres separated from each other; scape 4.7 × as long as wide; pedicel 1.8 × as long as wide, and 0.75 × as long as F 1; flagellomeres with F 1, F 2 and F 3 almost equal in length, width of basal part of F 1 equal to width of F 2, but widest part of F 1 1.5 × as wide as F 2.

Mesosoma (Fig. 8 D, E ) 1.5 × as long as wide; pronotum reduced and not visible in dorsal view; mesoscutum with shallow polygonal reticulation, meshes of reticulation barely elongate or transverse; notauli step-shaped, indicated by smooth depressions; median part of mesoscutum with two pairs of setae, and posterior margin slightly emarginate; mesoscutellum 1.2 × as long as wide, with same reticulation as mesoscutum, anterior 1 / 4–1 / 3 with a weak median groove, anterior corners impressed, single pair of setae located in the lower middle of scutellum; axillae with weak reticulation; metascutellum smooth, 0.4 × as long as wide, and 0.5–0.6 × as long as length of median propodeum, with two foveae anterolaterally; lateral panels of metanotum smooth; propodeum smooth with a narrow groove along anterior margin, without median carina. Fore wing (Fig. 8 J ) 2.3 × as long as wide, speculum closed; with seven admarginal setae arising from both MV and from membrane just below MV; PMV distinctly longer than STV, radial cell bare; ratio of SMV: MV: PMV: STV ~ 4.2: 7.5: 2.1: 1.0. Hind wing (Fig. 8 K ) 4.8 × as long as wide, apex rounded. Legs (Fig. 8 F – H ) with metatibial spur nearly reaching apex of basal tarsomere.

Metasoma (Fig. 8 I ) with petiole short and wide; gaster 1.9 × 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 straight frontal sulcus (recti - is Latin for straight).

Distribution.

China (Sichuan and Jiangxi Provinces).

Remarks.

Omphale rectisulcus sp. nov. should belong to the huggerti group, and is closest to O. aperta Hansson, 2004 . The two species share the following characteristics: frontal sulcus straight or nearly straight; antennal scrobes meeting below frontal sulcus and connected to frontal sulcus by a short longitudinal suture; metascutellum flat, with two foveae anterolaterally; petiole short and wide. Omphale rectisulcus sp. nov. differs from O. aperta in having the clypeus nearly oval-shaped (vs nearly semicircular in O. aperta ); fore wing with seven admarginal setae arising from MV and membrane just below MV (vs six in O. aperta ), speculum closed (vs open below in O. aperta ), PMV distinctly longer than STV (vs shorter than in O. aperta ); propodeum without median carina (vs with median carina in O. aperta ).

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 8. Omphale rectisulcus sp. nov., paratype, ♀ 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.