Oomyzus flavotibialis, Li & Li, 2020

Li, Wen-Jian & Li, Cheng-De, 2020, A new species of Oomyzus Rondani (Hymenoptera, Eulophidae) and first record of O. gallerucae (Fonscolombe) from China, with a key to Chinese species, ZooKeys 950, pp. 41-49 : 41

Oomyzus flavotibialis sp. nov. Figures 1-6 , 7-8

Type material.

Holotype: female [on slide], China, Liaoning Province, Anshan City, Mount Qian Shan, 23.VI.2015, Hui Geng, Yan Gao, Zhi-Guang Wu, and Si-Zhu Liu, by sweeping. Deposited in NEFU.

Paratypes: 8 females, 1 male. China. Liaoning Province, same data as holotype, [1 female on card]; Anshan City, Mount Qian Shan, 25.VI.2015, Hui Geng, Yan Gao, Si-Zhu Liu, and Zhi-Guang Wu, sweeping, [2 females on slides]; Anshan City, Mount Qian Shan, 20.IX.2015, Hui Geng, Yan Gao, and Xin-Yu Zhang, sweeping, [2 females on slides]; Fushun City, 18.VI.2012, Hui Geng, Xiang-Xiang Jin, and Jiang Liu, sweeping, [1 female on slide]; Shandong Province, Pingdu City, Mount Daze, 18.VII.2014, Hui Geng, Yan Gao, Si-Zhu Liu, and Zhi-Guang Wu, sweeping, [2 females, 1 male on slides]. All deposited in NEFU.

Diagnosis.

Female. Body black with all tibiae yellow; propodeum with median carina poorly defined, spiracle circular, partly exposed, and separated by about its diameter from metanotum; propodeum reticulation absent; MV 2.1-2.6 × as long as STV; SMV with two dorsal setae. Male. Antenna with plaque 0.67 × as long as scape. Forewing with costal cell 1.4 × as long as MV, MV 2.5 × as long as STV, SMV with two dorsal setae.

The new species belongs to the incertus -group ( Graham 1991). Among the species recorded from China, O. flavotibialis is similar to O. scaposus , but can be separated from the latter by the following combination of characteristics: propodeum with median carina poorly defined, (vs sharply defined), spiracle circular, partly exposed (vs suboval, fully exposed) and separated by about its diameter from metanotum (vs about 0.5 × its diameter); propodeum reticulation absent (vs present but very fine); MV 2.1-2.6 × as long as STV (vs 3.0-3.7 ×); SMV with two dorsal setae (vs usually with only one); tibiae completely yellow (vs mainly brown to blackish). The new species is also similar to the extralimital species O. incertus (see Graham 1991 for description), but can be separated from the latter by characteristics: POL 2.1-2.5 × OOL (vs 1.5-1.65 ×), OOL 1.5-1.8 × OD (vs 2.3-2.5 ×); propodeum medially distinctly longer than dorsellum (vs hardly longer than).

Description.

Female. Body length 1.0-1.2 mm (1.1 mm), black with dark-green metallic reflection. Antenna with radicle dark brown, scape mostly yellow, brown along dorsal edge, pedicel with dorsal half brown, ventral half yellow, flagellum yellowish brown. Metasoma oval, smooth, with weak bronze and bluish tint like mesosoma. Wings hyaline, venation yellowish brown. Legs with coxae dark brown, trochanters yellowish brown; basal 2/3 of pro- and metafemora brown with distal 1/3 yellow, a little more than half of mesofemora yellowish brown basally, remaining distal part yellow; tibiae and basal three tarsomeres yellow, last tarsomeres brown to dark brown.

Head (Fig. 1 ) in dorsal view, slightly broader than mesosoma with slightly raised reticulation, 3.0-3.4 × (3.2 ×) as broad as long; POL 2.1-2.5 × (2.2 ×) OOL, OOL 1.5-1.8 × (1.8 ×) OD. Malar space 0.53 × as long as eye, malar sulcus straight; mouth cavity 1.45 × as wide as malar space. Clypeus with anterior margin weakly bidentate. Facial depression moderate, with weak but slightly raised reticulation. Vertex with setae slightly shorter than OD. Torulus with lower edge a little below the ventral edge of eyes. Antenna (Fig. 2 ) with scape 3.8 × as long as broad, shorter than an eye length and not reaching vertex; pedicel longer than F1, 1.7-2.0 × (1.9 ×) as long as broad; three anelli; F1-F3 1.1-1.3 × (1.2 ×), 1.0-1.2 × (1.2 ×), and 1.0-1.2 × (1.2 ×) as long as broad respectively; clava broader than F3, 2.0-2.7 × (2.7 ×) as long as broad, longer than F2 and F3 combined, sensilla moderately numerous, relatively long.

Mesosoma (Fig. 3 ) 1.3-1.7 × (1.4 ×) as long as broad. Pronotum short, arched. Mid-lobe of mesoscutum 1.2 × as broad as long, without median line, with two or three adnotaular setae on each side in one row. Scutellum 1.2 × as broad as long; anterior pair of setae in middle, submedian grooves and sublateral grooves distinct, distance between submedian grooves equal to submedian grooves to sublateral grooves. Mesoscutum with extremely fine reticulation, scutellum with similar but finer sculpture. Dorsellum about 2.5 × as broad as long. Propodeum medially distinctly longer than dorsellum, smooth and reticulation absent; median carina poorly defined, not distinct; without plicae or traces of plicae at hind margin; spiracle circular, moderate in size and partly exposed, separated from metanotum by about its diameter; callus with four or five setae arranged irregularly. Forewing (Fig. 4 ) 2.0-2.1 × (2.1 ×) as long as broad, with costal cell 1.1-1.5 × (1.5 ×) as long as MV, MV 2.1-2.6 × (2.1 ×) as long as STV; SMV with two dorsal setae; speculum medium-sized, closed posteriorly. Hind wing (Fig. 4 ) 4.5-4.8 × (4.8 ×) as long as broad. Legs (Fig. 6 ) of medium length and thickness, meso- and metabasitarsus distinctly shorter than (0.6-0.7 ×) corresponding second tarsomeres.

Metasoma (Fig. 5 ) ovate, slightly depressed dorsally, as long as or slightly longer than mesosoma, 1.5-1.7 × (1.6 ×) as long as broad; cercal setae subequal in length. Ovipositor originated from about basal third of gaster, about 0.6 × as long as gaster and not exerted at apex, third valvula 0.22 × as long as second valvifer.

Male. Similar to female. Antenna (Fig. 7 ) with scape robust, shorter than an eye, 2.62 × as long as broad; plaque 0.67 × as long as scape; pedicel 1.71 × as long as broad; F1 quadrate, shorter than other funicular segments, F2-F4 similar in shape, 1.40 × as long as broad; clava broader than funicle, 2.74 × as long as broad. Forewing (Fig. 8 ) with costal cell 1.4 × as long as MV, MV 2.5 × as long as STV.

Host.

Unknown.

Distribution.

China (Liaoning, Shandong).

Etymology.

Flavus , Latin for yellow, golden; in reference to the completely yellow tibiae.

Figures

Figures 1 - 6. Oomyzus flavotibialis sp. nov. holotype, female 1 head, frontal view 2 antenna, lateral view 3 mesosoma, dorsal view 4 fore- and hind wings, dorsal view 5 metasoma, ventral view 6 legs, lateral view. Scale bars: 100 μm.

Figures 7, 8. Oomyzus flavotibialis sp. nov., paratype male 7 antenna, lateral view 8 forewing, dorsal view. Scale bars: 100 μm.