Eubroncus vertexus Jin & Li

Jin, Xiang-Xiang & Li, Cheng-De, 2014, First record of Eubroncus (Hymenoptera, Mymaridae) from China, with description of three new species, ZooKeys 399, pp. 29-41 : 36-39

Eubroncus vertexus Jin & Li sp. n. Figs 20-31

Holotype.

♀ China, Yunnan Province, Baoshan City, Tengchong County, Laifengshan National Forest Park, 16-19.VII. 2012, Xiang-Xiang Jin, Hui-Lin Han, Hui Geng, Chao Zhang (NEFU), YPT.

Paratypes.

CHINA. Yunnan Province. Longchuan County, Zhangfeng Town, 26-27.IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang (3♀♀, NEFU), YPT; Lincang City, Yongde County, Yongkang Town, 23-24. IV.2013, Xiang-Xiang Jin, Hui-Lin Han, Guo-Hao Zu, Chao Zhang (1♀, 2♂♂, NEFU), YPT.

Diagnosis.

Vertex entirely covered with conspicuous scale-like sculpture; pronotum with a faint longitudinal carina medially; propodeum with strong reticulate sculpture medially, less conspicuous laterally; hind wing with 3-6 long setae and 1 short seta on marginal vein, disc uniformly setose; petiole with relatively short spine-like projections anterolaterally; ovipositor 0.87 –0.90× as long as mesotibia.

Description. Female. Body length 0.9-1.1 mm. Head black with ocelli and mandibles brown and eyes pinkish. Antenna dark brown with radicle yellowish-brown. Mesosoma black with pronotum dark brown. Wings infuscate, with base of forewing under the venation dark brown, and two transparent spots, one on the behind the api cal part of submarginal vein and the other on base of marginal vein. Legs brown except protibial spur, trochanters, basal three tarsal segments light brown. Metasoma brown with ovipositor light brown.

Head (Fig. 20) 1.1 × as long as wide. Eye subtriangular, 1.8 –2.0× as long as wide, finely setose, each seta about as long as the diameter of a facet. Vertex about as long as wide, with conspicuous scale-like sculpture entirely, its posterior margin 1.6 –1.7× as long as anterior margin. Ocelli in an obtuse triangle; mid ocellus oval, MOL shorter than OD; post ocellus oval, OCL approximately a little shorter than POD; POL about 3.4 –4.0× as long as OOL. Mandible (Fig. 21) 0.6 × as long as head and 0.8 × as long as vertex in dorsal view. Antenna (Fig. 22) with radicle 0.15 –0.25× as long as scape; scape 4.5 –5.3× as long as wide; pedicel 1.4 –1.7× as long as wide, and 2.4 –2.7× as long as fl1; fl2-fl6 each with 2 mps; clava shorter than scape, 2.4 –2.7× as long as wide, with 8 mps.

Mesosoma (Fig. 23) 1.5 –2.0× as long as wide. Pronotum (Fig. 20) 0.5 × as long as wide, with a faint longitudinal carina medially, each lobe with about 18-22 setae dorsally. Propleuron with reticulate sculpture. Prepectus with strong reticulate sculpture. Mesoscutum 0.8 × as long as pronotum. Scutellum about 1.0 –1.1× as long as mesoscutum, with short transverse row of fovea medially, distance between placoid sensilla 1.6 × as long as their own diameter. Propodeum 0.83 –0.97× as long as mesoscutum, and 0.86 –0.93× as long as scutellum, with strong reticulate sculpture medially, less conspicuous laterally, with one pair of tooth-like projections posterolaterally and 2-4 fine setae.

Forewing (Fig. 24) 3.55 –3.85× as long as wide, longest marginal setae about 0.25 × as long as greatest wing width. Beneath or on the submarginal vein with 6-8 setae. Marginal vein with 6-8 setae along anterior margin. Hind wing (Fig. 25) 7.5 –8.4× as long as wide, longest marginal setae about 0.8 –1.2× as long as greatest wing width, with 3-6 long setae and 1 short seta on marginal vein; disc uniformly setose, without a group of long setae behind the distal part of marginal vein.

Petiole (Fig. 27) 1.25 –1.45× as long as wide, with relatively short spine-like projections anterolaterally. Gaster oblong, 0.86 –1.05× as long as mesosoma; Gt1 and Gs1 with numerous prominent and sclerotized carinae. Ovipositor not or only slightly exserted; 0.87 –0.90× as long as mesotibia (Fig. 26).

Measurements (length/width, mm): head 0.20 –0.30/0.20– 0.26, scape 0.173 –0.228/0.038– 0.055, pedicel 0.046 –0.060/0.034– 0.036, fl1 0.022 –0.034/0.024– 0.036, fl2 0.022 –0.034/0.034– 0.043, fl3 0.019 –0.034/0.036– 0.043, fl4 0.019 –0.024/0.038– 0.043, fl5 0.019 –0.024/0.038– 0.046, fl6 0.019 –0.026/0.038– 0.048, clava 0.156 –0.206/0.050– 0.091, forewing 0.98 –1.00/0.19– 0.26, longest marginal setae 0.055-0.063, hind wing 0.67 –0.93/0.12– 0.14, longest marginal setae 0.087-0.098, ovipositor 0.14-0.19.

Relative measurements. OD 12-18, OCL 6-10, OOL 16-20, POL 64-74, LOL 28-30, POD 14-18.

Male. Body length 1.1 mm. Similar to female except for normal sexually dimorphic characters and the following. Head (Fig. 28) about 0.91 × as long as wide. POL about 5.4 × as long as OOL. Antenna (Fig. 29) with all the flagellar segments longer than wide, each with several mps. Distance between placoid sensilla 2.0 –2.4× as long as their own diameter. Forewing (Fig. 30) relatively wider than in female, 3.29 –3.31× as long as wide. Hind wing (Fig. 30) 7.60 –7.68× as long as wide. Genitalia (Fig. 31) simple, phallobase without parameres.

Measurements (length/width, mm): head 0.30/0.33, scape 0.228 –0.235/0.048– 0.058, pedicel 0.046 –0.060/0.034– 0.036, fl1 0.070 –0.084/0.036– 0.041, fl2 0.077 –0.084/0.036– 0.041, fl3 0.082 –0.084/0.036– 0.041, fl4 0.079 –0.082/0.036– 0.041, fl5 0.079 –0.084/0.036– 0.041, fl6 0.082 –0.084/0.036– 0.041, fl7 0.084 –0.086/0.036– 0.041, fl8 0.084/0.036-0.041, fl9 0.086/0.036-0.041, fl10 0.089 –0.094/0.036– 0.041, fl11 0.089 –0.096/0.036– 0.041, forewing 1.22 –1.24/0.37– 0.38, hind wing 1.10 –1.17/0.14– 0.15, genitalia 0.12-0.14.

Relative measurements. OD 24, OCL 6, OOL 14, POL 76, LOL 30, POD 26.

Etymology.

The specific name refers to the vertex entirely covered with conspicuous scale-like sculpture.