Centrodora pellucida Li & Chen

Chen, Ye & Li, Cheng-De, 2017, Two new species of Centrodora (Hymenoptera, Aphelinidae) from China, with a key to Chinese species, ZooKeys 687, pp. 53-61 : 56-59

Centrodora pellucida Li & Chen sp. n. Figs 12-19

Type material.

Holotype: female [on slide, NEFU], CHINA, Heilongjiang Province, Shangzhi City, laoyeling (45°24.71'N, 127°40.41'E), 8-18.VII.2013, Cheng-de Li, Ye Chen, Chao Zhang, MT. Paratype: 1 female [on slide, NEFU], CHINA, Shandong Province, Qingdao City, xiaozhu Mountain (35°58.38'N, 120°05.76'E), 18-20.V.2014, Xiang-xiang Jin, Guo-hao Zu, Si-zhu Liu, yellow pan trapping.

Diagnosis.

Centrodora pellucida sp. n. can be easily distinguished from other species in this genus by the following combination of characters: upper half of head yellowish-brown; gaster dark brown; fore wing mostly infuscate and paler distally, with a wide transparent cross band on the median area of disc as in Fig. 16; F2 subquadrate, and ovipositor strongly exserted.

Description.

Female. Holotype [The colour of body faded during slide mounting, and the following descriptions of colour is based on alcohol-preserved specimens]. Length 0.95 mm. Head with frontovertex, upper face, and occiput above foramen yellowish brown; remainder of head brown. Eyes and ocelli yellowish-brown. Antenna brown. Mandible yellowish-brown, with apex dark brown. Mesosoma largely yellowish-brown, but with mesopleuron brown and with a pale yellow mid-longitudinal groove on median area of mesoscutum, mesoscutellum, metanotum, and propodeum. Fore wing mostly infuscate and paler distally, with a wide transparent cross band on the median area of disc as in Fig. 16. Hind wing faintly infuscate. Leg mostly brownish; mesocoxa paler; meso- and metafemur, both basal one third of meso- and metatibia dark brown. Metasoma mostly dark brown, with petiole and third valvula yellowish.

Head (Fig. 12), in frontal view, 0.77 × as high as wide; face and malar space finely reticulate. Frontovertex about 0.37 × head width, with numerous coarse and brown setae. Ocellar triangle with apical angle about 90°. Mandible with two teeth and a truncation. Antennae (Fig. 13) with scape 4.13 × as long as wide, about as long as clava; pedicel 2.0 × as long as wide, about as long as F3; F1 triangular, 1.64 × as long as wide, with ventral margin very slightly shorter than F2; F2 subquadrate, slightly shorter than half of F3; F3 2.12 × as long as wide, 0.44 × as long as clava; clava 4.0 × as long as wide, pointed and distinctly curved ventrally at apex. Measurements, length (width): scape, 124 (30); pedicel, 50 (25); F1, 23 (14); F2, 25 (23); F3, 53 (25); clava, 120 (30).

Mesosoma with fine, elongate reticulations on median area of mesoscutum and mesoscutellum (Figs 14, 15). Median area of mesoscutum 0.93 × as long as wide, 1.53 × as long as mesoscutellum, and with 10 setae; each lateral area of the mesoscutum and axilla with 2 and 1 setae respectively; mesoscutellum 0.73 × as long as wide, with 2 pairs of setae. Distance between anterior scutellar setae subequal to that between posterior pair. Placoid sensilla much closer to anterior pair of setae than to posterior pair. Fore wing (Fig. 16) 4.21 × as long as wide, marginal setae 0.22 × wing width. Costal cell slightly shorter than marginal vein, with 1 distal seta on dorsal surface; submarginal vein with 4 setae, marginal vein with 6 long setae along anterior margin, postmarginal vein 0.5 × as long as stigmal vein; basal cell without seta. Linea calva closed by a line of setae posteriorly. Hind wing (Fig. 17) 6.86 × as long as wide, marginal setae 0.67 × wing width. Mesotibial spur 0.87 × as long as corresponding basitarsus, and 0.83 × as long as the second tarsomere. Measurements, length (width): fore wing, 738 (175); costal cell, 160; marginal vein, 170; postmarginal vein, 10; stigmal vein, 20; marginal setae, 38.5; hind wing, 600 (87.5); marginal setae, 59; mesotibia, 250; mesotibial spur, 65; mesobasitarsus, 75.

Metasoma (Fig. 19) about 1.4 × as long as mesosoma. Ovipositor 2.45 × as long as mesotibia and strongly exserted, with the exserted part 0.35 × as long as ovipositor. Third valvula 3.07 × as long as mid basitarsus. Length measurements: ovipositor, 613; third valvula, 230.

Male. Unknown.

Remarks.

The new species is very close to C. amoena Förster 1878 in having similar colour of the body and strongly exserted ovipositor. But it can be separated from the latter by F1 with ventral margin very slightly shorter than F2 (vs obviously shorter, cf. Nikol’skaya and Yasnosh 1966, fig. 150), F2 subquadrate (vs about 1.8 × as long as wide), clava 4.0 × as long as wide (vs 3.5 ×), fore wing mostly infuscate, with a transparent cross band on the median area of disc (vs mostly hyaline with the area beneath marginal vein and stigmal vein infuscate).

Host.

Unknown.

Etymology.

The specific name refers to the fore wing with a wide transparent cross band on the median area of disc.

Distribution.

China (Heilongjiang, Shandong).