Brachynervus beijingensis Wang, 1983

Choi, Jin-Kyung, 2024, Taxonomic study of the genus Brachynervus Uchida (Hymenoptera: Ichneumonidae: Anomaloninae) from South Korea, Journal of Species Research 13 (2), pp. 131-135 : 132-133

Brachynervus beijingensis Wang, 1983 ( Figs. 1 & 2 ) ǬflĝêƎḏḡḣşffinjḍ (ṳḑ)

Brachynervus beijingensis Wang, 1983: 196 - 197 . Type: female. Type depository: ASIZ.

Diagnosis. Male. Color. Generally black and reddish brown ( Fig. 1 ). Face, anterior half of temple and malar space yellow ( Fig. 2A ), mandible yellow except apical part black, basal area of mandible dark brown; frons black, with yellow triangular spots on behind eyes. Antennal scape yellow, flagellomeres yellow to brown. Mesosoma black, with yellow spot on the sternaulus area ( Fig. 2C ). Tegular and scutellum reddish brown ( Fig. 2D ). Fore and mid legs yellow; hind leg brown, tarsus yellow. Metasoma brown to reddish brown.

Head: Face reticulated; inner orbits of eyes convergent toward below; frons with median longitudinal horn; distance of between lateral ocelli 0.79 times as long as the distance of between lateral ocellus and eye; diameter of lateral ocellus 1.57 times as long as the distance of between lateral ocelli; clypeus separated from face by a distinct deep groove ( Fig. 2A ). Mandible bidentate and twisted, lower tooth slightly shorter than upper tooth. Malar space long, 1.38 times as long as basal mandibular width. Occipital carina incomplete, occiput polished, middle of occiput with transverse carinae.

Mesosoma: Pronotum reticulate, with transverse striae on the ventral area. Mesoscutum reticulate, with weak notaulus line, median lob of between notauli with transverse striae. Propodeum reticulate, short and thick ( Fig. 2D ), without pleural carina and postpectal carina ( Fig. 2F ). Hind tarsomeres 30: 16: 9: 5: 7; tarsal claws simple and strongly curved. M&Rs (basal vein) opposite to 1Cu-a (nervulus); vein 2rs-m of fore wing far (approximately 6.0 times as long as 2rs-m) basad of 2m-cu; areolet absent ( Fig. 2E ).

Metasoma: Metasomal tergites compressed.

Material examined. [ South Korea] 1♀, Gyeonggi-do, Namyangju-si , Wabu-eup , Dogok-ro, Korea Univ., Deokso Farm, 15 - 27.viii.2011, J.W. Lee ( DNUE _ IIEI) ; 1♂, Gyeongsangnam-do, Hapcheon-gun , Gahye-ri, 17. viii.1986, J.Y. Cha ( DNUE _ IIEI) ; 1♀, Gyeongsangbukdo , Pohang-si , Jukjang-ri, Haok valley, Malaise trap, 2.ix. 2004, M.G. Baek ( NNIBR) .

Distribution. South Korea (new record), China.

Region. Eastern Palaearctic.

Figures

Fig. 1. Habitus in lateral view of Brachynervus beijingensis Wang, 1983. Scale bar: 2 mm.

Fig. 2. Brachynervus beijingensis Wang, 1983. A. Head in frontal view (male); B. Head in frontal view (female); C. Head and mesosoma in lateral view; D. Head and mesosoma in dorsal view; E. Wings; F. Mesosoma in ventral view. Scale bars: A, B, 0.5 mm; C, D, F, 1 mm; E, 2 mm.