Blacus (Ganychorus) ejuncidus Lu, Chai, Achterberg, Tang & Chen, 2025, sp. nov.
Creators: name: Lu, Qian-Yu
name: Chai, Hong-Fei
name: Achterberg, Cornelis Van
name: Tang, Pu
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Blacus
Blacus ejuncidus

description: Blacus (Ganychorus) ejuncidus sp. nov.
(Figs 11–12)
Material examined. Holotype: ♀, China, Yunnan, Bao Mtn, Lujiangba, Nankang, 14.V.2009, Wang Manman, No. 200904587 (ZJUH). Paratype: 1♀, China, Yunnan, Bao Mtn, Lujiangba, Nankang, 9.V.2009, Wang Manman, No. 200902643 (ZJUH).
Diagnosis. The new species is similar to B. (G.) tenuipes van Achterberg, 1988 because the ♀ -antenna has 20 antennomeres, second tergite smooth, precoxal sulcus striate-rugose, propodeal tubercles absent, propodeum without areola, length of ovipositor sheath 0.21 × length of fore wing, but differs by having more slender hind femur (more robust in B. (G.) tenuipes), vein r of fore wing oblique (normal), first discal cell of fore wing widely truncate anteriorly (narrowly truncate), malar suture absent (deep), length of first metasomal tergite 2.5 × its apical width, slightly widened apically (1.6 × and nearly parallel-sided), distinctly spaced rugose between dorsal carinae (only some slightly rugose).
Description. Female. Length of body 1.9 mm, length of fore wing 1.9 mm.
Head. Antennomeres 20, short densely setose (Fig. 12C); length of first flagellomere 1.6 × length of second flagellomere; length of first, second and penultimate flagellomere 4.7, 3.0 and 1.5 × their width, respectively; length of maxillary palp equal to height of head; occipital carina complete; frons smooth and sparsely setose, frontal suture present; OOL: OD: POL = 7: 3: 4; length of eye in dorsal view 0.9 × length of temple; face smooth; malar suture absent, length of malar space 2.0 × basal width of mandible.
Mesosoma. Length of mesosoma 1.4 × its height; side of pronotum rugose ventrally and smooth dorsally; precoxal sulcus striate-rugose (Fig. 12F); notauli narrow and spaced crenulate (Fig. 12D); mesoscutal lobes glabrous anteriorly, sparsely setose posteriorly; scutellum smooth, protruding dorsally; propodeal tubercles absent; surface of propodeum largely smooth between carinae, medial area absent (Fig. 12E).
Wings. Fore wing: first discal cell widely truncate anteriorly; 1-CU1: 2-CU1 = 1: 2 (Fig. 12G).
Legs. Hind coxa with some dorsal rugae; length of femur, tibia and basitarsus of hind leg 7.5, 12.9 and 9.2 × their width, respectively; fore claws with blackish bristles; middle claws with inconspicuous blackish bristles (Fig. 12J); hind claws simple.
Metasoma. Length of first tergite 2.5 × its apical width, slightly widened apically, distinctly spaced rugose between dorsal carinae (Fig. 12E); second tergite smooth (Fig. 12E); length of ovipositor sheath 0.21 × length of fore wing.
Colour. Reddish brown; 4 apical antennomeres dark, remainder of antennomeres, clypeus, mandible, palpi and all legs (but telotarsi brown) yellow; basal half of metasoma (except first tergite) pale brown; apical half of metasoma, tegulae, pterostigma, parastigma, veins, ovipositor and sheath yellowish brown; wing membrane infuscated.
Variation. Length of first tergite 2.5–2.6 × its apical width.
Male. Unknown.
Biology. Unknown.
Distribution. China (Yunnan).
Etymology. The specific name “ ejuncidus ” is Latin for slender and refers to the slender first tergite.
description: Published as part of Lu, Qian-Yu, Chai, Hong-Fei, Achterberg, Cornelis Van, Tang, Pu & Chen, Xue-Xin, 2025, The first review of the subgenus Ganychorus Haliday, 1835 (Hymenoptera, Braconidae, Brachistinae) in China, pp. 201-250 in Zootaxa 5575 (2) on pages 215-217, DOI: 10.11646/zootaxa.5575.2.1, http://zenodo.org/record/14746703