Blacus (Ganychorus) ejuncidus, Lu & Chai & Achterberg & Tang & Chen, 2025

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, Zootaxa 5575 (2), pp. 201-250 : 215-217

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.

Figures

FIGURE 11. Ganychorus ejuncidus sp. nov. (body, lateral aspect).

FIGURE 12. Ganychorus ejuncidus sp. nov. A. head, dorsal aspect; B. head, anterior aspect; C. antenna; D. mesosoma, dorsal aspect; E. propodeum and metasoma, dorsal aspect; F. mesosoma, lateral aspect; G. wings; H. ovipositor and ovipositor sheath; I. hind leg; J. middle claw.