Blacus (Ganychorus) isoruficornis, 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 : 220-221

Blacus (Ganychorus) isoruficornis sp. nov.

( Figs 15–16 )

Material examined. Holotype: ♀, China, Ningxia, Jingyuan, Liupan Mtn, Hongxia Tree Farm , 2.VII.2008, Liu Jingxian, No. 200902300 ( ZJUH) . Paratypes: 7♀♀, China, Ningxia, Jingyuan, Liupan Mtn, Hongxia Tree Farm , 2.VII.2008, Liu Jingxian, Nos. 200902310, 200902328; Hongxia Tree Farm , alt. 1900m, 1.VII.2008, Liu Jingxian, Nos. 200902106, 200902110; Liupan Mtn, Qiuqianjia , 7.VII.2008, Liu Jingxian, No. 200902205; Liupan Mtn, Longtan Tree Farm , 5–6.VII.2008, Liu Jingxian, No. 200902171; Liupan Mtn, Heshangfu Tree Farm , alt. 2000m, 25.VI.2008, Liu Jingxian, No. 200902242 ; 1♀, China, Hunan, Shimen, Huping Mtn, main Peak , 2.VII.2009, Tang Pu, No. 200903018 ( ZJUH) .

Diagnosis. The new species is similar to B. (G.) ruficornis (Nees, 1811) because the ♀ -antenna has 20 antennomeres, first metasomal tergite robust, length of eye in dorsal view about equal to length of temple, precoxal sulcus wide and striate-rugose, frontal suture present, first discal cell of fore wing narrowly truncate, body reddishbrown, fore and middle claws with blackish bristles, hind claws with small and brownish bristles, length of ovipositor sheath approx. 0.20 × length of fore wing, propodeal tubercles absent, and propodeum without areola, but differs by having wide and smooth notauli (narrow, anteriorly crenulate, posteriorly rugose in B. (G.) ruficornis ), length of malar space 2.0 × basal width of mandible (slightly longer), occipital carina narrow and weakly crenulate (wide and distinctly crenulate), and side of pronotum smooth dorsally (reticulate-rugose).

Description. Female. Length of body 3.3 mm, length of fore wing 2.7 mm.

Head. Antennomeres 20 ( Fig. 16C ); length of first flagellomere 1.4 × length of second flagellomere; length of first, second and penultimate flagellomere 5.5, 4.0 and 2.0 × their width, respectively; length of maxillary palp approx. 1.1 × height of head; occipital carina complete, narrow and weakly crenulate; frons smooth and sparsely setose, frons suture distinctly present; OOL: OD: POL = 11: 4: 7; length of eye in dorsal view 1.0 × length of temple; face weakly rugose; malar suture absent, length of malar space 2.0 × basal width of mandible.

Mesosoma. Length of mesosoma 1.5 × its height; side of pronotum smooth dorsally, rugose ventrally; mesopleuron (except precoxal sulcus) weakly rugose, with indistinct striae; precoxal sulcus wide and striate-rugose; notauli wide and smooth, widened posteriorly ( Fig. 16F ); mesoscutal lobes sparsely setose, near notauli setose; scutellum more or less rugose, slightly protruding dorsally; propodeal tubercles absent; propodeum with rugae near carinae, medial area absent ( Fig. 16E ).

Wings. Fore wing: first discal cell narrowly truncate anteriorly; 1-CU1: 2-CU1 = 9: 22 ( Fig. 16G ).

Legs. Hind coxa rugose dorsally; length of femur, tibia and basitarsus of hind leg 6.5, 11.25 and 8.25 × their width, respectively; fore and middle claws with blackish bristles, hind claws with small and brownish bristles.

Metasoma. Length of first tergite 1.5 × its apical width, distinctly widened apically, robust, longitudinally rugose ( Fig. 16E ); second tergite smooth; length of ovipositor sheath 0.21 × length of fore wing.

Colour. Reddish brown; antenna yellow, gradually darkened towards apex; clypeus, palpi, mandible, tegulae and all legs (but telotarsi brown) yellow; pronotum and mesonotum yellowish brown; pterostigma and veins brown; parastigma whitish or pale yellowish; wing membrane infuscated.

Variation. Body reddish or yellowish brown.

Male. Unknown.

Biology. Unknown.

Distribution. China (Ningxia, Hunan).

Etymology. The specific name isoruficornis refers to the high similarity between the new species and B. (G.) ruficornis ; “ iso- ” stands for like.

Figures

FIGURE 15. Ganychorus isoruficornis sp. nov. (body, lateral aspect).

FIGURE 16. Ganychorus isoruficornis sp. nov. A. head, dorsal aspect; B. head, anterior aspect; C. antenna; D. mesosoma, lateral aspect; E. propodeum and metasoma, dorsal aspect; F. mesosoma, dorsal aspect; G. fore wing; H. middle claw and hind leg; I. ovipositor and ovipositor sheath.