Chelonus (Microchelonus) linzhiensis Zhou & Achterberg & Tang & Chen 2024, sp. nov.
Creators: name: Zhou, Jin-Jin
name: Achterberg, Cornelis Van
name: Tang, Pu
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Chelonus
Chelonus linzhiensis

description: Chelonus (Microchelonus) linzhiensis sp. nov.
Figs 41–44
Material examined. Holotype: female, Linzhi, Xizang Prov., China, 2.VIII.2003, Dekyi Metok, No. 20034177 (ZJUH). Paratype: 1 male, same label data as holotype but No. 20035275.
Diagnosis. This new species is similar to C. (M.) pectinophorae (Cushman, 1931), sharing the metasomal carapace being widest after middle and almost 2.0 × longer than wide in dorsal view (Fig. 42E), and carapace distinctly widened posteriorly in lateral view (Fig. 42C), but the two species can be separated by the following characters: legs partly blackish (versus mainly yellow in C. (M.) pectinophorae); temples strongly narrowed behind eyes (Fig. 42G) (versus slightly narrowed to widened); face coarsely and irregularly punctate-rugose medially (Fig. 42F) (versus transversely punctate-rugose).
Description. Holotype, female, length of body 3.7 mm, of fore wing 2.6 mm.
Head. Head transverse, width of head 3.1 × its dorsal length, occiput strongly excavated; antennomeres 16, antenna filiform, not widened, length of 3 rd and penultimate antennomeres 2.7 × and 1.8 × their width, respectively (Fig. 42H); eye in dorsal view 0.8 × longer than temple; OOL: OD: POL=21: 7: 13; temple distinctly narrowed behind eyes (Fig. 42G); frons and vertex finely striate-rugulose (Fig. 42G); face flat, coarsely irregular punctate-rugose medially, width of face 1.7 × its height; eyes slightly converging ventrally; clypeus densely punctate, 2.0 × wider than high, apical margin truncate medially, shiny; distance between tentorial pits 1.6 × distance between pits and eyes; clypeus extending below or far below lower level of eyes (Fig. 42F).
Mesosoma. Length of mesosoma 1.5 × its height; side of pronotum finely punctate, mesopleuron densely setose (Fig. 42B); notauli distinct, mesoscutum coarsely reticulate-rugose; scutellum evenly convex, rugulose medially, rugose laterally; scutellar suture comparatively deep, narrow, with carinae; propodeum coarsely rugose, lateral tubercles rather small (Fig. 424C).
Wings. Vein r straight; marginal cell 0.8 × as long as pterostigma; pterostigma 3.2 × longer than wide; r: 3-SR: SR1=14: 17: 45; SR1 curved towards pterostigma; marginal cell 1.2 × longer than second submarginal cell; 1-CU1: 2-CU1=18: 29; 2-R1 short (Fig. 42A).
Legs. Hind coxa densely setose laterally, mainly smooth and shiny; length of hind femur and tibia 3.3 × and 5.0 × their maximum width, respectively; length of inner hind tibial spur 0.5 × hind basitarsus.
Metasoma. Length of carapace 1.9 × its maximum width in dorsal view, widest after middle, apically slightly narrowed; carapace rugose-reticulate, longitudinal elements less clear, but visible up to middle, rugose apically (Fig. 42E); carapace in lateral view 2.3 × longer than high, posterior height of metasoma 1.9 × its anterior height, posteriorly rounded, carapace apically distinctly incurved (Fig. 42D).
Colour. Body black; antenna black; palpi light brown; pterostigma dark brown; middle of wing and its veins dark brown, wing base and its veins light yellowish; legs partly black but hind tibia with wide pale yellowish ring; carapace with 2 large pale yellowish spots in basal 1/3, almost connected medially.
Male. Antennomeres 25, antenna filiform, not widened medially (Fig. 44I); apical aperture in posterior view small, oval and median process of aperture horizontal oval (Fig. 44F); other characters as in female.
Biology. Unknown.
Distribution. China (Xizang).
Etymology. Named after its type locality, a city in the southeast of Xizang (Tibet).
description: Published as part of Zhou, Jin-Jin, Achterberg, Cornelis Van, Tang, Pu & Chen, Xue-Xin, 2024, A review of the subgenera Carinichelonus, Microchelonus, Parachelonus and Stylochelonus of the genus Chelonus Panzer (Braconidae: Cheloninae) with descriptions of twenty-one new species from China, pp. 1-127 in Zootaxa 5412 (1) on pages 53-55, DOI: 10.11646/zootaxa.5412.1.1, http://zenodo.org/record/10675974