Chelonus (Microchelonus) clivus 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 clivus

description: Chelonus (Microchelonus) clivus sp. nov.
Figs 19–22
Material examined. Holotype:female, Zhenzhou, Henan Prov., China, 1982, Yan Li, No. 827051 (ZJUH). Paratypes: 4 males and 2 females, same label data as holotype; 3 females, Taigu, Shanxi Prov., China, 19??, Nos. 803472 (3).
Diagnosis. The new species is similar to C. (M.) moczari (Papp, 2014), considering the moderate maximum height of metasomal carapace in lateral view and posteriorly rather truncate and declivous in lateral view (Fig. 20D), but the two species can be separated by the following characters: metasomal carapace narrowed to apex in dorsal view (Fig. 20E) (versus widest after middle in C. (M.) moczari); marginal cell 0.9 × as long as pterostigma (Fig. 20A) (versus 0.5 × as long as pterostigma); carapace with a large yellowish spot medio-basally (Fig. 20E) (versus entirely blackish).
Description. Holotype, female, length of body 3.3 mm, of fore wing 2.4 mm.
Head. Head transverse, width of head 2.5 × its dorsal length; occiput excavated; antennomeres 16, antenna slightly widened medially, length of 3 rd and penultimate antennomeres 3.3 × and 1.0 × their width, respectively (Fig. 20H); eye 1.5 × longer than temple in dorsal view; OOL: OD: POL=20: 6: 13; temple slightly narrowed posteriorly; vertex striate-rugose; frons distinctly concave, smooth near antennal sockets (Fig. 20G); face flat, transverse-longitudinally striate-rugose, width of face 1.8 × its height; eyes about parallel; clypeus sparsely punctate, shiny, 1.9 × wider than high, distance between tentorial pits 1.7 × distance between pits and eyes (Fig. 20F).
Mesosoma. Length of mesosoma 1.4 × its height; side of pronotum finely punctate, mesopleuron areolate-rugose (Fig. 20B); scutellum slightly convex, dense punctulate medially, rugose at margin; scutellar suture comparatively deep, narrow, with carinae; propodeum coarsely rugose, lateral tubercles distinct (Fig. 20C).
Wings. Vein r straight; marginal cell 0.9 × as long as pterostigma; pterostigma 2.8 × longer than wide; r: 3-SR: SR1=12: 12: 53; SR1 straight; marginal cell 2.0 × longer than second submarginal cell; 1-CU1: 2-CU1=10: 27, 2- R1 absent (Fig. 20A).
Legs. Hind coxa punctate laterally; length of hind femur and tibia 3.0 × and 4.3 × 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, narrowed from base to apex; base of carapace striate-rugose up to middle and posteriorly coriaceous (Fig. 20E); carapace in lateral view 2.5 × longer than high, its maximum height moderate, posteriorly rather truncate and declivous, posterior height of metasoma 1.9 × its anterior height; apically carapace slightly incurved (Fig. 20D).
Colour. Body black; antenna brown but scapus yellowish; palpi light brown; pterostigma and parastigma brown, middle of wing and its veins medium light brown, wing base and its veins light yellowish; legs almost entirely yellowish brown but apex of tibia dark brown; carapace with a large yellow spot medio-basally.
Male. Antennomeres 23, antenna filiform, not widened medially (Fig. 22J); metasomal carapace tapering towards base in dorsal view (Fig. 22E), distinctly incurved in lateral view (Fig. 22D); apical aperture in posterior view oval and median process of aperture horizontal, nearly round (Fig. 22F); other characters as in female (Fig. 21).
Biology. Unknown.
Distribution. China (Henan, Shanxi).
Etymology. Named after the posteriorly rather truncate and declivous carapace: “ clivus ” is Latin for sloping.
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 29-33, DOI: 10.11646/zootaxa.5412.1.1, http://zenodo.org/record/10675974