Chelonus (Microchelonus) clivus, Zhou & Achterberg & Tang & Chen, 2024

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, Zootaxa 5412 (1), pp. 1-127 : 29-33

publication ID	https://doi.org/ 10.11646/zootaxa.5412.1.1
publication LSID	lsid:zoobank.org:pub:DB6DD20F-6EB7-4152-AC80-2F67EE06684B
DOI	https://doi.org/10.5281/zenodo.10676024
persistent identifier	https://treatment.plazi.org/id/2B5587AD-F012-7359-FF39-6E7BFA59BBD4
treatment provided by	Plazi
scientific name	Chelonus (Microchelonus) clivus
status	sp. nov.

Treatment

Chelonus (Microchelonus) clivus sp. nov.

Figs 19–22 View FIGURE 19 View FIGURE 20 View FIGURE 21 View FIGURE 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 View FIGURE 20 ), but the two species can be separated by the following characters: metasomal carapace narrowed to apex in dorsal view ( Fig. 20E View FIGURE 20 ) (versus widest after middle in C. (M.) moczari ); marginal cell 0.9 × as long as pterostigma ( Fig. 20A View FIGURE 20 ) (versus 0.5 × as long as pterostigma); carapace with a large yellowish spot medio-basally ( Fig. 20E View FIGURE 20 ) (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 View FIGURE 20 ); 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 View FIGURE 20 ); 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 View FIGURE 20 ).

Mesosoma. Length of mesosoma 1.4 × its height; side of pronotum finely punctate, mesopleuron areolate-rugose ( Fig. 20B View FIGURE 20 ); scutellum slightly convex, dense punctulate medially, rugose at margin; scutellar suture comparatively deep, narrow, with carinae; propodeum coarsely rugose, lateral tubercles distinct ( Fig. 20C View FIGURE 20 ).

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 View FIGURE 20 ).

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 View FIGURE 20 ); 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 View FIGURE 20 ).

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 View FIGURE 22 ); metasomal carapace tapering towards base in dorsal view ( Fig. 22E View FIGURE 22 ), distinctly incurved in lateral view ( Fig. 22D View FIGURE 22 ); apical aperture in posterior view oval and median process of aperture horizontal, nearly round ( Fig. 22F View FIGURE 22 ); other characters as in female ( Fig. 21 View FIGURE 21 ).

Biology. Unknown.

Distribution. China (Henan, Shanxi).

Etymology. Named after the posteriorly rather truncate and declivous carapace: “ clivus ” is Latin for sloping.