Chelonus (Microchelonus) crassitibialis, 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 : 33-35

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.10676028
persistent identifier	https://treatment.plazi.org/id/2B5587AD-F02E-735B-FF39-6D70FB3EBCDB
treatment provided by	Plazi
scientific name	Chelonus (Microchelonus) crassitibialis
status	sp. nov.

Treatment

Chelonus (Microchelonus) crassitibialis sp. nov.

Figs 23–26 View FIGURE 23 View FIGURE 24 View FIGURE 25 View FIGURE 26

Material examined. Holotype: female, Chebaling , Guangdong Prov., China, 21.VIII.2003, Zaifu Xu, No. 20047938 ( ZJUH) . Paratypes: 1 male, same label data as holotype but No. 20047943 ; 3 females, same label data as holotype but Nos. 20047935, 20047943, 20047875 .

Diagnosis. This new species is similar to C. (M.) flagellaris (Tobias, 1989) , considering metasomal carapace posteriorly gradually widened and rather truncate in lateral view and apex of carapace distinctly incurved in lateral view ( Fig. 24D View FIGURE 24 ), but both species can be separated by the following characters: carapace widest at middle in dorsal view ( Fig. 24E View FIGURE 24 ) (versus tapering towards base in C. (M.) flagellaris ); clypeus extending above lower level of eyes ( Fig. 24F View FIGURE 24 ) (versus below lower level of eyes); apical antennomere 2.4 × longer than wide ( Fig. 24H View FIGURE 24 ) (versus 4.8 × longer than wide).

Description. Holotype, female, length of body 3.5 mm, of fore wing 2.7 mm.

Head. Head transverse, width of head 2.3 × its dorsal length, occiput slightly excavated; antennomeres 16, antenna filiform, not widened; length of 3 rd and penultimate antennomeres 4.0 × and 1.3 × their width, respectively; eye 1.6 × as long as temple in dorsal view; OOL: OD: POL=18: 8: 11; temple narrowed behind eyes, vertex and frons finely striate-rugose ( Fig. 24G View FIGURE 24 ); face flat, coarsely transverse-longitudinally punctate-rugose, width of face 1.5 × its height; eyes slightly converging ventrally; clypeus sparsely punctate, shiny, 2.2 × wider than high, distance between tentorial pits 1.6 × distance between pits and eyes ( Fig. 24F View FIGURE 24 ).

Mesosoma. Length of mesosoma 1.5 × its height; side of pronotum and mesopleuron finely reticulate-rugose ( Fig. 24B View FIGURE 24 ); notauli slightly developed, anterior part of mesoscutum dense punctulate and posterior part coarsely reticulate-rugose; scutellum reticulate-rugose; scutellar suture comparatively deep and wide, with carinae; propodeum coarsely rugose, lateral tubercles small and weak ( Fig. 24C View FIGURE 24 ).

Wings. Vein r somewhat arched; marginal cell 0.9 × as long as pterostigma; 2-R1 short; r: 3-SR: SR1=13: 13: 53; SR1 straight; marginal cell 1.8 × longer than second submarginal cell; 1-CU1: 2-CU1=13: 33, 2-R1 short ( Fig. 24A View FIGURE 24 ).

Legs. Hind coxa punctate; length of hind femur, tibia and basitarsus 3.2 ×, 3.6 × and 3.4 × their maximum width, respectively; length of inner hind tibial spur 0.5 × hind basitarsus.

Metasoma. Length of carapace 2.2 × its maximum width in dorsal view, widest at middle, apically rounded; carapace striate-rugose up to basal 80% and apically rugulose ( Fig. 24D View FIGURE 24 ); carapace in lateral view 3.1 × longer than its maximum height, posteriorly rather truncate, posterior height of metasoma 2.0 × its anterior height ( Fig. 24D View FIGURE 24 ); apex of metasomal carapace distinctly incurved.

Colour. Body black; antenna dark brown; palpi light yellow; pterostigma brown; parastigma yellowish; wing and its veins medium dark brown; hind femur entirely black, hind tibia with pale ring ( Fig. 23 View FIGURE 23 ); basal third of carapace with yellowish band.

Male. Antennomeres 25, antenna filiform, not widened medially ( Fig. 26I View FIGURE 26 ); temple parallel-sided behind eyes ( Fig. 26H View FIGURE 26 ); apical margin of clypeus slightly excised, sinuate ( Fig. 26G View FIGURE 26 ); metasomal carapace widest after middle in dorsal view, and with one medial yellow spot ( Fig. 26E View FIGURE 26 ); apical aperture in posterior view large, elongate, slit-shaped and median process of aperture horizontal and oval ( Fig. 26F View FIGURE 26 ); other characters as in female ( Fig. 25 View FIGURE 25 ).