Chelonus (Microchelonus) platyetrus, 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 : 67-69

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.10676082
persistent identifier	https://treatment.plazi.org/id/2B5587AD-F04C-733D-FF39-6871FD39BD7E
treatment provided by	Plazi (2024-02-18 16:37:03, last updated 2024-11-28 20:39:31)
scientific name	Chelonus (Microchelonus) platyetrus
status	sp. nov.

Treatment

Chelonus (Microchelonus) platyetrus sp. nov.

Figs 61–64 View FIGURE 61 View FIGURE 62 View FIGURE 63 View FIGURE 64

Material examined. Holotype: female, Dalian , Liaoning Prov., China, 5.IV.1992, Juxian Lou, No. 976128 ( ZJUH) . Paratype: 1 male, same label data as holotype but No. 976267 .

Diagnosis. This new species is similar to C. (M.) fumipennis ( Tobias, 1986) , sharing the brown fore wing ( Fig. 62A View FIGURE 62 ), apical aperture of male in posterior view large, elongate and slit-shaped, and median process of aperture horizontal and oval ( Fig. 64F View FIGURE 64 ), but the two species can be separated by the following characters: 3 rd antennomere 4.7 × longer than wide (versus 2.5 × in C. (M.) fumipennis ), all legs dark black (versus fore and middle tibiae brownish yellow); lateral tubercles distinct and strong ( Fig. 64C View FIGURE 64 ) (versus small and weak).

Description. Holotype, female, length of body 3.3 mm, of fore wing 3.0 mm.

Head. Head transverse, width of head 2.4 × its dorsal length, occiput excavated; antennomeres 16, antenna slightly widened medially, length of 3 rd and penultimate antennomeres 4.7 × and 1.3 × their width, respectively ( Fig. 62H View FIGURE 62 ); eye in dorsal view 1.2 × as long as temple; OOL: OD: POL=18: 8: 13; temple parallel-sided behind eyes; frons and vertex very finely striate-reticulate ( Fig. 62G View FIGURE 62 ); face flat, concentric punctate-rugose, width of face 1.7 × its height; eyes about parallel; clypeus densely punctate, interspaces shiny, 1.6 × wider than high, lower margin of clypeus slightly excised, sinuate; distance between tentorial pits 1.6 × distance between pits and eyes ( Fig. 62F View FIGURE 62 ).

Mesosoma. Length of mesosoma 1.3 × its height; side of pronotum and mesopleuron coarsely reticulate-rugose ( Fig. 62B View FIGURE 62 ); notauli distinct, mesoscutum coarsely areolate-rugose; scutellum evenly convex, coarsely punctate medially, crenulate laterally; scutellar suture comparatively deep, narrow, with carinae; propodeum coarsely rugose, lateral pair of tubercles small ( Fig. 62C View FIGURE 62 ).

Wings. Vein r straight; marginal cell 1.1 × as long as pterostigma; pterostigma 2.7 × longer than wide; r: 3-SR: SR1=14: 17: 66; SR1 slightly sinuate; marginal cell 3.5 × longer than second submarginal cell; 1-CU1: 2-CU1=17: 37; 2-R1 short ( Fig. 62A View FIGURE 62 ).

Legs. Hind coxa mainly smooth; length of hind femur, tibia and basitarsus 3.5 ×, 4.0 × and 4.1× their maximum width, respectively; length of inner hind tibial spur 0.5 × hind basitarsus.

Metasoma. Length of carapace 1.6 × its maximum width in dorsal view, widest after middle, apically rounded; carapace straight striae up to apex ( Fig. 62E View FIGURE 62 ); carapace in lateral view 3.2 × longer than high, posterior height of metasoma 1.6 × its anterior height, posteriorly rather truncate ( Fig. 62D View FIGURE 62 ); carapace apically slightly incurved.

Colour. Body and antenna black; palpi and pterostigma dark brown; middle of wing membrane greyish brown, pterostigma and veins dark brown; legs entirely black; metasomal carapace entirely black.

Male. Antenna damaged and with 16 antennomeres remaining; eyes slightly diverging ventrally; lower margin of clypeus truncate ( Fig. 64G View FIGURE 64 ); metasomal carapace distinctly incurved in lateral view ( Fig. 64D View FIGURE 64 ); apical aperture in posterior view very wide, slit-shaped, 4.5 × wider than high medially and median process of aperture horizontal and oval ( Fig. 64F View FIGURE 64 ); other characters as in female.

Biology. Unknown.

Distribution. China (Liaoning).

Etymology. Named after its wide carapace in dorsal view (only 1.6 × longer than wide): “ platys ” is Greek for broad, wide and “ etron ” is Greek for belly, abdomen.

References

Tobias, V. I. (1986) Cheloninae. In: Medvedev, G. S. (Ed.), Opredelitel Nasekomych Evrospeiskoi Tsasti SSSR 3, Peredpontdatokrylye 4. Opr. Faune SSSR, Nauka, Leningrad, pp. 293 - 335.

Figures

FIGURE 61. Chelonus (Microchelonus) platyetrus sp. nov., female, holotype, habitus, lateral aspect.

FIGURE 62. Chelonus (Microchelonus) platyetrus sp. nov., female, holotype. A, fore wing; B, mesosoma, lateral aspect; C, mesosoma, dorsal aspect; D, metasoma, lateral aspect; E, metasoma, dorsal aspect; F, head, anterior aspect; G, head, dorsal aspect; H, antenna; I, head, lateral aspect.

FIGURE 63. Chelonus (Microchelonus) platyetrus sp. nov., male, paratype, habitus, lateral aspect.

FIGURE 64. Chelonus (Microchelonus) platyetrus sp. nov., male, paratype. A, fore wing; B, mesosoma, lateral aspect; C, mesosoma, dorsal aspect; D, metasoma, lateral aspect; E, metasoma, dorsal aspect; F, metasoma, posterior aspect; G, head, anterior aspect; H, head, dorsal aspect; I, head, lateral aspect.