Chelonus (Stylochelonus) acaretrus, 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 : 116-118

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.10676128
persistent identifier	https://treatment.plazi.org/id/2B5587AD-F07D-730C-FF39-6CADFF07B8E4
treatment provided by	Plazi
scientific name	Chelonus (Stylochelonus) acaretrus
status	sp. nov.

Treatment

Chelonus (Stylochelonus) acaretrus sp. nov.

Figs 101–104 View FIGURE 101 View FIGURE 102 View FIGURE 103 View FIGURE 104

Material examined. Holotype: female, Gutian Mt. , Zhejiang Prov., China, 3.VII.2005, Hongying Zhang, No. 200602221 ( ZJUH) . Paratypes: 1 female, Shenyang , Liaoning Prov., China, 10.VII.1994, Juxian Lou, No. 947173 ; 1 male, Dongliao , Jilin Prov., China, 22–31.VII.1988, Xiaoming Lou, No. 888131 ; 1 female, Lao Mt. , Shandong Prov., China, 4.VIII.1995, Junhua He, No. 955892 ; 1 male, Baotianman , Henan Prov., China, 13–15.VII.1998, Xuexin Chen, No. 991789 ; 2 females, Qingchen Mt. , Sichuan Prov., China, 19.VII.2006, Zhilei Gao, Nos. 200610765, 200610766 ; 1 female, Longxi Mt. , Fujian Prov., China, 8.VII.1991, Changming Liu, No. 969745 ; 1 male, Xiangtuo Mt. , Guangdong Prov., China, 11. V.2004, Zaifu Xu, No. 20048091 ; 2 females and males, Longsheng Huaping , Guangxi Prov., China, 25–26. VI.1982, Junhua He, Nos. 23608, 82382, 822028, 823067 ; 1 male, Bawang Ling , Hainan Prov., China, 20–23.VIII.2005, Jinxian Liu, No. 200702347 .

Diagnosis. This new species is similar to C. (S.) pedator ( Dahlbom, 1833) , both species having the metasomal carapace very short, but they can be separated by the following characters: temples strongly narrowed posteriorly behind eyes in dorsal view ( Fig. 102G View FIGURE 102 ) (versus strongly widened in C. (S.) predator ); metasomal carapace widest at middle ( Fig. 102E View FIGURE 102 ) (versus tapering towards base) and face 1.9 × wider than high ( Fig. 102F View FIGURE 102 ) (versus 1.5 ×).

Description. Holotype, female, length of body 2.9 mm, of fore wing 2.7 mm.

Head. Head transverse, width of head 2.5 × its dorsal length; occiput slightly excavated; antennomeres 22, filiform, antenna slightly widened after middle, length of 3 rd and penultimate antennomeres 3.9 × and 2.2 × their width, respectively; eye 1.5 × as long as temple in dorsal view; OOL: OD: POL=19: 7: 11; temple strongly narrowed behind eyes; frons and vertex striate-rugulose ( Fig. 102G View FIGURE 102 ); face flat, transverse punctate-rugose, width of face 1.9 × its height; eyes about parallel; clypeus sparsely punctulate, interspaces shiny, 2.2 × wider than high, distance between tentorial pits 1.2 × distance between pits and eyes ( Fig. 102F View FIGURE 102 ).

Mesosoma. Length of mesosoma 1.3 × its height; side of pronotum reticulate-rugose, mesopleuron coarsely reticulate-rugose ( Fig. 102B View FIGURE 102 ); notauli indistinct; anterior part of mesoscutum dense punctate and posterior part coarsely reticulate-rugose, scutellum slightly convex, rugose; scutellar suture comparatively deep and with carinae; propodeum coarsely rugose, tubercles distinct ( Fig. 102C View FIGURE 102 ).

Wings. Vein r straight; marginal cell 0.9 × as long as pterostigma; pterostigma 3.5 × longer than wide; r: 3-SR: SR1=14: 11: 62; SR1 straight; marginal cell 2.8 × longer than second submarginal cell; 1-CU1: 2-CU1=15: 29; 2-R1 absent ( Fig. 102A View FIGURE 102 ).

Legs. Hind coxa smooth and shiny; length of hind femur, tibia and basitarsus 3.0 ×, 4.9 × and 3.6 × their maximum width, respectively; length of inner hind tibial spur 0.5 × hind basitarsus.

Metasoma. Length of carapace 1.7 × its maximum width, widest at middle, apex of carapace with small tubercle; basal 0.7 of carapace striate-rugose and reticulate-rugose apically ( Fig. 102E View FIGURE 102 ); carapace in lateral view 2.4 × longer than high, posterior height of metasoma 1.5 × its anterior height, carapace apically slightly incurved ( Fig. 102D View FIGURE 102 ).

Colour. Reddish brown; antenna brown; mandible light brown; palpi light brown; pterostigma and parastigma dark brown; wing and its veins medium light brown; legs partly brown; carapace entirely black.

Male. Antennomeres 27, antenna clearly widened medially, antenna three coloured, 3 rd –5 th antennomeres light brown, 6 th –9 th yellowish and remainder of antennomeres brown ( Fig. 104I View FIGURE 104 ); carapace apically almost not incurved ( Fig. 104D View FIGURE 104 ); apical aperture in posterior view small and nearly round ( Fig. 104F View FIGURE 104 ); carapace with yellowish band in basal 1/3; other characters as in female ( Fig. 104E View FIGURE 104 ).

Biology. Unknown.

Distribution. China (Fujian, Guangdong, Guangxi, Hainan, Henan, Jilin, Liaoning, Shandong, Sichuan, Zhejiang).

Etymology. Named after its short metasomal carapace, “ acares ” is Greek for short and “ etrom ” is Greek for belly.