Chelonus (Stylochelonus) punctulosus 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 punctulosus

description: Chelonus (Stylochelonus) punctulosus sp. nov.
Figs 105–108
Material examined. Holotype: female, Dangchang Daheba, Gansu Prov., China, 31.VII.2004, Xuexin Chen, No. 20047049 (ZJUH). Paratype: 1 male, same label data as holotype but Min Shi, No. 20046984.
Diagnosis. This new species is similar to C. (S.) mucronatus (Thomson, 1874), because both have apex of carapace with a distinct apical tooth in dorsal view (Fig. 106E, 108E), but they can be separated by the following characters: temples strongly narrowed posteriorly behind eyes in dorsal view (Figs 106G, 108H) (versus strongly widened in C. (S.) mucronatus); metasomal carapace widest at middle (Figs 106E, 108E) (versus after middle); and metasomal carapace of female with a yellowish spot medio-basally (Fig. 108E) (versus entirely black).
Description. Holotype, female, length of body 3.1 mm, of fore wing 3.0 mm.
Head. Head transverse, width of head 1.7 × its dorsal length; occiput hardly excavated; antenna damaged and with 23 antennomeres remaining, clearly widened medially, length of 3 rd antennomere 3.1 × its width; eye 2.1 × as long as temple in dorsal view; OOL: OD: POL=17: 6: 13; temple strongly narrowed behind eyes; frons and vertex striate-rugulose (Fig. 106G); face flat, transversely punctate-rugose, width of face 1.5 × its height; eyes about parallel; clypeus sparsely punctate, interspaces shiny, 1.6 × wider than high, distance between tentorial pits 1.4 × distance between pits and eyes (Fig. 106F).
Mesosoma. Length of mesosoma 1.5 × its height; side of pronotum finely punctate, mesopleuron punctate-rugose and finely punctate (Fig. 106B); notauli indistinct; mesoscutum coarsely punctate-rugose, scutellum slightly convex, rugulose; scutellar suture comparatively deep and with carinae; propodeum coarsely rugose, tubercles distinct (Fig. 106C).
Wings. Vein r somewhat arched; marginal cell 0.8 × as long as pterostigma; pterostigma 3.5 × longer than wide; r: 3-SR: SR1=16: 12: 74; SR1 straight; marginal cell 3.0 × longer than second submarginal cell; 1-CU1: 2-CU1=13: 32; 2-R1 short (Fig. 106A).
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 3.0 × its maximum width, widest at middle, apex of carapace with a distinct apical tooth; carapace striate-rugose up to basal 70%, rugose apically (Fig. 106E); carapace in lateral view 3.0 × longer than high, posterior height of metasoma 1.5 × its anterior height, carapace apically slightly incurved (Fig. 106D).
Colour. Black; antenna brown but scapus yellow; mandible light brown; palpi white; pterostigma light brown; parastigma, wing and its veins light yellowish; legs almost entirely yellow, but hind tibia brown and with narrow light ring; metasomal carapace with one medial yellow spot.
Male. Antennomeres 27, antenna filiform, not widened, length of 3 rd and penultimate antennomeres 2.7 × and 1.8 × their width, respectively (Fig. 108I); lateral teeth of propodeum weak and small (Fig. 108C); vein SR1 sinuate (Fig. 108A); apical aperture in posterior view small, nearly round (Fig. 108F); carapace entirely black; other characters as in female (Fig. 107).
Biology. Unknown.
Distribution. China (Gansu).
Etymology. Named after its finely punctate mesopleuron, “ punctulosus ” is Latin for more finely punctate.
Note. We found that Мicrochelonus (Рarachelonus) rubriventris (Tobias, 1988) does not fit well in subgenus Рarachelonus because it fits the characters of the subgenus Baculonus (Zhou et al. 2022a) and, therefore, we transfer it to the later subgenus, and Chelonus (Baculonus) rubriventris (Tobias, 1988) is a new combination.
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 120-124, DOI: 10.11646/zootaxa.5412.1.1, http://zenodo.org/record/10675974