Blacus (Hysterobolus) yunnanensis Lu & Achterberg & Tang & Chen 2023, sp. nov.
Creators: name: Lu, Qian-Yu
name: Achterberg, Cornelis Van
name: Tang, Pu
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Blacus
Blacus yunnanensis

description: Blacus (Hysterobolus) yunnanensis sp. nov.
(Figs. 11–12)
Material examined. Holotype: ♀, China, Yunnan, Ruili (24º1′N, 97º51′E), 29. IV.1981, He Junhua, NO. 812372 (ZJUH).
Description. Female. Length of body 2.6 mm, length of fore wing 2.5 mm.
Body setosity. Body with long setae, mesopleuron and side of pronotum glabrous, propodeum denser setose than head and mesonotum.
Head. Antenna with at least 18 antennomeres (apex missing); length of first flagellomere 1.8 × second flagellomere; length of first and second flagellomere 4.9 and 2.7 × their width, respectively; length of maxillary palp 1.1 ×height of head; OOL:diameter of posterior ocellus:POL=20:8:11;frons with sparse setae and a deep longitudinal groove in upper second; eyes with short setose, sparse; length of eye in dorsal view 1.2 × temple; occiput slightly concave; face almost entirely smooth; temple smooth; clypeus convex, slightly punctate, smooth; width of clypeus 2.5 × its medial height; tentorial pits large, distance between pits 2.7 × distance from pit to eye; malar suture present, length of malar space 2.0 × basal width of mandible, mandible with long setae.
Mesosoma. Length of mesosoma 1.35 × its height; side of pronotum largely smooth dorsally; precoxal sulcus narrow, with a few short striae, far from the anterior edge of mesopleuron (Fig. 18G); notauli complete, wide and crenulate; mesoscutal lobes rather convex, with long and soft pubescence; scutellar sulcus with median carina; scutellum (superficially) rugulose, its lateral carina lamelliform, distinctly protruding apically; propodeal tubercles small, acute apically, lateral apical angle slightly more than 90°; surface of propodeum rugulose.
Wings. Fore wing: parastigma small; length of pterostigma 3.75 × its maximum width; length of vein r 1.2 × width of pterostigma; vein r arising from apical of pterostigma; 1-CU1:2-CU1 = 12:13. Hind wing: 1r-m:1-M = 20:27; M+CU almost subequal to 1-M; 2-1A absent.
Legs. Hind coxa slightly rugose dorsally, with distinct dorsal carina; length of femur, tibia and basitarsus of hind leg 5.9, 11.5 and 7.1 × their width, respectively, fore tarsal claws with blackish bristles.
Metasoma. Length of first tergite 1.6 × its apical width, widened apically, longitudinally rugose, dorsal carinae distinct in basal 0.7; remainder of tergites smooth; length of ovipositor sheath 0.14 × length of fore wing.
Colour. Reddish-brown; dorsal head black; palpi, tegulae, parastigma, fore and middle legs yellow; medial flagellomeres lighter in colour; mandible yellow, apex red; veins, pterostigma, ovipositor sheath, and metasomal tergite (except first) brown; ovipositor, hind legs coxa, femur and telotarsus yellowish-brown, tibia brown; all apical basitarsus (basal yellow) and claws brown; wing membrane slightly infuscate.
Male. Unknown.
Biology. Unknown.
Distribution. China (Yunnan)
Etymology. The specific name refers to the locality of the holotype.
Notes. The new species is similar to B. (H.) nixoni Haeselbarth, 1973 because the malar suture is present, the scutellum (superficially) rugulose, the propodeal tubercle comparatively small, length of first tergite 1.6 × its apical width, flagellomeres long setose, and face almost entirely smooth, but differs by having the eighth flagellomere 2.2 × longer than wide (about 1.7 × in B. nixoni), length of malar space of 2.0 × basal width of mandible (1.5 ×), dorsal carinae distinct in basal 0.7 (0.9 ×), precoxal sulcus with less striae (with more striae), and body reddish-brown (black).
description: Published as part of Lu, Qian-Yu, Achterberg, Cornelis Van, Tang, Pu & Chen, Xue-Xin, 2023, The discovery of the subgenus Hysterobolus Viereck, 1913 (Hymenoptera, Braconidae, Brachistinae, Blacini, Blacus) in China, with description of nine new species, pp. 472-498 in Zootaxa 5293 (3) on pages 495-497, DOI: 10.11646/zootaxa.5293.3.3, http://zenodo.org/record/7961330