Bicarinibracon concolor Li, Achterberg, Yan & Chen, 2024, sp. nov.
Creators: name: Li, Yang
name: van Achterberg, Cornelis
name: Yan, Cheng-Jin
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Bicarinibracon
Bicarinibracon concolor

description: Bicarinibracon concolor sp. nov.
Figs 1, 2
Type material.
Holotype: China • ♀; Hainan Prov., Wanning, Xinglong Tropical Botanical Garden; 18°43'51"N, 110°11'24"E; 30.vi–9.x.2021; Wang Zheng leg.; No. MT 2, WZ 44, 2022011 (CDNU).
Diagnosis.
This new species has the body colouration very similar to Bicarinibracon luteus Quicke & Walker, but can be separated from the latter by the following characters: postero-lateral lobes of third and fourth metasomal tergites rounded and not strongly protruding (acute and strongly protruding in B. luteus); third to fifth metasomal tergites largely longitudinally striate (only medially striate, but more confused rugulose posteriorly and laterally in B. luteus); hind wing vein 1 r-m relatively long, 0.6 times the length of vein SC + R 1 (0.4 times in B. luteus); first metasomal tergite with 2 strong and complete transverse carinae running between dorsal and dorso-lateral carinae (without crenulae in B. luteus); antenna largely dark brown, except for scapus brownish (largely brownish mustard-yellow but terminal few antennomeres mid-brown in B. luteus).
Description.
Holotype, ♀, length of body 6.0 mm, of fore wing 5.6 mm, of ovipositor sheath 3.2 mm.
Head. Antenna incomplete, 40 segments remaining; median segments 1.3 times longer than its width; third segment 1.6 times longer than its width, 1.3 and 1.4 times longer than fourth and fifth respectively, the latter 1.3 times longer wide; length of maxillary palp 0.6 times height of head; malar suture long and distinct, with sparse short setae (Fig. 2 i); clypeus height: inter-tentorial distance: tentorio-ocular distance = 5: 10: 9; clypeus with sparse long setae (Fig. 2 i); eye glabrous, weakly emarginate (Fig. 2 g); face moderately densely punctate, with dense and long setae (Fig. 2 g); eye height: shortest distance between eyes: head width = 9: 12: 23; frons moderately concave behind antennal sockets, largely smooth except for a few weak punctures, with some sparse short setae and a strong median groove (Fig. 2 h); vertex with sparse weak punctures and some short setae (Fig. 2 h); minimum distance between posterior ocelli: minimum diameter of elliptical posterior ocellus: minimum distance between posterior ocellus and eye = 6: 7: 20; length of malar space 1.8 times basal width of mandible; in dorsal view length of eye 2.4 times temple; temples moderately densely setose, and gradually narrowed behind eyes (Fig. 2 h).
Mesosoma. Length of mesosoma 1.5 times its height (Fig. 2 c); pronotum largely glabrous (Fig. 2 c); anterior half of notauli deeply impressed and posterior half shallow (Fig. 2 d); mesoscutum evenly densely setose; scutellar sulcus comparatively wide, with sparse (only 8) crenulae (Fig. 2 d); scutellum densely setose posteriorly (Fig. 2 d); metanotum convex medially, with a developed median carina anteriorly (Fig. 2 d); propodeum densely setose, and somewhat longer laterally, propodeal carinae complete (Fig. 2 d).
Wings. Fore wing (Fig. 2 a): SR 1: 3 - SR: r = 34: 20: 5; 1 - SR + M rather weakly curved subbasally, 1.7 times as long as 1 - M; 2 - SR: 3 - SR: r-m = 12: 20: 9; CU 1 b 0.7 times as long as 3 - CU 1; angle between 1 - SR and C + SC + R ca. 50 °; cu-a interstitial. Hind wing (Fig. 2 b): 1 r-m straight; SC + R 1: 2 - SC + R: 1 r-m = 40: 18: 25.
Legs. Length of fore femur: tibia: tarsus = 15: 18: 25; length of hind femur: tibia: basitarsus = 17: 20: 8; length of femur, tibia and basitarsus of hind leg 3.0, 6.6 and 4.5 times their maximum width, respectively; hind tibial spurs 0.3 and 0.4 times as long as hind basitarsus; hind femur, tibia and tarsus densely setose, setae of tarsus rather short.
Metasoma. Length of first metasomal tergite about 0.8 times as long as its apical width; lateral area of first tergite comparatively wide, with 2 strong and complete transverse carinae running between dorsal and dorso-lateral carinae, and with 3 transverse carinae both sides of medio-longitudinal carina (Fig. 2 j); second tergite 1.7 times wider than medially long, largely coarsely striate-sculptured except the smooth medio-basal area, lateral grooves converging posteriorly (Fig. 2 e); second suture strongly crenulate, narrow and weakly curved medially, widened laterally (Fig. 2 e); third to fifth metasomal tergites largely longitudinally striate-sculptured (Fig. 2 e); postero-lateral lobes of third and fourth metasomal tergites smooth, rounded and not strongly protruding (Fig. 1); sixth metasomal tergite smooth and shiny; hypopygium acute apically, not reaching level of apex of metasoma; ovipositor sheath 0.6 times as long as fore wing.
Colour. Largely yellowish (Fig. 1), but antenna (except for scapus brownish), eyes, mandible apically and claws dark brown (Figs 1, 2 f, g, k); notaular area and median mesoscutal lobe posteriorly pale yellow (Fig. 2 d); ovipositor sheath black (Fig. 1); wing membrane yellowish, pterostigma and veins pale brown (Fig. 2 a, b).
Biology.
Unknown.
Distribution.
Oriental (China- Hainan).
Etymology.
Named after the yellowish body: “ concolor ” is Latin for “ coloured uniformly ”.
description: Published as part of Li, Yang, van Achterberg, Cornelis, Yan, Cheng-Jin & Chen, Xue-Xin, 2024, Review of Bicarinibracon Quicke & Walker and Chelonogastra Ashmead (Hymenoptera, Braconidae, Braconinae) in China, with the description of two new species, pp. 1285-1299 in Journal of Hymenoptera Research 97 on pages 1285-1299, DOI: 10.3897/jhr.97.138683