Stenobracon (Stenobracon) longatus Li & He & Chen 2020, sp. nov.
Creators: name: Li, Yang
name: He, Jun-Hua
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Stenobracon
Stenobracon longatus

description: Stenobracon (Stenobracon) longatus sp. nov.
Figs 41–42
Type material. Holotype. ♀, China, Zhejiang Prov., Songyang, 11.X.1986, Chen Hanlin, No. 870536 (ZJUH). Paratype: 1♂, China, Zhejiang Prov., Dinghai, 5. VI.1982, Wan Xingsheng, No. 822294 (ZJUH).
Diagnosis. This new species is very similar to Stenobracon (S.) brevis Chishti et Quicke, 1996, but can be separated from the latter by the following characters: second submarginal cell of fore wing rather long, 3-SR: r = 2.2: 1.0 (rather short in S. (S.) brevis, 3-SR: r = 1.4–2.0: 1.0); third metasomal tergite largely rugose, with antero-lateral areas smooth (largely smooth, only raised basal area somewhat rugose); head with a black spot on either side of lateral ocellus (without black spots); fifth and sixth metasomal tergites black (sixth not laterally) (yellowish brown).
Description. Holotype, ♀, length of body 11.5 mm, of fore wing 8.5 mm, of ovipositor sheath 17.5 mm.
Head. Antenna with 84 antennomeres; apical flagellomere slightly acute, 2.4 × longer than its maximum width; penultimate flagellomere 1.6 × longer than its maximum width, and 0.7 × as long as apical flagellomere; median flagellomeres 1.3 × longer than its width; first flagellomere 1.2 and 1.4 × longer than second and third, respectively, the latter being 1.2 × longer than wide; scapus 1.6 × longer than its apically width (Fig. 42l); malar suture with some short setae and weak punctures (Fig. 42g); tentorio-ocular distance: inter-tentorial distance: maximum width across mandibles = 1.0: 1.8: 3.1; clypeus with sparse long setae; eye weakly emarginated (Fig. 42g); face sparsely punctate, and with dense short setae laterally (Fig. 42g); face width: head width: eye height = 1.0: 1.8: 0.85; frons smooth, weakly concave behind antennal sockets, median groove indistinct (Fig. 42h); vertex smooth, with sparse short setae; shortest distance between posterior ocellus and eye: distance between median ocellus and antennal socket: width of head behind eyes (occiput) = 1.0: 0.7: 4.1; temples subparallel-sided behind eyes (Fig. 42h).
Mesosoma. Length of mesosoma 1.8 × its height (Fig. 42c); notauli only impressed anteriorly (Fig. 42d); mesoscutum smooth and sparsely short setose (Fig. 42d); scutellar sulcus deep, moderately narrow, with crenulae (Fig. 42d); scutellum smooth, with dense short setae posteriorly; metanotum moderately convex medially (Fig. 42d); propodeum largely smooth, without medio-longitudinal carina or groove, and sparsely setose medially, with dense long setae laterally (Fig. 42j).
Wings. Fore wing (Fig. 42a): second submarginal cell rather long; SR1: 3-SR: r = 3.1: 2.2: 1.0; 1-SR+M weakly curved posteriorly towards anterior wing margin, 1.5 × longer than 1-M; 2-SR: 3-SR: r-m = 1.2: 2.3: 1.0; m-cu straight, 3.8 × longer than 2-SR+M. Hind wing (Fig. 42b): 1r-m more or less straight, 0.8 × longer than SC+R1.
Legs. Length of fore femur: tibia: tarsus = 21: 27: 40; length of hind femur: tibia: basitarsus = 34: 51: 24; length of hind basitarsus of leg 8.2 × its maximum width.
Metasoma. Length of first tergite 1.3 × its apical width, concave medio-basally, median area convex and ovoid, smooth anteriorly, sculptured posteriorly (Fig. 42k); first tergite without lateral carina, lateral grooves narrow and crenulate (Fig. 42k); apical width of second tergite 1.4 × its medial length; triangular medio-basal area of second tergite large and smooth; antero-lateral areas of second tergite large and smooth, oblique anterior grooves narrow and weakly crenulate posteriorly; second tergite largely rugose except for medio-basal and antero-lateral areas (Fig. 42e); second suture deep, crenulate, more or less straight medially (Fig. 42e); apical width of third tergite 2.4 × its medial length; antero-lateral areas of third tergite convex; antero-lateral grooves of third tergite largely deep, weakly crenulate and joining medially; antero-lateral areas of fourth tergite large (Fig. 42e); third–fourth tergites largely rugose except for antero-lateral areas and posteriorly, and with transverse subposterior grooves (of third tergite crenulate, but of fourth tergite largely smooth); fifth–seventh tergites smooth (Fig. 42e); hypopygium acute apically, reaching far beyond level of apex of metasoma; ovipositor sheath 2.1 × longer than fore wing.
Colour. Largely yellow (Fig. 41); antenna, mandible apically, stemmaticum and ovipositor sheaths black, and with a black spot on either side of lateral ocellus, middle lobe of mesoscutum and lateral lobes anteriorly somewhat infuscate (Figs 41, 42d, 42g, 42h); middle and hind tibia apically, fore and middle tarsi yellowish brown, claws, and hind tarsus dark brown (Fig. 42f); fifth and sixth metasomal tergites black (but sixth tergite laterally yellow) (Fig. 42e); wing membrane largely smoky grey, fore wing with two pale longitudinal areas medially and subapically, and with a dark brown stigmal spot up to vein 1-SR+M, and a dark brown spot in marginal cell anteriorly; pterostigma basally yellow and apically dark brown, and veins dark brown (Figs 42a, 42b).
Male. Length of body 7.2mm, of fore wing 5.4mm; tentorio-ocular distance: inter-tentorial distance: maximum width across mandibles = 1.0: 2.73: 4.55; face width: head width: eye height = 1.0: 2.08: 1.04; shortest distance between posterior ocellus and eye: distance between median ocellus and antennal socket: width of head behind eyes (occiput) = 1.0: 0.88: 3.62; fore wing vein SR1: 3-SR: r = 4.18: 2.68: 1.0; vein 1r-m of hind wing 0.9 × length of vein SC+R1; apical width of second metasomal tergite 1.8 × its medial length; head without black spot around stemmaticum area; fifth and sixth metasomal tergites yellow.
Biology. Unknown.
Distribution. China (Zhejiang).
Etymology. Named after the rather long second submarginal cell of fore wing: “longus” is Latin for “long”.
description: Published as part of Li, Yang, He, Jun-Hua & Chen, Xue-Xin, 2020, Review of six genera of Braconinae Nees (Hymenoptera, Braconidae) in China, with the description of eleven new species, pp. 1-74 in Zootaxa 4818 (1) on pages 52-56, DOI: 10.11646/zootaxa.4818.1.1, http://zenodo.org/record/3954745