Stenobracon (Stenobracon) longatus, Li & He & Chen, 2020

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, Zootaxa 4818 (1), pp. 1-74 : 52-56

publication ID	https://doi.org/ 10.11646/zootaxa.4818.1.1
publication LSID	lsid:zoobank.org:pub:66ABE334-716A-420A-B7E7-72025C273DE9
DOI	https://doi.org/10.5281/zenodo.6493643
persistent identifier	https://treatment.plazi.org/id/3137517C-FFF0-FC31-FF60-FAF6FAE960B8
treatment provided by	Plazi
scientific name	Stenobracon (Stenobracon) longatus
status	sp. nov.

Treatment

Stenobracon (Stenobracon) longatus sp. nov.

Figs 41–42 View FIGURE 41 View FIGURE 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 View FIGURE 42 ); malar suture with some short setae and weak punctures ( Fig. 42g View FIGURE 42 ); 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 View FIGURE 42 ); face sparsely punctate, and with dense short setae laterally ( Fig. 42g View FIGURE 42 ); face width: head width: eye height = 1.0: 1.8: 0.85; frons smooth, weakly concave behind antennal sockets, median groove indistinct ( Fig. 42h View FIGURE 42 ); 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 View FIGURE 42 ).

Mesosoma. Length of mesosoma 1.8 × its height ( Fig. 42c View FIGURE 42 ); notauli only impressed anteriorly ( Fig. 42d View FIGURE 42 ); mesoscutum smooth and sparsely short setose ( Fig. 42d View FIGURE 42 ); scutellar sulcus deep, moderately narrow, with crenulae ( Fig. 42d View FIGURE 42 ); scutellum smooth, with dense short setae posteriorly; metanotum moderately convex medially ( Fig. 42d View FIGURE 42 ); propodeum largely smooth, without medio-longitudinal carina or groove, and sparsely setose medially, with dense long setae laterally ( Fig. 42j View FIGURE 42 ).

Wings. Fore wing ( Fig. 42a View FIGURE 42 ): 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 View FIGURE 42 ): 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 View FIGURE 42 ); first tergite without lateral carina, lateral grooves narrow and crenulate ( Fig. 42k View FIGURE 42 ); 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 View FIGURE 42 ); second suture deep, crenulate, more or less straight medially ( Fig. 42e View FIGURE 42 ); 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 View FIGURE 42 ); 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 View FIGURE 42 ); hypopygium acute apically, reaching far beyond level of apex of metasoma; ovipositor sheath 2.1 × longer than fore wing.

Colour. Largely yellow ( Fig. 41 View FIGURE 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 View FIGURE 41 , 42d, 42g, 42h View FIGURE 42 ); middle and hind tibia apically, fore and middle tarsi yellowish brown, claws, and hind tarsus dark brown ( Fig. 42f View FIGURE 42 ); fifth and sixth metasomal tergites black (but sixth tergite laterally yellow) ( Fig. 42e View FIGURE 42 ); 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 View FIGURE 42 ).

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”.