Bracon (Lucobracon) coarctatus, Li & He & Chen, 2020
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publication ID |
https://dx.doi.org/10.3897/dez.67.57668 |
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publication LSID |
lsid:zoobank.org:pub:41F77B2A-0E1C-4874-AE89-1E72B3DD6A32 |
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persistent identifier |
https://treatment.plazi.org/id/DC616BD4-CF09-47CB-BC72-FF850DBBA3CA |
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taxon LSID |
lsid:zoobank.org:act:DC616BD4-CF09-47CB-BC72-FF850DBBA3CA |
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treatment provided by |
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scientific name |
Bracon (Lucobracon) coarctatus |
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sp. nov. |
Bracon (Lucobracon) coarctatus sp. nov. Figs 15 View Figure 15 , 16 View Figure 16
Type material.
Holotype. ♀, China, Jilin Prov., Mt. Changbai, 4-20.VIII.1993, Lou Juxian, No. 976388 ( ZJUH).
Diagnosis.
This new species is very similar to B. (L.) histeromeroides Sarhan & Quicke, 1990, but can be separated from the latter by the following characters: mesosoma in lateral view 2.2 × as long as high (1.4 × in B. (L.) histeromeroides ); second metasomal tergite with longitudinal striae medio-basally (slightly “pinched-up” medio-basally, otherwise without sculpture); setose part of ovipositor sheath about as long as metasoma (half as long as metasoma); metasomal tergites largely blackish-brown, second to seventh tergites yellow laterally (entirely darkish brown).
Description.
Holotype, ♀, length of body 3.4 mm, of fore wing 2.6 mm, of ovipositor sheath 1.7 mm.
Head. Antenna with 25 segments; apical antennal segment slightly acute, 1.8 × longer than its maximum width (Fig. 16m View Figure 16 ); first flagellomere 1.6 × longer than wide, 1.0 and 1.1 × longer than second and third, respectively, the latter being 1.3 × longer than wide; malar suture rather weak, with dense short setae; clypeus height: inter-tentorial distance: tentorio-ocular distance = 3: 13: 5; clypeus sparsely short setose; eye not emarginate (Fig. 16g View Figure 16 ); face largely weakly granulate, but medially smooth and with sparse short setae laterally (Fig. 16g View Figure 16 ); eye height: shortest distance between eyes: head width = 12: 17: 30; frons weakly granulate, hardly concave behind antennal sockets, with a rather weak median groove (Fig. 16h View Figure 16 ); vertex smooth, with sparse short setae; shortest distance between posterior ocelli: minimum diameter of elliptical posterior ocellus: shortest distance between posterior ocellus and eye = 4: 3: 8; temples weakly narrowed behind eyes (Fig. 16h View Figure 16 ).
Mesosoma. Length of mesosoma 2.2 × its height (Fig. 16c View Figure 16 ); notauli impressed anteriorly, rather shallow posteriorly (Fig. 16d View Figure 16 ); mesoscutum smooth, with sparse short setae along notaulic courses (Fig. 16d View Figure 16 ); scutellar sulcus deep, moderately wide, with crenulae (Fig. 16d View Figure 16 ); scutellum smooth, with some short setae posteriorly; metanotum moderately convex medially (Fig. 16d View Figure 16 ); propodeum largely smooth, with a short medio-longitudinal carina posteriorly and sparsely setose medially, with dense long setae laterally (Fig. 16j View Figure 16 ).
Wings. Fore wing (Fig. 16a View Figure 16 ): SR1 not reaching tip of wing; SR1: 3-SR: r = 26: 15: 6; 1-SR+M more or less straight, 1.8 × longer than 1-M; 2-SR: 3-SR: r-m = 10: 15: 6; m-cu straight, 1.8 × longer than 2-SR+M; angle between 1-SR and C+SC+R about 80°; cu-a more or less interstitial. Hind wing (Fig. 16b View Figure 16 ): SC+R1: 2-SC+R: 1r-m = 11: 3: 4.
Legs. Length of fore femur: tibia: tarsus = 14: 18: 21; length of hind femur: tibia: basitarsus = 23: 36: 15; length of femur, tibia and basitarsus of hind leg 2.9, 9.0 and 7.5 × their maximum width, respectively; hind tibial spurs 0.3 and 0.4 × as long as hind basitarsus.
Metasoma. Length of first tergite 1.2 × its apical width; first tergite concave medio-basally, median area convex and largely smooth, but rugose posteriorly (Fig. 16k View Figure 16 ); lateral grooves of first tergite moderately wide, with sparse crenulae (Fig. 16k View Figure 16 ); second tergite largely smooth but medio-anteriorly rugose (Fig. 16e View Figure 16 ); median length of second tergite slightly shorter than that of third tergite; second metasomal suture narrow, only crenulate medially, straight medially (Fig. 16e View Figure 16 ); third to seventh tergites smooth (Fig. 16e View Figure 16 ); setose part of ovipositor sheath 0.7 × as long as fore wing.
Colour. Largely blackish-brown (Fig. 15 View Figure 15 ); head largely yellow, antenna, eyes, mandible apically, frons medially, surroundings of stemmaticum and temples (but laterally yellow) blackish-brown (Fig. 16g, h View Figure 16 ); legs largely yellow, claws, hind tibia apically and hind tarsus dark brown (Fig. 16f View Figure 16 ); second to seventh metasomal tergites laterally yellow (Fig. 16e View Figure 16 ); wing membrane pale yellow, pterostigma dark brown and veins yellowish-brown to dark brown (Fig. 16a, b View Figure 16 ).
Biology.
Unknown.
Distribution.
China (Jilin).
Etymology.
Named after the compressed mesosoma: “coarctatus” is Latin for “compressed”.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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