Gammabracon uniformis, Li & Achterberg & Chen, 2020

Li, Yang, Achterberg, Cornelis van & Chen, Xue-xin, 2020, A new genus and eight newly recorded genera of Braconinae Nees (Hymenoptera, Braconidae) from China, with descriptions of fourteen new species, ZooKeys 1038, pp. 105-178 : 105

Gammabracon uniformis sp. nov. Figures 13 , 14

Material examined.

Holotype: ♀, China, Hainan Prov., Jianfengling , 6.V.1983, Gu Maobin, No. IOZ(E)1964585 (IZCAS).

Diagnosis.

This new species is very similar to Gammabracon scrobi Quicke, 1984 [Indonesia], but can be separated from the latter by the following characters: wing membrane uniformly yellow (basal half yellow and apical half greyish brown in G. scrobi ); anterior margin of scutellum with a shallow pit and metanotum without short carina anteriorly (anterior margin of scutellum with a deep pit and metanotum with short carina anteriorly); apical half of medio-longitudinal carina of T I absent (medio-longitudinal carina of T I complete); T IV striate anteriorly, remainder of tergite smooth (entirely smooth).

Description.

Holotype, ♀, length of body 13.2 mm, of fore wing 12.2 mm, of ovipositor sheath 20.7 mm.

Head. Antenna incomplete, with 48 antennomeres remaining; third antennomere 1.5 and 1.6 × longer than fourth and fifth, respectively; third and fourth antennomeres 1.8 and 1.3 × longer than wide, respectively; length of maxillary palp 0.8 × height of head; malar suture with sparse short setae (Fig. 14i ); clypeus height: inter-tentorial distance: tentorio-ocular distance = 7: 11: 9; clypeus coarsely rugose, with sparse long setae; eye not emarginated (Fig. 14g ); face coarsely sculptured, with some sparse and long setae (Fig. 14g ); frons smooth, distinctly depressed behind antennal sockets, with a median groove (Fig. 14h ); vertex smooth, with a few short setae; minimum distance between posterior ocelli: minimum diameter of elliptical posterior ocellus: minimum distance between posterior ocellus and eye = 2: 3: 8; temples largely smooth except for a few weak punctures, and with sparse short setae laterally, subparallel immediately behind eyes (Fig. 14h ); in dorsal view length of eye 1.7 × temple.

Mesosoma. Length of mesosoma 1.7 × its height (Fig. 14c ); notauli distinctly impressed (Fig. 14d ); scutellar sulcus wide and deep, with crenulae (Fig. 14d ); scutellum with a weak emargination medio-anteriorly, and with some short setae posteriorly; metanotum convex medially, but without median carina anteriorly; propodeum largely smooth except for a few crenulae posteriorly, with sparse setae medially, and with dense long setae laterally (Fig. 14d ).

Wings. Fore wing (Fig. 14a ): SR1: 3-SR: r = 43: 26: 8; m-cu 1.2 × longer than 3-CU1; cu-a interstitial. Hind wing (Fig. 14b ): SC+R1 1.7 × longer than 1r-m; anterior margin nearly not concave beyond the subbasal cell.

Legs. Length of fore femur: tibia: tarsus = 37: 43: 57; length of hind femur: tibia: basitarsus = 44: 63: 26; length of femur, tibia and basitarsus of hind leg 4.8, 10.5 and 6.5 × their maximum width, respectively (Fig. 14f ); hind tibial spurs 0.3 and 0.2 × as long as hind basitarsus.

Metasoma. Length of T I 1.4 × its apical width, median area convex and with a few longitudinal carinae (Fig. 14e ); lateral grooves of T I smooth (Fig. 14e ); T II strongly longitudinally rugose but antero-lateral areas smooth (Fig. 14e ); medio-basal area of T II connected to medio-longitudinal carina apically but absent near posterior margin of T II, medio-longitudinal carina with some transverse crenulae laterally; antero-lateral areas of T II rather small, anterior grooves wide, with a few sparse crenulae (Fig. 14e ); second suture deep and wide, with crenulae, more or less straight medially (Fig. 14e ); T III longitudinally rugose but posteriorly and antero-lateral areas smooth, with a strong medio-longitudinal carina not reaching posterior margin of T, median area weakly raised and posteriorly defined by a deep transverse crenulate groove; T IV largely smooth but longitudinally rugose medially; T III and T IV with antero-lateral areas and grooves (T V weak); T V-VII smooth; hypopygium rather acute apically, reaching just beyond the level of apex of metasoma; ovipositor sheath 1.7 × longer than fore wing.

Colour. Largely yellow (Fig. 13 ); antennomeres except scape and pedicel, eye, mandible apically, fore and middle tarsi apically, hind leg, claws, ovipositor sheath black (Figs 13 , 14g, f ); metasomal tergites reddish yellow (Fig. 14e ); wing membrane, pterostigma, and veins yellow (Fig. 14a, b ).

Biology.

Unknown.

Distribution.

China (Hainan).

Etymology.

Named after the all yellow wing membrane, pterostigma and veins: uniformis is Latin for uniform.

Figures

Figure 13. Gammabracon uniformis sp. nov., ♀, holotype, habitus, lateral view.

Figure 14. Gammabracon uniformis sp. nov., ♀, holotype a fore wing b hind wing c mesosoma, lateral view d mesosoma, dorsal view e metasoma, dorsal view f hind leg, lateral view g head, anterior view h head, dorsal view i head, lateral view j scapus outer side, lateral view k apex of ovipositor, lateral view.