Streblocera (Eutanycerus) uncifera Li, Chen & van Achterberg, 2021

Li, Jun, Achterberg, Cornelis van, Zheng, Min-Lin & Chen, Jia-Hua, 2021, Revision of Streblocera Westwood (Hymenoptera, Braconidae, Euphorinae) from China, with the description of seven new species, ZooKeys 1044, pp. 729-782 : 729

Streblocera (Eutanycerus) uncifera Li, Chen & van Achterberg sp. nov. Figures 14A-G , 15H-L

Type material.

Holotype, ♀, SW China, Yunnan Province, Xishuangbanna, 14.ix.1988, Li-qin Zhang.

Description.

Holotype, ♀, length of antenna 3.1mm, of fore wing 3.5 mm, and of body 4.4 mm (Fig. 14A ).

Head. Antenna with 23 antennomeres and 0.9 × as long as fore wing, 0.8 × as long as body (Fig. 14A ); scapus long and slender, weakly expanded, 7.5 × longer than its maximum width, evenly curved, with a small tooth-shaped horn, finely setose (Fig. 14C ); first to seventh flagellomere modified: first to seventh flagellomeres serrate ventrally, serrated carina enlarged, respectively, and carina of seventh flagellomere with hook (Fig. 14D ); first flagellomere 1.8 × longer than second flagellomere, first, second and penultimate flagellomere 1.5, 0.8 and 1.4 × as long as wide, respectively (Figs 14D , 14E ); eye 1.2 × longer than temple in dorsal view; temples slightly roundly narrowed behind eyes (Fig. 14F ); ocelli small, OOL:OD:POL = 83:21:41 (Fig. 14F ); frons and vertex largely punctate (Fig. 14F ); occipital carina occipital carina nearly complete, interrupted medio-dorsally (Fig. 14F ); face 1.6 × wider than high, smooth (Fig. 14G ); clypeus punctate, narrow than face, strongly convex, 2.5 × wider than high (Fig. 14G ); dorsal margin of clypeus slightly above level of ventral margin of eye anterior (Fig. 14G ); tentorial pits large (Fig. 14G ); malar suture shallow and narrow, length of malar space 1.4 × basal width of mandible (Fig. 14G ); mandibles long and slender, nearly completely overlapping when closed (Fig. 14G ).

Mesosoma. Length of mesosoma 2.1 × its height (Fig. 15I ); side of pronotum crenulated anteriorly and medially, largely smooth and shiny (Fig. 15I ); propleuron smooth and shiny (Fig. 15I ); mesopleuron smooth (Fig. 15I ); prepectal medio-ventral carina present (Fig. 15I ); episternal scrobe short and wide (Fig. 15I ); precoxal sulcus long, wide and crenulate (Fig. 15I ); mesonotum moderately sparsely setose, flat, smooth and, rugose anteriorly (Fig. 15H ); notauli narrow, posteriorly rugose; mesoscutum sparsely setose, flattened (Fig. 15H ); scutellar sulcus wide and smooth with one distinct crenula (Fig. 15H ); scutellum flat, smooth (Fig. 15H ); metapleuron reticulate (Fig. 15I ); propodeum with rather short basal carina and pentagon-shaped median area dorsally, laterally rugulose (Fig. 15J ).

Wings. Fore wing (Fig. 15L ): vein 1-SR+M absent; vein 1-R1 0.8 × as long as pterostigma; vein SR1+3-SR curved; r:2-SR = 11:53; vein r issued from middle of pterostigma; vein m-cu cross vein 2-SR; vein cu-a nearly as long as vein 1-CU1 and postfurcal.

Legs. Fore leg: tibia 5.4 × longer than coxa, 1.2 × longer than femur; middle leg: tibia 3.7 × longer than coxa, 1.1 × longer than femur; hind leg: tibia 4.4 × longer than coxa, 1.4 × longer than femur; hind coxa smooth, 1.2 × longer than wide; femur, tibia and basitarsus 8.0, 13.6 and 8.9 × longer than wide, respectively; hind basitarsus 0.4 × as long as hind tibia, and 0.8 × as long as combined second to fifth tarsal segments; hind fourth tarsal segment 0.9 × as long as fifth tarsal segment.

Metasoma. First tergite robust, 1.7 × longer than its apical width, apical width 3.4 × longer than its minimum width, with dorsope basally but no laterope (Fig. 15K ); first tergite smooth basally, rugose laterally (Fig. 15K ); following tergites smooth and shiny; ovipositor sheath robust and base half crenulate, 0.1 × as long as fore wing; ovipositor robust curved upwards (Fig. 15B ).

Colour. Yellowish brown to brown; palpi pale yellow; legs yellowish brown; face, antenna, scutellum, metanotum brown; wing membrane hyaline, pterostigma and veins brown; ovipositor sheath and ovipositor dark brown.

Remarks.

This new species is similar to S. (E.) hsiufui You, 1999, but differs from it as follows: (i) first to seventh flagellomeres serrate ventrally, only the carina of seventh flagellomere with hook (first to seventh flagellomeres serrate ventrally and all with hook in S. hsiufui ); (ii) first metasomal segment more robust, 1.7 × longer than its apical width (first metasomal segment 2.3 × longer than its apical width); (iii) ovipositor sheath more robust and ovipositor curved upwards (ovipositor sheath slender and ovipositor wave-like bent); (iv) body yellowish brown to brown (body dark brown).

Biology.

Unknown.

Distribution.

Oriental: China (Yunnan).

Etymology.

Named after hook bearing seventh flagellomere: “uncus” is “hook” in Latin and “fero” is Latin for “carry”.

Figures

Figure 14. Streblocera (Eutanycerus) uncifera Li, Chen and van Achterberg, sp. nov., ♀ A abitus, lateral aspect B ovipositor and its sheaths, lateral aspect C scapus D first to seventh flagellomeres, lateral aspect E eighth to twenty-first flagellomeres, lateral aspect F head, dorsal aspect G head, anterior aspect.

Figure 15. Streblocera (Eutanycerus) uncifera Li, Chen and van Achterberg, sp. nov., ♀ H mesosoma, dorsal aspect I mesosoma, lateral aspect J propodeum, dorsal aspect K first metasomal tergites, dorsal aspect L fore wing.