Phaedrotoma nigrisoma Li & van Achterberg

Li, Xi-Ying, Achterberg, Cornelis van & Tan, Ji-Cai, 2013, Revision of the subfamily Opiinae (Hymenoptera, Braconidae) from Hunan (China), including thirty-six new species and two new genera, ZooKeys 268, pp. 1-186: 86-88

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Phaedrotoma nigrisoma Li & van Achterberg

sp. n.

Phaedrotoma nigrisoma Li & van Achterberg   ZBK   sp. n. Figs 257-263

Type material.

Holotype, ♂ (ZUH), "S. China: Hunan, nr Changsha, Ningxiang, 5.X.1986, Xiao-ming Ou".


Antenna of male with about 21 segments and about as long as fore wing; clypeus comparatively narrow, width of clypeus 4.0 times its maximum height (Fig. 260); body black; legs dark brown; vein SR1 of fore wing 3 times as long as vein 3-SR; vein 3-SR 1.7 times as long as vein 2-SR (Fig. 258); length of hind femur about 5.6 times its width.


Holotype, ♂, length of body 1.4 mm, of fore wing 1.6 mm.

Head. Antenna with 21 segments and about as long as fore wing; length of third segment 1.2 times fourth segment, length of third, fourth and penultimate segments 3.2, 2.8, and 1.9 times their width, respectively (Fig. 257); length of maxillary palp 0.9 times height of head; labial palp segments normal; occipital carina removed from hypostomal carina and dorsally absent; length of eye in dorsal view 1.6 times temple; frons glabrous, slightly convex laterally; face largely smooth but laterally superficially punctate, medially distinctly elevated (Fig. 260); width of clypeus 4.0 times its maximum height and 0.8 times width of face; clypeus distinctly convex, punctate and its ventral margin curved (Fig. 260); hypoclypeal depression large (Fig. 260); malar suture present; malar space 0.3 times basal width of mandible; mandible gradually widened basally, with narrow and ventral carina (Fig. 261).

Mesosoma. Length of mesosoma 1.2 times its height; dorsal pronope round (Fig. 263); pronotal side largely smooth but partly superficially granulate (Fig. 257); epicnemial area smooth dorsally; precoxal sulcus only medially impressed, finely sculptured; remainder of mesopleuron and pleural sulcus smooth; anterior groove of metapleuron smooth; notauli absent on disc, only anteriorly indicated by shallow depressions (Fig. 259); mesoscutum glabrous; medio-posterior depression of mesoscutum absent; scutellar sulcus moderately crenulate; scutellum smooth or nearly so; surface of propodeum largely smooth, without carinae (Fig. 259).

Wings. Fore wing (Fig. 258): pterostigma slender elliptical, narrowed apically; 1-R1 not reaching wing apex and 0.9 times as long as pterostigma; r:3-SR:SR1 = 4:16:52; r widened; 2-SR:3-SR:r-m = 13:16:5; 1-M straight; SR1 nearly straight; m-cu distinctly postfurcal; cu-a postfurcal and 1-CU1 widened; first subdiscal cell opened, CU1b absent; Hind wing (Fig. 258): M+CU:1-M:1r-m = 11:20:9; cu-a straight; m-cu absent.

Legs. Length of femur, tibia and basitarsus of hind leg 5.6, 7.4 and 3.8 times as long as wide, respectively; hind femur and tibia with medium-sized setae (Fig. 257).

Metasoma. Length of first tergite 0.7 times its apical width, its surface distinctly convex and largely smooth (Fig. 263); second and third tergites smooth.

Colour. Black; antenna, palpi and legs dark brown; pterostigma and veins dark brown; wing membrane subhyaline.

Molecular data. None.


*China (Hunan).




Name derived from “niger” (Latin for “black”) and “soma” (Latin for “body”), because of the black body.


The new species runs with difficulty in the key by Chen and Weng (2005) to Rhogadopsis sulcifer   (Fischer, 1975) comb. n., but Phaedrotoma nigrisoma   has vein m-cu angled with veins 2-M and 2-CU1 (linear or gradually merging in Rhogadopsis sulcifer   ), malar space 0.3 times as long as basal width of mandible (equal) and propodeum smooth (areolate).