Separatatus parallelus, Zhu, Jia-Chen, Achterberg, Cornelis van & Chen, Xue-Xin, 2017

Zhu, Jia-Chen, Achterberg, Cornelis van & Chen, Xue-Xin, 2017, An illustrated key to the genera and subgenera of the Alysiini (Hymenoptera, Braconidae, Alysiinae), with three genera new for China, ZooKeys 722, pp. 37-79 : 66-68

Separatatus parallelus sp. n. Figs 15, 16-28

Material.

Holotype, ♀ (ZJUH), "[S. China:], Yunnan, green water nuclear power station, 536 m, 23.vii.2003, Xu Zaifu, No. 20055387". Paratype: 1 ♂ (ZJUH), "Hainan, Yinggeling, 283.v.2007, Weng Liqiong, No. 200804310".

Description.

Holotype, ♀, length of body 2.5 mm, of fore wing 2.6 mm.

Head. Transverse and shiny, concave posteriorly (Fig. 23), width of head 1.8 times its lateral length; antenna incomplete, with 21 remaining segments, segments with bristly setae, third segment 0.7 times longer than fourth segment, length of third and fourth segments 2.5 and 4.7 times their width, respectively (Fig. 22); length of maxillary palp 1.4 times height of head; eye in dorsal view 2.1 times as long as temple (Fig. 23); eye in lateral view nearly as high as wide; vertex convex and glabrous (Fig. 25); OOL:diameter of ocellus:POL= 14:3:5; face 1.8 times wider than high, largely rugose (Fig. 24); clypeus rather small, truncate and slightly convex laterally (Fig. 24); malar space absent; mandible moderately widened dorsally, dorsal teeth large and lobe-shaped (Fig. 26), lateral teeth rather small and lobe-shaped (Fig. 27), middle tooth curved; medial length of mandible 1.6 times its maximum width (Fig. 27).

Mesosoma. Length of mesosoma 1.4 times its height; mesoscutum without lateral carina in front of tegula (Fig. 18); epicnemial area smooth except for a few crenulae; precoxal sulcus wide, with distinct crenulae medially, but anteriorly and posteriorly absent; remainder of mesopleuron smooth and glabrous; pleural sulcus narrowly crenulate; episternal scrobe small, connected by a furrow to pleural sulcus; metapleuron reticulate-rugose but smooth medially, with long setae and a round large pit anteriorly (Fig. 18); notauli wide, only anteriorly impressed on disc, widely crenulate and medio-posteriorly with a shallow, round depression; mesoscutum with some setae along notauli; scutellar sulcus deep and narrow, with one median carina and 2 short longitudinal carinae and 4.0 times wider than its maximum length; scutellum rather flat and wide (Fig. 19); surface of propodeum rugose, with rather distinct median carina on anterior half, areola present but inconspicuous (Fig. 20).

Wings (Figs 16, 17). Pterostigma elliptical, vein r 0.8 times width of pterostigma; r:3-SR:SR1 = 5:14:40; SR1, 1-SR+M nearly straight and 2-SR curved; cu-a postfurcal, short; 1-CU1:2-CU1 = 2:17; 3-CU1 longer than CU1b; 2-SR:3-SR:r-m = 19:25:8; m-cu postfurcal, slightly converging to 1-M posteriorly; first subdiscal cell 3.8 times as long as wide; M+CU1 unsclerotised. Hind wing: M+CU: 1-M:1r-m = 4:3:2; m-cu absent.

Legs. Hind coxa smooth; tarsal claws rather robust and shorter than arolium (Fig. 15); length of femur, tibia and basitarsus of hind leg 2.7, 7.5 and 5.0 times their width, respectively; apical bristles of first-fourth hind tarsal segments absent (Fig. 15).

Metasoma. Length of first tergite 0.7 times its apical width, its surface longitudinally striate, its dorsal carinae widely separate (Fig. 20); second tergite of metasoma with longitudinally striate anteriorly; laterope present; dorsope rather large (Fig. 21); setose part of ovipositor sheath 0.26 times as long as fore wing (total visible sheath 0.35 times), flattened and sparsely setose and 0.8 times as long as hind tibia.

Colour. Yellowish brown (Fig. 15); palpi yellow; 4 basal segments of antenna, pterostigma and veins yellowish brown; wing membrane slightly infuscated.

Variation.

Male is similar to female; body length of ♂ 2.3 mm, length of fore wing 2.4 mm, width of head 2.0 times its lateral length.

Notes.

The new species can be separated from all known species by the parallel-sided and long basal part of the pterostigma, vein r of fore wing comparatively close to the apex of the pterostigma and vein 3-SR of fore wing about 2.9 × as long as vein r.