Psyttalia latinervis Wu & van Achterberg

Wu, Qiong, Achterberg, Cornelis van, Tan, Jiang-Li & Chen, Xue-Xin, 2016, Review of the East Palaearctic and North Oriental Psyttalia Walker, with the description of three new species (Hymenoptera, Braconidae, Opiinae), ZooKeys 629, pp. 103-151 : 120-122

Taxon classification Animalia Hymenoptera Braconidae

Psyttalia latinervis Wu & van Achterberg sp. n. Figs 33, 34-43

Type material.

Holotype, ♂ (ZJUH), "[S. China:] Hainan, Bawangling Mts, 24-25.v.2007, Jingxian Liu, No. 200702714".

Comparative diagnosis.

Easily recognizable species, because of the unique long, widened and slightly curved vein 1-CU1 of the fore wing (Fig. 35) in combination with the largely unsclerotized vein 1-SR+M, the widened but short vein 2-SR+M, and parallel veins m-cu and 1-M of the fore wing (Fig. 35).

Description.

Holotype, ♂, length of body 3.5 mm, of fore wing 2.8 mm.

Head. Antenna with 43 segments, bristly and rather adpressed setose and 1.7 times as long as fore wing; third segment 1.4 times as long as fourth segment, length of third, fourth and penultimate segments 3.0, 2.2 and 1.8 times their width, respectively (Fig. 43); length of maxillary palp 0.9 times height of head; length of eye in dorsal view 3.2 times temple (Fig. 40); temple shiny, smooth except for some punctures posteriorly and with sparse setae; OOL: diameter of ocellus: POL = 45:22:30; area behind stemmaticum reclivous (Fig. 40); face coarsely punctate with interspaces about equal to diameter of punctures and with satin sheen (Fig. 39); frons slightly depressed behind antennal sockets and in front of anterior ocellus, shiny, smooth and glabrous but laterally setose and punctulate (Fig. 40); labrum nearly flat; clypeus transverse, convex, and its ventral margin truncate and thin (Fig. 39); width of clypeus 3.5 times its maximum height and 0.8 times width of face; hypoclypeal depression wide and deep (Figs 39, 41); malar suture largely absent; malar space 0.4 times longer than basal width of mandible and area micro-sculptured (Fig. 41); mandible not twisted, apically moderately narrowed and with both teeth wide, normal basally and with narrow ventral carina (Fig. 41); occipital carina remains far removed from hypostomal carina and dorsally largely absent; hypostomal carina medium-sized ventrally.

Mesosoma. Length of mesosoma 1.2 times its height; pronope absent, only with groove; pronotal side largely smooth, but anterior and posterior grooves present and posteriorly with some crenulae (Fig. 36); propleuron flattened; epicnemial area smooth dorsally; precoxal sulcus only medially present and moderately crenulate (Fig. 36); remainder of mesopleuron smooth and shiny; pleural sulcus smooth ventrally; mesosternal sulcus shallow, narrow and finely crenulate; postpectal carina absent; mesoscutum very shiny and nearly entirely glabrous (Fig. 37); notauli only anteriorly as pair of partly finely crenulate impressions and absent on disc; scutellar sulcus deep and with 7 short crenulae, parallel-sided medially; scutellum slightly convex and smooth, only laterally sparsely setose (Fig. 37); metanotum with short longitudinal carina antero-medially and short carina posteriorly (Figs 37-38); surface of propodeum smooth, except for crenulae near reversed Y-shaped median carina and with short lateral crenulate groove above spiracle (Figs 37-38).

Wings. Fore wing: 1-SR as long as wide and linear with 1-M; pterostigma triangular and r not linear with postero-basal border (Fig. 34); 1-R1 ending at wing apex and 1.7 times as long as pterostigma; r linear with 3-SR and medium-sized; r-m and most of 1-SR+M unsclerotized; r:3-SR:SR1 = 5:29:56; 2-SR:3-SR:r-m = 15:29:7; 1-M straight and SR1 slightly curved; m-cu narrowly antefurcal and slightly curved, subparallel with 1-M (Fig. 35); 2-SR+M short and widened; cu-a short, vertical and far postfurcal; 1-CU1 curved and widened; 1-CU1:2-CU1= 15:24; first subdiscal cell widened apically and closed, CU1b medium-sized; only apex of M+CU1 sclerotized. Hind wing: 2-M slightly sinuate; M+CU:1-M:1r-m = 20:21:10; cu-a straight; m-cu and SR absent.

Legs. Length of femur, tibia and basitarsus of hind leg 4.2, 7.8 and 4.2 times as long as width, respectively (Fig. 42); hind femur with long setae.

Metasoma. Length of first tergite 1.4 times its apical width, convex medio-posteriorly, its surface largely smooth except some sculpture subposteriorly (Fig. 38), dorsal carinae strong in basal half of tergite and with depressed area below; second suture not indicated; basal depressions of second tergite deep and elliptical; second tergite 0.7 times as long as third tergite; second and following tergites smooth, shiny and sparsely setose; combined length of second and third metasomal tergites 0.35 times total length of metasoma.

Colour. Ivory or white; head dorsally (but stemmaticum black), scapus, pedicellus, V-shaped patch on mesoscutum, mesoscutum laterally, tegulae, scutellum largely and apical margin of third–seventh tergites yellow; remainder of antenna brown with apices of segments dark brown; scutellum posteriorly, metanotum and propodeum brownish; remainder of mesoscutum and of second–seventh tergites dorsally, pterostigma and veins dark brown; wing membrane subhyaline.

Distribution.

China (Hainan).

Biology.

Unknown.

Etymology.

From “latus” (Latin for “wide”) and “nervus” (Latin for "nerve, vein") because of the widened vein 1-CU1 of the fore wing.